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AWS BAg-21 vs. ACI-ASTM CG8M Steel

AWS BAg-21 belongs to the otherwise unclassified metals classification, while ACI-ASTM CG8M steel belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-21 and the bottom bar is ACI-ASTM CG8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 85
200
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 31
79
Tensile Strength: Ultimate (UTS), MPa 150
550

Thermal Properties

Latent Heat of Fusion, J/g 140
300
Melting Completion (Liquidus), °C 800
1450
Melting Onset (Solidus), °C 690
1400
Specific Heat Capacity, J/kg-K 280
470
Thermal Expansion, µm/m-K 19
16

Otherwise Unclassified Properties

Density, g/cm3 9.8
7.9
Embodied Energy, MJ/kg 970
56

Common Calculations

Stiffness to Weight: Axial, points 4.8
14
Stiffness to Weight: Bending, points 15
25
Strength to Weight: Axial, points 4.2
19
Strength to Weight: Bending, points 6.4
19
Thermal Shock Resistance, points 6.6
12

Alloy Composition


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Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 27.5 to 29.5
0
Iron (Fe), % 0
58.8 to 70
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 2.0 to 3.0
9.0 to 13
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.5
Silver (Ag), % 62 to 64
0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 5.0 to 7.0
0
Residuals, % 0 to 0.15
0