spore: profile
id: tenax-hta
spore_version: 0.2
family: carbon-materials
name: Tenax HTA carbon fibre
abbreviation: HTA40
role: reinforcing fibre
category: carbon
type: carbon-fiber
summary: |
  Tenax HTA40 is a Teijin carbon fibre filament in the standard-modulus group. Teijin's typical values for the E13 3K 200tex 15Z product give a tensile strength of 4100 MPa and a tensile modulus of 240 GPa on bare filament, with a density of 1.77 g/cm3. Teijin also lists a PEEK laminate built from HTA40 fabric, with a tensile strength of 963 MPa in the 0 degree direction. The sources read give no HTA40 data for oxidation, ageing or outgassing, and the only safety data sheet read is for a different carbon thread product.
best_for: Stiffness and strength along the fibre at a density of 1.77 g/cm3 (Teijin typical values for Tenax HTA40)
weakest_at: No HTA40 ageing, oxidation or outgassing data in the sources read, and no grade-specific hazard data
identity:
  formula: Carbon filament, composed mostly of carbon atoms (Wikipedia definition); no composition for HTA40 is printed in the sources read
  source: teijin-overview
  where: Product overview, HTA40 rows (grade, filament count, yield and filament diameter columns); composition from the Wikipedia Carbon fibers article
  designations:
    - system: Trade name
      code: Tenax
      source: teijin-overview
      where: Document title, Tenax filament yarn overview
    - system: Trade name
      code: HTA40
      source: teijin-overview
      where: Fiber family column, HTA40 rows
    - system: Trade name
      code: HTA40 E13 3K 200tex
      source: teijin-tpwf-laminate
      where: Carbon Fiber line of the PEEK laminate data sheet
tags:
  environments: []
  stresses: []
  applications:
    - structures
properties:
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, Tenax HTA40 E13 3K 200tex 15Z fibre
    value: 4100
    unit: MPa
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z, bare filament
      basis: typical value, as the Teijin overview states that all data are typical values
    method: Typical value printed in the Teijin product overview, MPa column
    status: ground
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, tensile strength columns
  - benchmark: elastic_modulus
    label: Tensile modulus, Tenax HTA40 E13 3K 200tex 15Z fibre (first test method)
    value: 240
    unit: GPa
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z, bare filament
      basis: first printed modulus pair in the row
    method: Typical value printed in the Teijin product overview, GPa column
    status: ground
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, tensile modulus columns
  - benchmark: elastic_modulus
    label: Tensile modulus, Tenax HTA40 E13 3K 200tex 15Z fibre (second test method)
    value: 230
    unit: GPa
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z, bare filament
      basis: second test method printed in the same row; the Teijin overview gives a different test method for this pair
    method: Typical value printed in the Teijin product overview, second modulus pair in the row
    status: ground
    note: The overview prints two moduli for this row. The first pair (240 GPa) is the one used in the story.
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, second tensile modulus pair
  - benchmark: elongation
    label: Elongation at break, Tenax HTA40 E13 3K 200tex 15Z fibre
    value: 1.7
    unit: '%'
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z, bare filament
    method: Typical value printed in the Teijin product overview
    status: ground
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, elongation at break column
  - benchmark: density
    label: Density, Tenax HTA40 E13 3K 200tex 15Z fibre
    value: 1.77
    unit: g/cm3
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z, bare filament
    method: Typical value printed in the Teijin product overview; the PEEK laminate data sheet prints the same 1.77 g/cm3 for the HTA40 E13 3K 200tex fibre
    status: ground
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, density column
  - benchmark: filament_diameter
    label: Filament diameter, Tenax HTA40 fibre
    value: 7
    unit: µm
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z
    method: Value printed in the Teijin product overview, filament diameter column (not in the property canon; snake_case name used)
    status: ground
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, filament diameter column
  - benchmark: linear_density
    label: Linear density (yield without sizing), Tenax HTA40 E13 3K fibre
    value: 200
    unit: tex
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K, before sizing
    method: Printed yield value in the Teijin product overview; the German sheet gives the same value under Garnfeinheit (ohne Präparation)
    status: ground
    note: Not in the property canon; snake_case name used. The 1K and 6K HTA40 tows have their own yield values in the same table and are not profiled here.
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, yield (without sizing) column
  - benchmark: sizing_content
    label: Sizing level, Tenax HTA40 E13 3K 200tex 15Z fibre
    value: 1.3
    unit: '%'
    scope: material
    conditions:
      fibre: Tenax HTA40 E13 3K 200tex 15Z
      sizing_type: EP as printed in the overview
    method: Value printed in the Teijin product overview, size level column (not in the property canon; snake_case name used)
    status: ground
    source: teijin-overview
    where: Product overview table, row HTA40 E13 3K 200tex 15Z, sizing and size level columns
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, Tenax-E PEEK laminate with HTA40 fabric (0 degree direction)
    value: 963
    unit: MPa
    scope: material
    conditions:
      material: 'Laminate, not the bare fibre: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285 (PEEK matrix, 5HS fabric)'
      direction: 0 degree
      test: EN ISO 527-4
      conditioning: 23 °C / 50 % r.h.
    method: Typical value printed in the Teijin laminate data sheet, tensile strength (0 degree) row
    status: ground
    source: teijin-tpwf-laminate
    where: Properties table, Tensile (0 degree), strength row
  - benchmark: elastic_modulus
    label: Tensile modulus, Tenax-E PEEK laminate with HTA40 fabric (0 degree direction)
    value: 60
    unit: GPa
    scope: material
    conditions:
      material: 'Laminate, not the bare fibre: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285'
      direction: 0 degree
      test: EN ISO 527-4
      conditioning: 23 °C / 50 % r.h.
    method: Typical value printed in the Teijin laminate data sheet, modulus row under tensile
    status: ground
    source: teijin-tpwf-laminate
    where: Properties table, Tensile (0 degree), modulus row
  - benchmark: flexural_strength
    label: Flexural strength, Tenax-E PEEK laminate with HTA40 fabric (0 degree direction)
    value: 1166
    unit: MPa
    scope: material
    conditions:
      material: 'Laminate, not the bare fibre: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285'
      direction: 0 degree
      test: EN 2562 A
      conditioning: 23 °C / 50 % r.h.
    method: Typical value printed in the Teijin laminate data sheet, flexure strength row
    status: ground
    source: teijin-tpwf-laminate
    where: Properties table, Flexure (0 degree), strength row
  - benchmark: flexural_modulus
    label: Flexural modulus, Tenax-E PEEK laminate with HTA40 fabric (0 degree direction)
    value: 64
    unit: GPa
    scope: material
    conditions:
      material: 'Laminate, not the bare fibre: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285'
      direction: 0 degree
      test: EN 2562 A
      conditioning: 23 °C / 50 % r.h.
    method: Typical value printed in the Teijin laminate data sheet, flexure modulus row
    status: ground
    source: teijin-tpwf-laminate
    where: Properties table, Flexure (0 degree), modulus row
  - benchmark: compressive_strength
    label: Compression strength, Tenax-E PEEK laminate with HTA40 fabric (0 degree direction)
    value: 725
    unit: MPa
    scope: material
    conditions:
      material: 'Laminate, not the bare fibre: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285'
      direction: 0 degree
      test: EN 2850 B1/B2
      conditioning: 23 °C / 50 % r.h.
    method: Typical value printed in the Teijin laminate data sheet, compression strength row (not in the property canon; snake_case name used)
    status: ground
    source: teijin-tpwf-laminate
    where: Properties table, Compression (0 degree), strength row
  - benchmark: glass_transition_temperature
    label: Glass transition temperature, Tenax-E PEEK laminate with HTA40 fabric
    value: 143
    unit: °C
    scope: material
    conditions:
      material: 'Laminate, not the bare fibre: PEEK matrix of Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285'
      test: ISO 11357
      conditioning: 23 °C / 50 % r.h.
    method: Typical value printed in the Teijin laminate data sheet, glass transition row
    status: ground
    source: teijin-tpwf-laminate
    where: Properties table, Glass Transition Temperature row
corrosion: []
risks:
  hazards:
    - text: The Rave safety data sheet for a high-purity carbon fibre thread (a different product from Tenax HTA40, sold under CAS 7782-42-5) says the substance does not meet the criteria for classification.
      ghs: []
      source: rave-cf-sds
      where: Section 2.1 (classification)
    - text: The same Rave sheet says inhalation of dust may irritate the respiratory system and dust can cause eye irritation.
      ghs: []
      source: rave-cf-sds
      where: Section 11 (symptoms related to toxicological characteristics)
  failure_risks:
    - mode: Violent reaction with strong oxidisers
      trigger: Contact with strong oxidisers or peroxides (incompatible materials)
      consequence: The Rave sheet says violent reactions may occur. The sheet is for a generic high-purity thread, not for Tenax HTA40.
      severity: high
      source: rave-cf-sds
      where: Section 10.3 (possibility of hazardous reactions) and section 10.5 (incompatible materials)
  side_effects: []
  handling:
    - text: Avoid creating or accumulating dust or fine particles.
      source: rave-cf-sds
      where: Section 10.4 (conditions to avoid) and control procedures
    - text: Keep away from strong oxidisers and peroxides.
      source: rave-cf-sds
      where: Section 10.5 (incompatible materials)
  mitigations: []
uses:
  - application: structures
    device: Aerospace, automotive and industrial parts made from Tenax filament yarn (general Teijin statement; HTA40 is not named)
    example: Teijin says its Tenax filament yarn is used in products made for aerospace, automotive and several industrial applications.
    source: teijin-filament-page
    where: Introduction paragraph of the filament yarn page
  - application: structures
    device: PEEK thermoplastic laminate with HTA40 fabric (Tenax-E TPWF PEEK HTA40)
    example: Teijin publishes a PEEK laminate built from HTA40 fabric and gives its strength values, but the data sheet names no end use.
    source: teijin-tpwf-laminate
    where: Product data sheet, header block and properties table
supply:
  - subject: Carbon fibre precursor (polyacrylonitrile, rayon or pitch)
    abundance: 'Not applicable: a synthetic fibre made from a polymer or pitch precursor; Wikipedia lists polyacrylonitrile, rayon and pitch as the precursors.'
    producers: []
    manufacture: 'The sources read do not say where Tenax HTA40 filament is made. Teijin''s downloads page lists quality certificates for Teijin Limited sites at Mishima and Ibigawa (Japan), for Teijin Carbon America at Rockwood and Greenwood (USA), and for Teijin Carbon Europe without a site name. The PEEK laminate data sheet prints ''Production site: Europe'' for that laminate only.'
    source: teijin-downloads
    where: Downloads page, certificate sections; PEEK laminate data sheet, header block
media: []
documents:
  - title: Tenax filament yarn product overview (Teijin Carbon, PDS dated 2026-04-15)
    type: datasheet
    url: https://www.teijincarbon.com/fileadmin/user_upload/Datenbl%C3%A4tter/Filament_Yarn/EU_Filament_overview.pdf
    year: 2026
  - title: 'Produktdatenblatt TSG01de: Tenax filament yarn (Teijin Carbon Europe, 2025-02-15)'
    type: datasheet
    url: https://www.teijincarbon.com/fileadmin/user_upload/Datenbl%C3%A4tter/Filament_Yarn/Product_Data_Sheet_TSG01de__EU_Filament__de____DE_.pdf
    year: 2025
  - title: 'Product data sheet: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285 (Teijin, version 1.2)'
    type: datasheet
    url: https://www.teijincarbon.com/fileadmin/user_upload/Datenbl%C3%A4tter/ThermoPlastics/TPWF/PEEK/Product_Data_Sheet_TSPTP201__6200_Tenax%E2%84%A2-E_TPWF_PEEK-4-42-HTA40_E13_3K_DT-5HS-285_.pdf
    year: 2022
  - title: 'Safety data sheet: High purity carbon fibers in carbon fiber threads, SDS00170CC1016 v4.0 (Rave Scientific, not a Tenax grade)'
    type: sds
    url: https://ravescientific.com/images/pdf/SDS00170CC1016-01_Carbon_Fibre.pdf
    year: 2022
gaps:
  - No ageing, oxidation, UV, atomic-oxygen or outgassing data for Tenax HTA40 fibre was found in the sources read; corrosion is left empty for that reason.
  - The precursor (polyacrylonitrile, rayon or pitch) and the process used for Tenax HTA40 are not stated in any Teijin page read. Wikipedia lists the general precursors only.
  - No Teijin safety data sheet for HTA40 was found. The Rave sheet is for a high-purity carbon thread (CAS 7782-42-5), not a Tenax grade, and is used only as a general hazard reference.
  - The Teijin filament yarn handling recommendation (linked from the downloads page) is an image-only PDF; no text could be extracted from it.
  - PubChem's GHS summary for acrylonitrile, the precursor monomer, could not be read (the site returned an automated-access check page), so no precursor hazard entry is given.
  - No production share by country and no production site for the HTA40 fibre itself were found in any source read.
  - Thermal conductivity, specific heat and coefficient of thermal expansion for Tenax HTA40 were not found. Values for Toray T700S are not used because they are a different fibre.
  - Matweb's HTA40 datasheet page returned HTTP 403 and was not read.
  - No UNS, EN or ISO designation for this fibre was found in a source read.
  - The overview gives typical values only; no minimum or guaranteed values were found.
  - Filament diameter, linear density (yield) and sizing level are not in the property canon; written as snake_case names. Severity 'high' for the violent-reaction failure mode is assigned by Space Mushroom from the SDS wording.
  - The laminate rows are PEEK laminate values with HTA40 fabric, not bare-fibre values, and are labelled as such. The Airbus nacelle prepreg mentioned by a search result was not confirmed as HTA40 and is not used.
license: CC-BY-4.0
updated: '2026-11-01'
review:
  status: draft
  method: assistant
  checked_values: 14
  unreachable: 2
  caveats: 4
  note: 'Written by an AI assistant on 2026-11-01 from Teijin pages and PDFs read in this run. Unreachable: the Matweb HTA40 page (HTTP 403) and the PubChem acrylonitrile record (automated-access check). Caveats: all Teijin fibre values are typical values from the overview; the 230 GPa modulus is a second test method; the laminate rows are composite values, not fibre values; the hazard data come from a different carbon thread product.'
story:
  recipe:
    line: Carbon fibre is a filament composed mostly of carbon atoms (Wikipedia). The sources read do not state the precursor or the process used for Tenax HTA40; Wikipedia lists polyacrylonitrile, rayon and pitch as the general precursors.
    parts:
      - name: Carbon
        share: Composed mostly of carbon atoms (Wikipedia); no share for HTA40 is printed in the sources read
        role: Forms the graphitic filament. The stiffness and strength along the fibre come from the carbon structure, and the fibre diameter is set by the product grade.
  risk_groups:
    - title: For people
      level: 1
      verdict: Dust can irritate; no classification in the SDS read
      lead: The only safety data sheet read is for a high-purity carbon thread from another supplier, not for Tenax HTA40. It says the product does not meet the criteria for classification, but it warns about dust.
      points:
        - label: Dust
          line: The sheet says inhalation of dust may irritate the respiratory system and dust can cause eye irritation.
        - label: Classification
          line: The sheet says the substance does not meet the criteria for classification.
    - title: If it fails
      lead: The failure mode read for this fibre family is a violent reaction with strong oxidisers and peroxides.
      points:
        - label: Oxidisers
          line: The sheet says violent reactions may occur with strong oxidisers and peroxides. It is a generic thread sheet, so it is a warning for the material class, not a measured HTA40 result.
    - title: Handling and storage
      points:
        - label: Dust
          line: Avoid creating or accumulating dust. Dust control and eye protection are listed in the sheet's control procedures.
        - label: Oxidisers
          line: Keep the fibre away from strong oxidisers and peroxides.
  why: Tenax HTA40 is a Teijin carbon fibre filament in the standard-modulus group. Teijin's typical values give a tensile strength of 4100 MPa and a tensile modulus of 240 GPa on bare filament. The same row prints 230 GPa on a second test method. The density is 1.77 g/cm3, so stiffness and strength per unit mass are the reason to use it. The sources read give no HTA40 data for oxidation, ageing or outgassing, so the fibre cannot yet be ranked for space use.
  uses:
    - where: Structures in aerospace, automotive and industrial parts
      line: Teijin says its Tenax filament yarn is used in products made for aerospace, automotive and several industrial applications. The statement covers the filament yarn range as a whole, not HTA40 alone.
    - where: PEEK thermoplastic laminate
      line: Teijin publishes a PEEK laminate built from HTA40 fabric. Its data sheet gives a laminate tensile strength of 963 MPa at 0 degrees, but names no end use.
  can_do:
    - label: Tensile strength
      line: Carry tensile loads along the fibre at a typical strength of 4100 MPa (Teijin overview, bare filament).
    - label: Tensile modulus
      line: Give a typical tensile modulus of 240 GPa along the fibre, with 230 GPa on a second test method (Teijin overview).
    - label: Low mass
      line: The typical density is 1.77 g/cm3 (Teijin overview).
    - label: Laminate strength
      line: Make a PEEK laminate with a typical tensile strength of 963 MPa at 0 degrees (Teijin laminate sheet; composite value, not fibre).
  compare: Among the Teijin fibre data read for this profile, Tenax HTA40 is the standard-modulus grade with a typical tensile strength of 4100 MPa, a tensile modulus of 240 GPa and a density of 1.77 g/cm3 (Teijin overview). Its elongation at break is 1.7 %. The PEEK laminate built from the same fibre reaches 963 MPa in tension and 1166 MPa in flexure at 0 degrees, but those are composite values and cannot be compared with bare-fibre strength. No comparison with other Tenax grades is made, because their values were not part of the sources read for this profile.
  compare_rows:
    - label: Strength along the fibre
      benchmark: ultimate_tensile_strength
    - label: Stiffness along the fibre
      benchmark: elastic_modulus
    - label: Density
      benchmark: density
  handling:
    - Avoid creating or accumulating dust, and use eye protection where dust forms (Rave sheet, a generic thread product).
    - Keep the fibre away from strong oxidisers and peroxides (Rave sheet).
    - Check the safety data sheet for the Tenax grade you handle; none was found for HTA40 in the sources read.
  good_for:
    - Stiff, strong load paths along the fibre, where the 1.77 g/cm3 density matters (Teijin typical values).
    - Thermoplastic composite laminates with a PEEK matrix, which Teijin sells with HTA40 fabric (Teijin laminate sheet).
  watch_out:
    - All Teijin fibre values are typical values, which Teijin says are not guaranteed.
    - No HTA40 ageing, oxidation or outgassing data in the sources read.
    - The only safety data sheet read is for a different carbon thread product.
  verdict: Tenax HTA40 is a standard-modulus carbon fibre with typical values of 4100 MPa tensile strength and 240 GPa modulus at 1.77 g/cm3, according to Teijin. Its behaviour in space is not documented in the sources read, and its hazard data come from a different product.
sources:
  teijin-overview:
    title: 'Product overview: Tenax and Tenax Next filament yarn (Teijin Carbon, PDS dated 2026-04-15)'
    id: Teijin Carbon, PDS 2026-04-15, page 1 of 2
    url: https://www.teijincarbon.com/fileadmin/user_upload/Datenbl%C3%A4tter/Filament_Yarn/EU_Filament_overview.pdf
    year: 2026
    kind: datasheet
    license: manufacturer datasheet, values quoted for reference
  teijin-tsg01:
    title: 'Produktdatenblatt TSG01de: Tenax filament yarn, EU filament (Teijin Carbon Europe)'
    id: Teijin Carbon Europe, product data sheet TSG01de, dated 2025-02-15
    url: https://www.teijincarbon.com/fileadmin/user_upload/Datenbl%C3%A4tter/Filament_Yarn/Product_Data_Sheet_TSG01de__EU_Filament__de____DE_.pdf
    year: 2025
    kind: datasheet
    license: manufacturer datasheet, values quoted for reference
  teijin-tpwf-laminate:
    title: 'Product data sheet: Tenax-E TPWF PEEK-4-42-HTA40 E13 3K DT-5HS-285 (Teijin Carbon)'
    id: Teijin, product key 6200, version 1.2, dated 2022-03-01
    url: https://www.teijincarbon.com/fileadmin/user_upload/Datenbl%C3%A4tter/ThermoPlastics/TPWF/PEEK/Product_Data_Sheet_TSPTP201__6200_Tenax%E2%84%A2-E_TPWF_PEEK-4-42-HTA40_E13_3K_DT-5HS-285_.pdf
    year: 2022
    kind: datasheet
    license: manufacturer datasheet, values quoted for reference
  teijin-filament-page:
    title: 'Filament yarn page (Teijin Carbon): typical applications, product tables and processing methods'
    id: Teijin Carbon web page, read in this run
    url: https://www.teijincarbon.com/products/filament-yarn/
    year: 2026
    kind: web
    license: manufacturer web page, quoted for reference
  teijin-downloads:
    title: 'Downloads (Teijin Carbon): product data sheets, handling recommendation and certificates'
    id: Teijin Carbon web page, read in this run
    url: https://www.teijincarbon.com/downloads/
    year: 2026
    kind: web
    license: manufacturer web page, quoted for reference
  teijin-consolidated:
    title: 'Consolidated laminates (Teijin Carbon): thermoplastic products with HTA40'
    id: Teijin Carbon web page, read in this run
    url: https://www.teijincarbon.com/products/thermoplastics/consolidated-laminates/
    year: 2026
    kind: web
    license: manufacturer web page, quoted for reference
  rave-cf-sds:
    title: 'Safety data sheet: High purity carbon fibers in carbon fiber threads, SDS00170CC1016 v4.0 (Rave Scientific)'
    id: Rave Scientific, Regulation (EC) No 1907/2006 Art. 31, dated October 5th 2022; CAS 7782-42-5
    url: https://ravescientific.com/images/pdf/SDS00170CC1016-01_Carbon_Fibre.pdf
    year: 2022
    kind: datasheet
    license: supplier safety data sheet, quoted for reference
  wiki-carbon-fibre:
    title: 'Carbon fibers (Wikipedia article): definition and precursors only'
    id: Wikipedia, article Carbon fibers
    url: https://en.wikipedia.org/wiki/Carbon_fibers
    year: 2026
    kind: web
    license: CC BY-SA 4.0