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ASTM A387 Grade 12 Steel vs. AWS BAg-1a

ASTM A387 grade 12 steel belongs to the iron alloys classification, while AWS BAg-1a belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (16, 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 BAg-1a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
77
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
29
Tensile Strength: Ultimate (UTS), MPa 470 to 520
180

Thermal Properties

Latent Heat of Fusion, J/g 250
120
Melting Completion (Liquidus), °C 1470
640
Melting Onset (Solidus), °C 1420
630
Specific Heat Capacity, J/kg-K 470
280
Thermal Expansion, µm/m-K 13
22

Otherwise Unclassified Properties

Density, g/cm3 7.8
9.3
Embodied Carbon, kg CO2/kg material 1.6
48
Embodied Energy, MJ/kg 21
760

Common Calculations

Stiffness to Weight: Axial, points 13
4.6
Stiffness to Weight: Bending, points 24
15
Strength to Weight: Axial, points 16 to 18
5.4
Strength to Weight: Bending, points 17 to 18
7.6
Thermal Shock Resistance, points 14 to 15
7.5

Alloy Composition


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Cadmium (Cd), % 0
17 to 19
Carbon (C), % 0.050 to 0.17
0
Chromium (Cr), % 0.8 to 1.2
0
Copper (Cu), % 0
14.5 to 16.5
Iron (Fe), % 97 to 98.2
0
Manganese (Mn), % 0.4 to 0.65
0
Molybdenum (Mo), % 0.45 to 0.6
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.15 to 0.4
0
Silver (Ag), % 0
49 to 51
Sulfur (S), % 0 to 0.025
0
Zinc (Zn), % 0
14.5 to 18.5
Residuals, % 0
0 to 0.15