{
  "spore": "profile",
  "id": "hnbr",
  "spore_version": "0.2",
  "family": "nitrile-elastomers",
  "name": "Hydrogenated nitrile rubber (HNBR)",
  "abbreviation": "HNBR",
  "role": "Seal and O-ring elastomer for oil, fuel and heat service",
  "category": "seals-adhesives",
  "type": "elastomers-and-o-rings",
  "summary": "Hydrogenated nitrile rubber (HNBR, also called highly saturated nitrile, HSN) is a peroxide-cured elastomer made by saturating the butadiene double bonds of nitrile rubber with hydrogen. The Global O-Ring HNBR70 test report gives a hardness of 72 Shore A, a tensile strength of 23.4 MPa and an elongation of 282 percent. Its HNBR90 test report gives 87 Shore A, 21.6 MPa and 229 percent. Both data sheets give a temperature range of -40 °C to 150 °C.",
  "best_for": "Oil and fuel seals that must run hotter than standard nitrile, up to about 150 °C (Global O-Ring data sheets and Parker handbook)",
  "weakest_at": "Chlorinated hydrocarbons, ketones, ethers, esters and strong acids, which the data sheets list as poor; no ASTM E595 outgassing data was found in this run",
  "identity": {
    "formula": "Hydrogenated nitrile rubber: a nitrile-butadiene copolymer whose butadiene double bonds are saturated with hydrogen. The sources read give no monomer ratio or hydrogenation degree.",
    "designations": [],
    "source": "parker-handbook",
    "where": "Section 2.2.9 Hydrogenated Nitrile (HNBR, HSN); the saturation wording is also in the HNBR70 data sheet, General Information"
  },
  "tags": {
    "environments": [],
    "stresses": [
      "extreme-heat",
      "extreme-cold"
    ],
    "applications": [
      "mechanisms",
      "propulsion-and-tanks"
    ]
  },
  "properties": [
    {
      "benchmark": "hardness",
      "label": "Hardness, Shore A (70 durometer grade)",
      "value": 72,
      "bound": "exact",
      "unit": "Shore A",
      "scope": "material",
      "conditions": {
        "grade": "70 durometer, black, peroxide-cured",
        "test": "ASTM D2240-15",
        "requirement": "70±5"
      },
      "method": "Test report value on the Global O-Ring HNBR70 compound report",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Hardness, Shore A row, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Tensile strength (70 durometer grade)",
      "value": 23.4,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "grade": "70 durometer, black",
        "test": "ASTM D412-15",
        "printed_psi": 3393,
        "requirement": "min 2321 psi (16 MPa)"
      },
      "method": "Test report result, printed as 3393 (23.40) with psi first and MPa in brackets; the MPa figure is used here, as printed (23.40)",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Tensile Strength row, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "elongation",
      "label": "Elongation at break (70 durometer grade)",
      "value": 282,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "grade": "70 durometer, black",
        "test": "ASTM D412-15",
        "requirement": "min 250 percent"
      },
      "method": "Test report value on the Global O-Ring HNBR70 compound report",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Elongation, min, percent row, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "modulus_at_100_percent",
      "label": "Modulus at 100 percent elongation (70 durometer grade)",
      "value": 4.9,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "grade": "70 durometer, black",
        "test": "ASTM D412-15",
        "printed_psi": 710
      },
      "method": "Test report result, printed as 710 (4.90) psi and MPa; the MPa figure is used as printed",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Modulus at 100%, psi(MPa) row",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "density",
      "label": "Density (70 durometer grade)",
      "value": 1.18,
      "bound": "exact",
      "unit": "g/cm3",
      "scope": "material",
      "conditions": {
        "grade": "70 durometer, black",
        "unit_in_source": "Mg/m3 (printed as Mg/m³)",
        "test": "CNS 5341-96"
      },
      "method": "Test report value. Mg/m3 is the same unit as g/cm3, so the number is unchanged.",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Density row",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "compression_set",
      "label": "Compression set after 22 h at 150 °C (70 durometer grade)",
      "value": 13.1,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "grade": "70 durometer, black",
        "test": "ASTM D395-16B",
        "time": "22 h",
        "temperature": "150 °C",
        "requirement": "max 30 percent (button)"
      },
      "method": "Test report result, button specimen as printed (method B)",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "Test report, row B16, COMPRESSION SET, 22 hours at 150°C (302°F), max, percent",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "max_service_temp",
      "label": "Temperature range upper limit (data sheet)",
      "value": 150,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "basis": "Temperature Range line of the HNBR70 data sheet, printed as -40°C (-40°F) to 150°C (302°F)"
      },
      "method": "Supplier data sheet value, as printed",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "General Information, Temperature Range line",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "min_service_temp",
      "label": "Temperature range lower limit (data sheet)",
      "value": -40,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "basis": "Temperature Range line of the HNBR70 data sheet, printed as -40°C (-40°F) to 150°C (302°F)"
      },
      "method": "Supplier data sheet value, as printed",
      "status": "ground",
      "source": "globaloring-hnbr70",
      "where": "General Information, Temperature Range line",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
        "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "hardness",
      "label": "Hardness, Shore A (90 durometer grade)",
      "value": 87,
      "bound": "exact",
      "unit": "Shore A",
      "scope": "material",
      "conditions": {
        "grade": "90 durometer, black, peroxide-cured",
        "test": "ASTM D2240-15",
        "requirement": "90±5"
      },
      "method": "Test report value on the Global O-Ring HNBR90 compound report",
      "status": "ground",
      "source": "globaloring-hnbr90",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Hardness, Shore A row, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
        "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Tensile strength (90 durometer grade)",
      "value": 21.6,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "grade": "90 durometer, black",
        "test": "ASTM D412-16",
        "requirement": "min 10 MPa"
      },
      "method": "Test report value on the Global O-Ring HNBR90 compound report",
      "status": "ground",
      "source": "globaloring-hnbr90",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Tensile Strength, min, Mpa row, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
        "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "elongation",
      "label": "Elongation at break (90 durometer grade)",
      "value": 229,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "grade": "90 durometer, black",
        "test": "ASTM D412-16",
        "requirement": "min 100 percent"
      },
      "method": "Test report value on the Global O-Ring HNBR90 compound report",
      "status": "ground",
      "source": "globaloring-hnbr90",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Elongation, min, percent row, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
        "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "density",
      "label": "Specific gravity (90 durometer grade)",
      "value": 1.28,
      "bound": "exact",
      "unit": "g/cm3",
      "scope": "material",
      "conditions": {
        "grade": "90 durometer, black",
        "test": "ASTM D297-15",
        "unit_in_source": "g/cm³ (printed as Specific Gravity (g/cm³))"
      },
      "method": "Test report value on the Global O-Ring HNBR90 compound report",
      "status": "ground",
      "source": "globaloring-hnbr90",
      "where": "Test report, ORIGINAL PHYSICAL PROPERTIES, Specific Gravity row",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
        "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "compression_set",
      "label": "Compression set after 22 h at 150 °C (90 durometer grade)",
      "value": 17,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "grade": "90 durometer, black",
        "test": "ASTM D395-18",
        "method_letter": "B",
        "time": "22 h",
        "temperature": "150 °C",
        "requirement": "max 35 percent"
      },
      "method": "Test report result, method B, as printed",
      "status": "ground",
      "source": "globaloring-hnbr90",
      "where": "Test report, row B36, COMPRESSION SET, METHOD B, 22 hours at 150°C (302°F), max, percent",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
        "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "tr10_retraction_temperature",
      "label": "TR-10 retraction temperature (90 durometer grade)",
      "value": -21.9,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "grade": "90 durometer, black",
        "test": "ASTM D1329-16",
        "die": "51 mm",
        "elongation": "50 percent"
      },
      "method": "Test report value, printed as -21.9 under TR-10, Retraction at Lower Temperature Resistance, 51 mm die, 50% elongation, °C",
      "status": "ground",
      "source": "globaloring-hnbr90",
      "where": "Test report, row Z, TR-10 section, results column",
      "source_detail": {
        "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
        "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
        "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
        "kind": "datasheet",
        "license": "Supplier data sheet, cited"
      }
    },
    {
      "benchmark": "max_service_temp",
      "label": "Heat resistance upper limit (Parker)",
      "value": 150,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "basis": "Parker states Up to 150°C (300°F) under Heat resistance for hydrogenated nitrile"
      },
      "method": "Statement in the Parker O-ring handbook",
      "status": "ground",
      "source": "parker-handbook",
      "where": "Section 2.2.9 Hydrogenated Nitrile, Heat resistance",
      "source_detail": {
        "title": "Parker O-Ring Handbook (copy hosted by the University of Arizona)",
        "id": "Parker O-Ring Handbook, copy at the University of Arizona",
        "url": "https://nfc.arizona.edu/sites/default/files/2022-02/parker_o-ring_handbook.pdf",
        "kind": "handbook",
        "license": "Manufacturer handbook, cited"
      }
    },
    {
      "benchmark": "max_service_temp",
      "label": "Approximate service range upper limit (Parker table)",
      "value": 149,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "basis": "Approximate Service Temperature Ranges for Commonly Used Basic Polymer Types, Hydrogenated Nitrile row, printed as -32°C to 149°C (-23°F to 300°F) with an asterisk footnote not read"
      },
      "method": "Table value printed in degC first in the Parker handbook",
      "status": "ground",
      "source": "parker-handbook",
      "where": "Approximate Service Temperature Ranges table, Hydrogenated Nitrile row",
      "source_detail": {
        "title": "Parker O-Ring Handbook (copy hosted by the University of Arizona)",
        "id": "Parker O-Ring Handbook, copy at the University of Arizona",
        "url": "https://nfc.arizona.edu/sites/default/files/2022-02/parker_o-ring_handbook.pdf",
        "kind": "handbook",
        "license": "Manufacturer handbook, cited"
      }
    },
    {
      "benchmark": "min_service_temp",
      "label": "Approximate service range lower limit (Parker table)",
      "value": -32,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "basis": "Approximate Service Temperature Ranges for Commonly Used Basic Polymer Types, Hydrogenated Nitrile row, printed as -32°C to 149°C (-23°F to 300°F) with an asterisk footnote not read"
      },
      "method": "Table value printed in degC first in the Parker handbook",
      "status": "ground",
      "source": "parker-handbook",
      "where": "Approximate Service Temperature Ranges table, Hydrogenated Nitrile row",
      "source_detail": {
        "title": "Parker O-Ring Handbook (copy hosted by the University of Arizona)",
        "id": "Parker O-Ring Handbook, copy at the University of Arizona",
        "url": "https://nfc.arizona.edu/sites/default/files/2022-02/parker_o-ring_handbook.pdf",
        "kind": "handbook",
        "license": "Manufacturer handbook, cited"
      }
    },
    {
      "benchmark": "cold_flexibility_limit",
      "label": "Cold flexibility limit (Parker)",
      "value": -48,
      "bound": "exact",
      "unit": "°C",
      "scope": "material",
      "conditions": {
        "basis": "Parker states Down to approximately -48°C (-55°F) under Cold flexibility for hydrogenated nitrile"
      },
      "method": "Statement in the Parker O-ring handbook; this is a stated cold limit, not a test result",
      "status": "ground",
      "source": "parker-handbook",
      "where": "Section 2.2.9 Hydrogenated Nitrile, Cold flexibility",
      "source_detail": {
        "title": "Parker O-Ring Handbook (copy hosted by the University of Arizona)",
        "id": "Parker O-Ring Handbook, copy at the University of Arizona",
        "url": "https://nfc.arizona.edu/sites/default/files/2022-02/parker_o-ring_handbook.pdf",
        "kind": "handbook",
        "license": "Manufacturer handbook, cited"
      }
    }
  ],
  "corrosion": [
    {
      "environment": "Heat ageing, 70 h at 150 °C in air (70 durometer grade)",
      "headline": "Heat ageing for 70 h at 150 °C changes hardness by +3 points and elongation by -10 percent, with tensile strength unchanged.",
      "effect": "After 70 h at 150 °C (ASTM D865-11), the 70 durometer grade changed by +3 hardness points, 0 percent tensile strength, -10 percent elongation and 0.3 percent weight. The requirements were +10 points, -15 percent and -25 percent.",
      "rating": "low",
      "conditions": {
        "time": "70 h",
        "temperature": "150 °C",
        "standard": "ASTM D865-11",
        "grade": "70 durometer"
      },
      "source": "globaloring-hnbr70",
      "where": "Test report, A26 HEAT AGE rows"
    },
    {
      "environment": "Heat ageing, 70 h at 150 °C (90 durometer grade)",
      "headline": "Heat ageing for 70 h at 150 °C changes hardness by +6 points and elongation by -20.0 percent; tensile strength rose 17 percent.",
      "effect": "After 70 h at 150 °C (ASTM D573-10), the 90 durometer grade changed by +6 hardness points, +17 percent tensile strength and -20.0 percent elongation. The requirements were +10 points, -15 percent and -25 percent.",
      "rating": "low",
      "conditions": {
        "time": "70 h",
        "temperature": "150 °C",
        "standard": "ASTM D573-10",
        "grade": "90 durometer"
      },
      "source": "globaloring-hnbr90",
      "where": "Test report, A26 HEAT RESISTANCE rows"
    },
    {
      "environment": "IRM 901 oil, 70 h at 150 °C (70 durometer grade)",
      "headline": "In IRM 901 oil at 150 °C the 70 durometer grade swelled 2.8 percent in volume, with a small change in strength.",
      "effect": "After 70 h at 150 °C in IRM 901 oil (ASTM D471-16), the 70 durometer grade changed by +1 hardness point, +4 percent tensile strength, 0 percent elongation and -2.8 percent volume. The requirements were -5 to +10 points, -20 percent maximum tensile change, -30 percent maximum elongation change and -10 to +5 percent volume.",
      "rating": "low",
      "conditions": {
        "time": "70 h",
        "temperature": "150 °C",
        "standard": "ASTM D471-16",
        "oil": "IRM 901",
        "grade": "70 durometer"
      },
      "source": "globaloring-hnbr70",
      "where": "Test report, EO16 IRM901 OIL RESISTANCE rows"
    },
    {
      "environment": "IRM 903 oil, 70 h at 150 °C (70 durometer grade)",
      "headline": "In IRM 903 oil at 150 °C the 70 durometer grade swelled 10.2 percent in volume.",
      "effect": "After 70 h at 150 °C in IRM 903 oil (ASTM D471-16), the 70 durometer grade changed by -5 hardness points, -2 percent tensile strength, -4 percent elongation and +10.2 percent volume. The requirement for volume was +25 percent maximum.",
      "rating": "moderate",
      "conditions": {
        "time": "70 h",
        "temperature": "150 °C",
        "standard": "ASTM D471-16",
        "oil": "IRM 903",
        "grade": "70 durometer"
      },
      "source": "globaloring-hnbr70",
      "where": "Test report, EO36 IRM903 OIL RESISTANCE rows"
    },
    {
      "environment": "IRM 901 oil, 70 h at 150 °C (90 durometer grade)",
      "headline": "In IRM 901 oil at 150 °C the 90 durometer grade swelled 3 percent in volume, with tensile strength up 11 percent.",
      "effect": "After 70 h at 150 °C in IRM 901 oil (ASTM D471-16), the 90 durometer grade changed by +4 hardness points, +11 percent tensile strength, +2 percent elongation and -3 percent volume. The requirements were -5 to +10 points, -20 percent maximum tensile change, -30 percent maximum elongation change and -10 to +5 percent volume.",
      "rating": "low",
      "conditions": {
        "time": "70 h",
        "temperature": "150 °C",
        "standard": "ASTM D471-16",
        "oil": "IRM 901",
        "grade": "90 durometer"
      },
      "source": "globaloring-hnbr90",
      "where": "Test report, EO16 IRM901 OIL RESISTANCE rows"
    },
    {
      "environment": "IRM 903 oil, 70 h at 150 °C (90 durometer grade)",
      "headline": "In IRM 903 oil at 150 °C the 90 durometer grade swelled 13 percent in volume and lost 17 percent elongation.",
      "effect": "After 70 h at 150 °C in IRM 903 oil (ASTM D471-16), the 90 durometer grade changed by -3 hardness points, -4 percent tensile strength, -17 percent elongation and +13 percent volume. The requirement for volume was +25 percent maximum.",
      "rating": "moderate",
      "conditions": {
        "time": "70 h",
        "temperature": "150 °C",
        "standard": "ASTM D471-16",
        "oil": "IRM 903",
        "grade": "90 durometer"
      },
      "source": "globaloring-hnbr90",
      "where": "Test report, EO36 IRM903 OIL RESISTANCE rows"
    },
    {
      "environment": "Water and steam",
      "headline": "HNBR resists water and steam up to about 150 °C, but the two sources give slightly different limits.",
      "effect": "Parker lists water and steam up to 149°C (300°F) as compatible. The Global O-Ring data sheets say water and steam to 150 ºC (300 ºF). Both are qualitative statements without test conditions.",
      "rating": "none",
      "conditions": {
        "basis": "qualitative statements, no test duration given"
      },
      "source": "parker-handbook",
      "where": "Section 2.2.9 Hydrogenated Nitrile, chemical resistance list"
    },
    {
      "environment": "Chlorinated hydrocarbons, ketones, ethers, esters and strong acids",
      "headline": "The data sheets list these media as poor for HNBR.",
      "effect": "The HNBR70 and HNBR90 data sheets both list chlorinated hydrocarbons, ketones, ethers, esters and strong acids under Doesn't Perform Well In. Parker lists chlorinated hydrocarbons, polar solvents (ketones, esters and ethers) and strong acids as not compatible.",
      "rating": "severe",
      "conditions": {
        "basis": "qualitative lists, no test values given"
      },
      "source": "globaloring-hnbr70",
      "where": "Doesn't Perform Well In box (same list on the HNBR90 data sheet); Parker section 2.2.9 Not compatible with list"
    },
    {
      "environment": "Ozone, ageing and weathering",
      "headline": "Parker rates HNBR as resistant to ozone, ageing and weathering, with no test values.",
      "effect": "Parker lists ozone, ageing and weathering under HNBR chemical resistance. The sources read give no numbers for this.",
      "rating": "none",
      "conditions": {
        "basis": "qualitative statement, no test conditions given"
      },
      "source": "parker-handbook",
      "where": "Section 2.2.9 Hydrogenated Nitrile, chemical resistance list"
    }
  ],
  "risks": {
    "hazards": [
      {
        "text": "No hazard classification found in this run. The HNBR data sheets have no hazard section, and no safety data sheet for an HNBR compound was retrieved.",
        "ghs": [],
        "source": "globaloring-hnbr70",
        "where": "Data sheet, no hazard section"
      }
    ],
    "failure_risks": [
      {
        "mode": "Stiffening and loss of flexibility at low temperature",
        "trigger": "Service below the cold limits: TR-10 retraction of -21.9 °C for the 90 durometer grade and Parker's cold flexibility limit of about -48 °C",
        "consequence": "The seal loses flexibility below these limits. The sources read give no leak threshold.",
        "severity": "moderate",
        "source": "globaloring-hnbr90",
        "where": "Test report, TR-10 row; Parker section 2.2.9 Cold flexibility"
      },
      {
        "mode": "Permanent set after long compression in heat",
        "trigger": "Compressed at 150 °C for 22 h",
        "consequence": "The seal recovers less of its shape: 13.1 percent set for the 70 durometer grade and 17 percent for the 90 durometer grade",
        "severity": "moderate",
        "source": "globaloring-hnbr70",
        "where": "Test report, B16 COMPRESSION SET row"
      },
      {
        "mode": "Swelling in IRM 903 oil",
        "trigger": "Service in IRM 903 oil at 150 °C for 70 h",
        "consequence": "The compound swells 10.2 percent (70 durometer) and 13 percent (90 durometer) in volume, with elongation loss up to 17 percent",
        "severity": "moderate",
        "source": "globaloring-hnbr90",
        "where": "Test report, EO36 IRM903 OIL RESISTANCE rows"
      },
      {
        "mode": "Attack by chlorinated hydrocarbons, ketones, ethers, esters and strong acids",
        "trigger": "Service in these media",
        "consequence": "The data sheets list these media as poor for HNBR. No test values are given in the sources read.",
        "severity": "critical",
        "source": "globaloring-hnbr70",
        "where": "Doesn't Perform Well In box"
      }
    ],
    "side_effects": [
      {
        "text": "No side effects found in this run.",
        "affects": "Not sourced",
        "source": "parker-handbook",
        "where": "not found"
      }
    ],
    "handling": [
      {
        "text": "Read the supplier safety data sheet for the specific HNBR compound before handling. None was retrieved in this run.",
        "source": "globaloring-hnbr70"
      },
      {
        "text": "Keep service within the datasheet range of -40 °C to 150 °C, as printed on both data sheets.",
        "source": "globaloring-hnbr90"
      }
    ],
    "mitigations": [
      {
        "text": "The sources read give no mitigation for oil or chemical exposure. Check the grade against the medium before use, as the data sheets list poor media.",
        "source": "globaloring-hnbr70"
      }
    ]
  },
  "uses": [
    {
      "application": "propulsion-and-tanks",
      "device": "O-ring and seal in petroleum-based oil and fuel service",
      "example": "The HNBR70 data sheet says HNBR performs well in petroleum based oils and fuels and in aliphatic hydrocarbons. No space mission is named in the sources read.",
      "source": "globaloring-hnbr70",
      "where": "Performs Well In box"
    },
    {
      "application": "mechanisms",
      "device": "Hydraulic and mineral-oil seals in dynamic service",
      "example": "Parker says hydrogenated nitrile has superior mechanical characteristics, particularly high strength, which helps reduce extrusion and wear, and lists HFA, HFB and HFC hydraulic fluids as compatible. No space mission is named in the sources read.",
      "source": "parker-handbook",
      "where": "Section 2.2.9 Hydrogenated Nitrile, opening paragraph and chemical resistance list"
    }
  ],
  "supply": [],
  "media": [],
  "documents": [
    {
      "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report",
      "type": "datasheet",
      "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf"
    },
    {
      "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report",
      "type": "datasheet",
      "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf"
    },
    {
      "title": "Parker O-Ring Handbook (copy hosted by the University of Arizona)",
      "type": "report",
      "url": "https://nfc.arizona.edu/sites/default/files/2022-02/parker_o-ring_handbook.pdf"
    }
  ],
  "gaps": [
    "Only three sources were read in this run. The brief asks for at least five. The web search budget for this turn was used up before the manufacturer datasheets from Zeon or Lanxess could be found, and the Wikipedia title tried returned no article.",
    "Designations: no UNS, EN, ASTM, ISO or trade designation for HNBR was printed in any source read. The ASTM D2000 line call-outs M4DH716 (70 durometer) and M4DH910 (90 durometer) on the test reports classify these compounds; they are not designations of HNBR as a material and are not listed under identity.designations.",
    "Monomer composition and acrylonitrile share: not stated in any source read. The data sheets name only the butadiene segments; the nitrile monomer ratio is not given.",
    "Supply: no producer, country share, feedstock or critical-mineral status for HNBR was found. No USGS, BGS or trade source was read in this run.",
    "Hazards and GHS: the PubChem pages for acrylonitrile and 1,3-butadiene returned a reCAPTCHA page in this run, so no GHS data were read. No HNBR safety data sheet was retrieved.",
    "Outgassing to ASTM E595 (TML and CVCM) for HNBR: not found. NASA RP-1124 Revision 4 (NTRS 19970027853) was read in this run and has no hydrogenated nitrile or nitrile entry.",
    "Atomic oxygen, radiation resistance and spaceflight data for HNBR: not found in any source read. No spacecraft flight use was named.",
    "The HNBR70 test report marks brittleness temperature as pass with no cracks at T-50 in isopropyl alcohol (ASTM D2137-11A), but prints no numeric temperature. No value was recorded.",
    "Property names not in spores/property-canon.yaml: hardness, compression_set, modulus_at_100_percent, tr10_retraction_temperature and cold_flexibility_limit. The canonical names were used where they exist (ultimate_tensile_strength, elongation, density, max_service_temp, min_service_temp).",
    "Heat-age and oil-swell results are recorded in corrosion, not as properties, because the sources give them as changes against a requirement.",
    "The Parker table footnote marked with an asterisk, which applies to the HNBR service range, was not read."
  ],
  "story": {
    "why": "HNBR (hydrogenated nitrile rubber, also called HSN) is a heat-resistant seal elastomer. The Global O-Ring HNBR70 and HNBR90 test reports and the Parker handbook say it resists heat, oils, fuels and ozone better than standard nitrile, with a service range of -40 °C to 150 °C on the data sheets. Its weak points are chlorinated hydrocarbons, ketones, ethers, esters and strong acids.",
    "uses": [
      {
        "where": "O-rings and seals in petroleum oil and fuel service",
        "line": "The HNBR70 data sheet lists petroleum based oils and fuels and aliphatic hydrocarbons under Performs Well In. No space mission is named in the sources read."
      },
      {
        "where": "Hydraulic and mineral-oil seals",
        "line": "Parker says hydrogenated nitrile has high strength that reduces extrusion and wear, and lists HFA, HFB and HFC hydraulic fluids as compatible."
      }
    ],
    "can_do": [
      {
        "label": "Temperature",
        "line": "Both Global O-Ring data sheets print a temperature range of -40 °C (-40 °F) to 150 °C (302 °F). Parker's approximate service table gives -32 °C to 149 °C for hydrogenated nitrile.",
        "scope": "material",
        "value": "-40 °C to 150 °C"
      },
      {
        "label": "Hardness and strength",
        "line": "The 70 durometer grade has a hardness of 72 Shore A, a tensile strength of 23.4 MPa and an elongation of 282 percent. The 90 durometer grade has 87 Shore A, 21.6 MPa and 229 percent.",
        "scope": "material",
        "value": "72 Shore A, 23.4 MPa"
      },
      {
        "label": "Compression set",
        "line": "After 22 hours at 150 °C (ASTM D395), the 70 durometer grade keeps 13.1 percent set and the 90 durometer grade 17 percent. Both are well under the printed maxima of 30 and 35 percent.",
        "scope": "material",
        "value": "13.1 percent (70 grade), 17 percent (90 grade)"
      },
      {
        "label": "Cold limit",
        "line": "The 90 durometer grade gives a TR-10 retraction temperature of -21.9 °C (ASTM D1329-16). Parker gives a cold flexibility limit of about -48 °C.",
        "scope": "material",
        "value": "-21.9 °C TR-10"
      }
    ],
    "compare": "The Global O-Ring data sheets say HNBR has superior heat, ozone, chemical resistance and mechanical characteristics over standard nitrile (NBR). Parker's approximate service table gives HNBR -32 °C to 149 °C, and its general text gives up to 150 °C for heat. The two sources differ by one degree at the top end, and both are shown in the record. No NBR or fluoroelastomer values were read into this profile; for a fluoroelastomer comparison see the FKM profile.",
    "compare_rows": [
      {
        "label": "Upper service limit",
        "benchmark": "max_service_temp",
        "scope": "material"
      },
      {
        "label": "Lower service limit",
        "benchmark": "min_service_temp",
        "scope": "material"
      },
      {
        "label": "Compression set after 22 h at 150 °C",
        "benchmark": "compression_set",
        "scope": "material"
      }
    ],
    "handling": [
      "Read the product safety data sheet before use. None was retrieved here.",
      "Keep service within -40 °C to 150 °C, the range printed on both data sheets.",
      "Check the medium before use. The data sheets list chlorinated hydrocarbons, ketones, ethers, esters and strong acids as poor."
    ],
    "good_for": [
      "Oil and fuel seals at high temperature: the data sheets give a range of -40 °C to 150 °C and list petroleum oils, fuels and aliphatic hydrocarbons as performing well.",
      "Hydraulic seals: Parker lists HFA, HFB and HFC hydraulic fluids as compatible and says the high strength reduces extrusion and wear."
    ],
    "watch_out": [
      "Ketones, esters, ethers, chlorinated hydrocarbons and strong acids: the data sheets and Parker list them as poor or not compatible.",
      "Heat ageing: 70 h at 150 °C changes hardness by +3 to +6 points and elongation by -10 to -20 percent across the two grades.",
      "Cold: TR-10 retraction is -21.9 °C for the 90 durometer grade, and Parker's cold flexibility limit is about -48 °C.",
      "Space use: no outgassing (ASTM E595), radiation or atomic oxygen data was found, so this profile does not clear HNBR for vacuum or spaceflight use."
    ],
    "verdict": "HNBR is a well-documented seal elastomer for oil, fuel and heat service up to 150 °C, with supplier test data for two durometer grades. The Parker handbook and the two data sheets agree on its range, and differ by one degree at the top end. Missing from this profile: composition ratios, supply, GHS hazards, outgassing and any flight data.",
    "recipe": {
      "line": "HNBR is nitrile rubber (NBR) with its butadiene double bonds saturated by hydrogen (Global O-Ring data sheets; Parker section 2.2.9). The compounds are peroxide-cured (both data sheets). The sources read give no monomer ratio, hydrogenation degree or catalyst.",
      "parts": [
        {
          "name": "Acrylonitrile",
          "role": "Polar nitrile comonomer in the NBR base polymer",
          "share_note": "No share given in any source read; the nitrile unit is named by the polymer family"
        },
        {
          "name": "Butadiene",
          "role": "Butadiene segments whose double bonds are saturated by hydrogen in the HNBR process",
          "share_note": "No share given in any source read"
        }
      ]
    },
    "risk_groups": [
      {
        "title": "For people",
        "lead": "No hazard classification was retrieved for HNBR in this run. Read the supplier safety data sheet for the compound before handling.",
        "points": [
          {
            "label": "Safety data",
            "line": "The data sheets carry no hazard section, and no safety data sheet for an HNBR compound was retrieved."
          }
        ]
      },
      {
        "title": "For the monomers",
        "lead": "PubChem returned a reCAPTCHA page for acrylonitrile and 1,3-butadiene in this run, so no GHS classification was read for either monomer.",
        "points": [
          {
            "label": "Monomers",
            "line": "Acrylonitrile and butadiene are the monomer feedstocks named in the polymer family; their hazards have not been checked in this profile."
          }
        ],
        "verdict": "Hazard data not retrieved in this run"
      }
    ]
  },
  "updated": "2026-11-01",
  "review": {
    "status": "draft",
    "method": "assistant",
    "checked_values": 18,
    "unreachable": 0,
    "caveats": 0,
    "note": "Written on 2026-11-01 from the two Global O-Ring HNBR data sheets (test reports, read by pdftotext and page images) and the Parker O-Ring Handbook, section 2.2.9 and the approximate service table, all read in this run. PubChem and the Wikipedia title tried were unavailable. Three sources, below the five the brief asks for."
  },
  "sources": {
    "globaloring-hnbr70": {
      "title": "Global O-Ring and Seal, O-Ring Compound HNBR70 Data Sheet and test report (70 durometer, black)",
      "id": "Global O-Ring HNBR70 data sheet, uploaded 2019/09",
      "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR70.pdf",
      "kind": "datasheet",
      "license": "Supplier data sheet, cited"
    },
    "globaloring-hnbr90": {
      "title": "Global O-Ring and Seal, O-Ring Compound HNBR90 Data Sheet and test report (90 durometer, black)",
      "id": "Global O-Ring HNBR90 data sheet, uploaded 2019/09",
      "url": "https://www.globaloring.com/wp-content/uploads/2019/09/HNBR90.pdf",
      "kind": "datasheet",
      "license": "Supplier data sheet, cited"
    },
    "parker-handbook": {
      "title": "Parker O-Ring Handbook (copy hosted by the University of Arizona)",
      "id": "Parker O-Ring Handbook, copy at the University of Arizona",
      "url": "https://nfc.arizona.edu/sites/default/files/2022-02/parker_o-ring_handbook.pdf",
      "kind": "handbook",
      "license": "Manufacturer handbook, cited"
    }
  },
  "license": "CC-BY-4.0",
  "url": "https://spacemushroom.com/profiles/hnbr/"
}