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AWS BAg-9 vs. AWS BAg-21

Both AWS BAg-9 and AWS BAg-21 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 83% of their average alloy composition in common.

For each property being compared, the top bar is AWS BAg-9 and the bottom bar is AWS BAg-21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 82
85
Poisson's Ratio 0.35
0.36
Shear Modulus, GPa 31
31
Tensile Strength: Ultimate (UTS), MPa 140
150

Thermal Properties

Brazing Temperature, °C 720 to 840
700 to 900
Latent Heat of Fusion, J/g 130
140
Melting Completion (Liquidus), °C 720
800
Melting Onset (Solidus), °C 670
690
Specific Heat Capacity, J/kg-K 290
280
Thermal Expansion, µm/m-K 20
19

Otherwise Unclassified Properties

Density, g/cm3 9.6
9.8
Embodied Energy, MJ/kg 980
970

Common Calculations

Stiffness to Weight: Axial, points 4.8
4.8
Stiffness to Weight: Bending, points 15
15
Strength to Weight: Axial, points 4.1
4.2
Strength to Weight: Bending, points 6.3
6.4
Thermal Shock Resistance, points 6.0
6.6

Alloy Composition


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Copper (Cu), % 19 to 21
27.5 to 29.5
Nickel (Ni), % 0
2.0 to 3.0
Silver (Ag), % 64 to 66
62 to 64
Tin (Sn), % 0
5.0 to 7.0
Zinc (Zn), % 13 to 17
0
Residuals, % 0 to 0.15
0 to 0.15