9Ni-4Co-0.20C Steel

Verifiedmetal

9Ni-4Co-0.20C is a high-strength, low-alloy steel designed for cryogenic applications, combining nickel and cobalt additions to maintain toughness at extremely low temperatures while the moderate carbon content provides strength. The Q&T (quenched and tempered) condition delivers yield strengths typically 1,380–1,550 MPa with excellent fracture toughness and impact resistance down to liquid helium temperatures, making it suitable for aerospace propellant tankage and cryogenic pressure vessels.

aerospacestructural

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Tempers & Conditions

Q&T

Units:

si imperial

1 interactive curve for this material

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Property	Value	Unit	Conditions
Compressive Modulus(Ec)2 entries	198.6	GPa	22°C · Plate
↳	Curve (19 pts)	Pa	—
Poisson's Ratio(ν)	0.3000	-	22°C
Shear Modulus(G)	76.53	GPa	22°C · Plate
Young's Modulus(E)	198.6	GPa	22°C · Plate

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Density(ρ)	7.833	kg/m³	22°C

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Regulatory Screening

Environmental

Quality & Standards

Industry-Specific

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.