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AWS BAg-21 vs. AWS BAg-9

Both AWS BAg-21 and AWS BAg-9 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-21 and the bottom bar is AWS BAg-9.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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