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S21904 Stainless Steel vs. AWS BAu-3

S21904 stainless steel belongs to the iron alloys classification, while AWS BAu-3 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is AWS BAu-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.28
0.37
Shear Modulus, GPa 78
41
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
220

Thermal Properties

Latent Heat of Fusion, J/g 290
160
Melting Completion (Liquidus), °C 1400
1030
Melting Onset (Solidus), °C 1350
970
Specific Heat Capacity, J/kg-K 480
300
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Density, g/cm3 7.7
13

Common Calculations

Stiffness to Weight: Axial, points 14
5.0
Stiffness to Weight: Bending, points 25
13
Strength to Weight: Axial, points 25 to 36
4.9
Strength to Weight: Bending, points 23 to 29
6.4
Thermal Shock Resistance, points 15 to 21
8.7

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
60.9 to 63
Gold (Au), % 0
34.5 to 35.5
Iron (Fe), % 59.5 to 67.4
0
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
2.5 to 3.5
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.15