UMS40
UMS40 is a Toho Tenax (Teijin) ultra-high-modulus PAN carbon fiber supplied as F22-sized 12K and 24K tow, UD prepreg at 60 % fiber volume and fabric prepreg at 55 %.
Reference datasheet — UMS40 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the F22-12K condition
UMS40 grades and fills
UMS40 is supplied in 4 conditions, soft to hard. F22-12K is the default FabDigit quotes; the values on this page are for it.
Compare all 4 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Woven fabric epoxy laminate, ~55 vol% UMS40 | Use where quasi-balanced, drapeable high-modulus skins are needed (panels, shells) at the cost of ~40 % lower 0° stiffness than UD. | 850 | |||
UD epoxy laminate, 60 vol% UMS40 | Pick for stiffness- and dimensional-stability-critical UD laminates (booms, optical benches, reflectors); compression and impact are the design limits. | 2,400 | 1 | 105 HRM | |
epoxy-compatible sizing, 24 000 filament tow (≈800 tex) | Heavier, lower-cost tow for thick wound or pultruded stiffness-driven sections and coarse UD tapes. | 4,500 | 1.2 | ||
F22-12KDefault epoxy-compatible sizing, 12 000 filament tow (≈400 tex) | Standard supply form for prepreg, filament winding and pultrusion with epoxy/BMI matrices. | 4,560 | 1.2 |
What is UMS40?
UMS40 is a Toho Tenax (Teijin) ultra-high-modulus PAN carbon fiber supplied as F22-sized 12K and 24K tow, UD prepreg at 60 % fiber volume and fabric prepreg at 55 %. It is used in stiffness-critical aerospace and satellite laminates, combining 395 GPa modulus with 4560 MPa tensile strength at 1.79 g/cm3. The 1.15 % elongation limits bend radii, drape and impact tolerance, cost is well above standard-modulus fiber, and joints must be bonded, co-cured or bolted rather than welded. HTS40 is the cheaper standard-modulus option; P100 is the higher-modulus pitch-based alternative. UMS40 has a density of 1.79 g/cm³ (0.0647 lb/in³), heavier than 56% of composite grades. UMS40 has a tensile strength of 4,560 MPa (661 ksi), stronger than 94% of composite grades. Elongation at break is 1.2% and the elastic modulus is 395 GPa (57.3 Msi).
What is UMS40 used for?
- aircraft stiffness-critical parts
- satellite structures
- high-performance sports equipment
Advantages
- Stiff — 395 GPa (57.3 Msi), better than 96% of composite grades
- Good corrosion resistance — 90/100, better than 85% of composite grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 84% of composite grades
- High service temperature — 400°C (752 °F), better than 78% of composite grades
- Good UV / weathering resistance — 95/100, better than 78% of composite grades
Limitations
- High embodied carbon — 50 kg CO₂/kg, worse than 93% of composite grades
- Limited ductility — 1.2%, worse than 77% of composite grades
UMS40 properties
Typical room-temperature values for UMS40-F22-12K; bars are the position among composite grades.
Physical1
UMS40 has a density of 1.79 g/cm³ (0.0647 lb/in³), heavier than 56% of composite grades.
Mechanical8
UMS40 has a tensile strength of 4,560 MPa (661 ksi), stronger than 94% of composite grades. Elongation at break is 1.2% and the elastic modulus is 395 GPa (57.3 Msi).
Thermal5
UMS40 is rated for continuous service to 400°C (752 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 84% of composite grades. Thermal expansion is -1 µm/m·K (-0.556 µin/in·°F).
Electrical1
UMS40 has an electrical resistivity of 1×10⁻⁵ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), better than 85% of composite grades. UV resistance is excellent.
Sustainability4
Producing a kilogram of UMS40 takes about 700 MJ of energy and emits 50 kg of CO₂ — more than 90% of composite grades. Typical recycled content is 0%.
Manufacturability2
UMS40's machinability is poor (25/100, worse than 65% of composite grades).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the composite family
Yield strength against density for every composite grade FabDigit runs. UMS40 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with UMS40
Is UMS40 easy to machine?
Cured laminates cut with PCD/diamond-coated or diamond-grit tooling at high speed and low feed; use up-cut/down-cut compression routers and backing to avoid delamination, and capture the conductive dust.
Can UMS40 be welded?
Not weldable — joints are made by co-curing, structural film/paste adhesive bonding or bolted metallic fittings (isolate from Al/steel with glass ply to avoid galvanic corrosion).
Can UMS40 be formed, bent or molded?
Processed as UD/woven prepreg (autoclave 120–180 °C cure), filament winding, AFP or RTM; the low strain-to-failure and high modulus mean generous fibre radii, careful tow tension and low-friction tooling paths.
UMS40 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| nitrogen (N)residual from PAN precursor | ≤ 1 | 0.4 |
| epoxy-compatible sizing (F22)surface size, wt% of fiber | 0.7 – 1.5 | 1 |
| carbon (C)graphitized PAN-based fiber | ≥ 98 (balance) |
What surface finishes work on UMS40?
Peel-ply or resin-rich surface plies then sand/fill/prime; UV-resistant topcoat or paint is required since the epoxy matrix chalks, and edges should be sealed against moisture ingress.
How much does UMS40 cost?
UMS40 is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
UMS40 — frequently asked
What is UMS40 used for?
UMS40 is typically used for aircraft stiffness-critical parts, satellite structures and high-performance sports equipment. In short: 395 GPa PAN fiber; stiffness-critical aerospace laminates; low strain to failure.
What is the tensile strength of UMS40?
UMS40 has a typical tensile strength of 4,560 MPa (661 ksi) — stronger than 94% of composite grades. Strength varies by condition: see the 4 listed tempers.
Is UMS40 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 65% of composite grades). Cured laminates cut with PCD/diamond-coated or diamond-grit tooling at high speed and low feed; use up-cut/down-cut compression routers and backing to avoid delamination, and capture the conductive dust.
Can UMS40 be welded?
Not weldable — joints are made by co-curing, structural film/paste adhesive bonding or bolted metallic fittings (isolate from Al/steel with glass ply to avoid galvanic corrosion).
What surface finishes work on UMS40?
Peel-ply or resin-rich surface plies then sand/fill/prime; UV-resistant topcoat or paint is required since the epoxy matrix chalks, and edges should be sealed against moisture ingress.
Can UMS40 be formed, bent or molded?
Processed as UD/woven prepreg (autoclave 120–180 °C cure), filament winding, AFP or RTM; the low strain-to-failure and high modulus mean generous fibre radii, careful tow tension and low-friction tooling paths.
What is the maximum service temperature of UMS40?
UMS40 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does UMS40 cost?
UMS40 is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Tenax filament yarn product data sheet (UMS40 F22) — Teijin Carbon Europe GmbH (2023)
- ISO 11566 — Carbon fibre: determination of tensile properties of single-filament specimens — ISO (1996)
- ISO 10618 — Carbon fibre: determination of tensile properties of resin-impregnated yarn — ISO (2004)
- ASM Handbook Vol. 21: Composites — ASM International (2001)
- MMPDS / CMH-17 typical carbon/epoxy lamina data — CMH-17 / Battelle (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.