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SAE-AISI A9 Steel vs. AWS BAg-2a

SAE-AISI A9 steel belongs to the iron alloys classification, while AWS BAg-2a belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is AWS BAg-2a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
83
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 74
31
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
170

Thermal Properties

Latent Heat of Fusion, J/g 280
130
Melting Completion (Liquidus), °C 1460
710
Melting Onset (Solidus), °C 1410
610
Specific Heat Capacity, J/kg-K 470
310
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 4.7
30
Embodied Energy, MJ/kg 70
470

Common Calculations

Stiffness to Weight: Axial, points 14
5.2
Stiffness to Weight: Bending, points 25
17
Strength to Weight: Axial, points 28 to 73
5.4
Strength to Weight: Bending, points 24 to 46
7.8
Thermal Shock Resistance, points 25 to 66
6.5

Alloy Composition


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Cadmium (Cd), % 0
19 to 21
Carbon (C), % 0.45 to 0.55
0
Chromium (Cr), % 4.8 to 5.5
0
Copper (Cu), % 0 to 0.25
26 to 28
Iron (Fe), % 87 to 90.5
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 1.3 to 1.8
0
Nickel (Ni), % 1.3 to 1.8
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 1.0 to 1.2
0
Silver (Ag), % 0
29 to 31
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.8 to 1.4
0
Zinc (Zn), % 0
21 to 25
Residuals, % 0
0 to 0.15