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AWS BVAg-31 vs. S21800 Stainless Steel

AWS BVAg-31 belongs to the otherwise unclassified metals classification, while S21800 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 BVAg-31 and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 90
190
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 33
75
Tensile Strength: Ultimate (UTS), MPa 180
740

Thermal Properties

Latent Heat of Fusion, J/g 150
340
Melting Completion (Liquidus), °C 850
1360
Melting Onset (Solidus), °C 820
1310
Specific Heat Capacity, J/kg-K 280
500
Thermal Expansion, µm/m-K 18
16

Otherwise Unclassified Properties

Density, g/cm3 10
7.5

Common Calculations

Stiffness to Weight: Axial, points 4.9
14
Stiffness to Weight: Bending, points 15
26
Strength to Weight: Axial, points 4.9
27
Strength to Weight: Bending, points 7.0
24
Thermal Shock Resistance, points 7.8
17

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0 to 0.1
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 31 to 33
0
Iron (Fe), % 0
59.1 to 65.4
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
7.0 to 9.0
Nickel (Ni), % 0
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Palladium (Pd), % 8.0 to 12
0
Phosphorus (P), % 0 to 0.0020
0 to 0.060
Silicon (Si), % 0
3.5 to 4.5
Silver (Ag), % 57 to 59
0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.0010
0