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SAE-AISI S2 Steel vs. AWS BAu-4

SAE-AISI S2 steel belongs to the iron alloys classification, while AWS BAu-4 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is SAE-AISI S2 steel and the bottom bar is AWS BAu-4.

SAE-AISI S2 (T41902) Shock-Resisting SteelAWS BAu-4 (P00820) Filler Metal
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 72
41
Tensile Strength: Ultimate (UTS), MPa 670 to 1940
200

Thermal Properties

Latent Heat of Fusion, J/g 260
100
Melting Completion (Liquidus), °C 1450
950
Melting Onset (Solidus), °C 1410
950
Specific Heat Capacity, J/kg-K 470
190
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Density, g/cm3 7.8
17

Common Calculations

Stiffness to Weight: Axial, points 13
3.6
Stiffness to Weight: Bending, points 24
9.3
Strength to Weight: Axial, points 24 to 69
3.2
Strength to Weight: Bending, points 22 to 44
4.4
Thermal Shock Resistance, points 23 to 68
9.2

Alloy Composition

Carbon (C), % 0.4 to 0.55
0
Copper (Cu), % 0 to 0.25
0
Gold (Au), % 0
81.5 to 82.5
Iron (Fe), % 96 to 98.1
0
Manganese (Mn), % 0.3 to 0.5
0
Molybdenum (Mo), % 0.3 to 0.6
0
Nickel (Ni), % 0 to 0.3
17.4 to 18.5
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.9 to 1.2
0
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0 to 0.5
0
Residuals, % 0
0 to 0.15