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ASTM B631 Class A vs. ASTM Grade HL Steel

ASTM B631 class A belongs to the otherwise unclassified metals classification, while ASTM grade HL steel belongs to the iron alloys. There are 12 material properties with values for both materials. Properties with values for just one material (21, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 85 to 86
80

Thermal Properties

Latent Heat of Fusion, J/g 160
320
Melting Completion (Liquidus), °C 2680 to 2690
1390
Specific Heat Capacity, J/kg-K 160
490
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Density, g/cm3 15
7.8
Embodied Carbon, kg CO2/kg material 43
4.5
Embodied Energy, MJ/kg 670
65

Common Calculations

Stiffness to Weight: Axial, points 8.5
14
Stiffness to Weight: Bending, points 14
25