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ASTM A387 Grade 12 Steel vs. AWS E383

Both ASTM A387 grade 12 steel and AWS E383 are iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is AWS E383.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 25
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 470 to 520
580

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
12
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
37
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.6
6.4
Embodied Energy, MJ/kg 21
89
Embodied Water, L/kg 51
240

Common Calculations

PREN (Pitting Resistance) 2.7
40
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
20
Strength to Weight: Bending, points 17 to 18
19
Thermal Diffusivity, mm2/s 12
3.1
Thermal Shock Resistance, points 14 to 15
15

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.030
Chromium (Cr), % 0.8 to 1.2
26.5 to 29
Copper (Cu), % 0
0.6 to 1.5
Iron (Fe), % 97 to 98.2
28.8 to 39.2
Manganese (Mn), % 0.4 to 0.65
0.5 to 2.5
Molybdenum (Mo), % 0.45 to 0.6
3.2 to 4.2
Nickel (Ni), % 0
30 to 33
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0.15 to 0.4
0 to 0.9
Sulfur (S), % 0 to 0.025
0 to 0.020