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Half-Hard K94200 Alloy

Half-hard K94200 is K94200 alloy in the half-hard temper. The graph bars on the material properties cards below compare half-hard K94200 to: low-expansion iron alloys (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

140 GPa 21 x 106 psi

Elongation at Break

5.0 %

Poisson's Ratio

0.34

Shear Modulus

54 GPa 7.8 x 106 psi

Shear Strength

410 MPa 60 x 103 psi

Tensile Strength: Ultimate (UTS)

710 MPa 100 x 103 psi

Tensile Strength: Yield (Proof)

650 MPa 94 x 103 psi

Thermal Properties

Curie Temperature

350 °C 660 °F

Melting Onset (Solidus)

1440 °C 2620 °F

Specific Heat Capacity

500 J/kg-K 0.12 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.7 BTU/h-ft-°F

Thermal Expansion

5.0 µm/m-K

Other Material Properties

Density

8.2 g/cm3 510 lb/ft3

Electrical Conductivity: Equal Volume

2.7 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.0 % IACS

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

35 MJ/m3

Resilience: Unit (Modulus of Resilience)

1460 kJ/m3

Stiffness to Weight: Axial

9.8 points

Stiffness to Weight: Bending

21 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

3.7 mm2/s

Thermal Shock Resistance

70 points

Followup Questions

Further Reading

Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993

Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005