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ASTM A387 Grade 12 Steel vs. AWS E3155

Both ASTM A387 grade 12 steel and AWS E3155 are iron alloys. They have a modest 32% 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 E3155.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 25
23
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 470 to 520
770

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 44
13
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 1.6
7.7
Embodied Energy, MJ/kg 21
110
Embodied Water, L/kg 51
300

Common Calculations

PREN (Pitting Resistance) 2.7
35
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
26
Strength to Weight: Bending, points 17 to 18
22
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 14 to 15
20

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.1
Chromium (Cr), % 0.8 to 1.2
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 97 to 98.2
23.3 to 36.3
Manganese (Mn), % 0.4 to 0.65
1.0 to 2.5
Molybdenum (Mo), % 0.45 to 0.6
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
2.0 to 3.0