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ASTM B631 Class C vs. AWS E308H

ASTM B631 class C belongs to the otherwise unclassified metals classification, while AWS E308H belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class C and the bottom bar is AWS E308H.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180 to 190
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 66 to 71
77

Thermal Properties

Latent Heat of Fusion, J/g 140 to 150
290
Melting Completion (Liquidus), °C 2090 to 2230
1420
Specific Heat Capacity, J/kg-K 180
480
Thermal Conductivity, W/m-K 450 to 490
16
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 55 to 63
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 36 to 43
2.5

Otherwise Unclassified Properties

Density, g/cm3 13 to 14
7.8
Embodied Carbon, kg CO2/kg material 55 to 59
3.2
Embodied Energy, MJ/kg 860 to 920
46

Common Calculations

Stiffness to Weight: Axial, points 7.4 to 7.6
14
Stiffness to Weight: Bending, points 14
25
Thermal Diffusivity, mm2/s 180 to 200
4.2