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ASTM A302 Alloy Steel vs. AWS E312

Both ASTM A302 alloy steel and AWS E312 are iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is AWS E312.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 23
25
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 590 to 620
740

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
20
Density, g/cm3 7.8 to 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
3.6
Embodied Energy, MJ/kg 20 to 21
52
Embodied Water, L/kg 48 to 50
200

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 22
27
Strength to Weight: Bending, points 20 to 21
24
Thermal Shock Resistance, points 17 to 18
18