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AWS BAu-3 vs. S31727 Stainless Steel

AWS BAu-3 belongs to the otherwise unclassified metals classification, while S31727 stainless steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is AWS BAu-3 and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 41
78
Tensile Strength: Ultimate (UTS), MPa 220
630

Thermal Properties

Latent Heat of Fusion, J/g 160
290
Melting Completion (Liquidus), °C 1030
1440
Melting Onset (Solidus), °C 970
1390
Specific Heat Capacity, J/kg-K 300
470
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Density, g/cm3 13
8.0

Common Calculations

Stiffness to Weight: Axial, points 5.0
14
Stiffness to Weight: Bending, points 13
24
Strength to Weight: Axial, points 4.9
22
Strength to Weight: Bending, points 6.4
20
Thermal Shock Resistance, points 8.7
14

Alloy Composition

Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 60.9 to 63
2.8 to 4.0
Gold (Au), % 34.5 to 35.5
0
Iron (Fe), % 0
53.7 to 61.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 2.5 to 3.5
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.15
0