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AWS BAg-21 vs. ASTM B685 Alloy

Both AWS BAg-21 and ASTM B685 alloy are otherwise unclassified metals. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 15 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-21 and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 85
120
Poisson's Ratio 0.36
0.37
Shear Modulus, GPa 31
43
Tensile Strength: Ultimate (UTS), MPa 150
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 140
180
Melting Completion (Liquidus), °C 800
1230
Melting Onset (Solidus), °C 690
1200
Specific Heat Capacity, J/kg-K 280
300
Thermal Expansion, µm/m-K 19
14

Otherwise Unclassified Properties

Density, g/cm3 9.8
11

Common Calculations

Stiffness to Weight: Axial, points 4.8
6.1
Stiffness to Weight: Bending, points 15
15
Strength to Weight: Axial, points 4.2
17 to 27
Strength to Weight: Bending, points 6.4
16 to 21
Thermal Shock Resistance, points 6.6
28 to 46

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 27.5 to 29.5
39.5 to 40.5
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Nickel (Ni), % 2.0 to 3.0
0
Palladium (Pd), % 0
59 to 60.5
Silver (Ag), % 62 to 64
0 to 0.1
Tin (Sn), % 5.0 to 7.0
0
Zinc (Zn), % 0
0 to 0.060
Residuals, % 0 to 0.15
0 to 0.2