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AWS BVAu-4 vs. S21904 Stainless Steel

AWS BVAu-4 belongs to the otherwise unclassified metals classification, while S21904 stainless steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (19, 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 AWS BVAu-4 and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.4
0.28
Shear Modulus, GPa 41
78
Tensile Strength: Ultimate (UTS), MPa 190
700 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 100
290
Melting Completion (Liquidus), °C 950
1400
Melting Onset (Solidus), °C 950
1350
Specific Heat Capacity, J/kg-K 190
480
Thermal Expansion, µm/m-K 14
17

Otherwise Unclassified Properties

Density, g/cm3 17
7.7

Common Calculations

Stiffness to Weight: Axial, points 3.6
14
Stiffness to Weight: Bending, points 9.3
25
Strength to Weight: Axial, points 3.0
25 to 36
Strength to Weight: Bending, points 4.2
23 to 29
Thermal Shock Resistance, points 8.7
15 to 21

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Gold (Au), % 81.5 to 82.5
0
Iron (Fe), % 0
59.5 to 67.4
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
8.0 to 10
Nickel (Ni), % 17.5 to 18.5
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.0020
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.0010
0