ACI-ASTM CA40 (SCS2A, J91153) Cast Stainless Steel

ACI-ASTM CA40 is an alloy of iron, further classified as a martensitic stainless steel. It is typically furnished in the normalized and tempered condition. CA40 is the ACI-ASTM designation for this material. J91153 is the UNS number.

Material Properties

Density7.6 g/cm3 (470 lb/ft3)

Elastic (Young's, Tensile) Modulus200 GPa (29 x 106 psi)

Electrical Conductivity3.0 % IACS

Electrical Resistivity Order of Magnitude-6 10x Ω-m

Elongation at Break10 %

Melting Onset (Solidus)1500 °C (2730 °F)

Specific Heat Capacity460 J/kg-K

Strength to Weight Ratio120 kN-m/kg

Tensile Strength: Ultimate (UTS)910 MPa (130 x 103 psi)

Tensile Strength: Yield (Proof)860 MPa (120 x 103 psi)

Thermal Conductivity25 W/m-K

Thermal Diffusivity7.2

Thermal Expansion10 µm/m-K

Further Reading

ASTM A743: Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application