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ASTM Grade HK Steel vs. ASTM B631 Class B

ASTM grade HK steel belongs to the iron alloys classification, while ASTM B631 class B belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HK steel and the bottom bar is ASTM B631 class B.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.27
0.31
Shear Modulus, GPa 79
78 to 79

Thermal Properties

Latent Heat of Fusion, J/g 310
150
Melting Completion (Liquidus), °C 1400
2460 to 2480
Specific Heat Capacity, J/kg-K 480
170
Thermal Conductivity, W/m-K 15
450
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
50 to 53
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
32 to 34

Otherwise Unclassified Properties

Density, g/cm3 7.8
14
Embodied Carbon, kg CO2/kg material 4.4
49
Embodied Energy, MJ/kg 63
760

Common Calculations

Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 25
14
Thermal Diffusivity, mm2/s 3.9
190