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AWS BAg-7 vs. AWS BAg-13a

Both AWS BAg-7 and AWS BAg-13a are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 78% of their average alloy composition in common.

For each property being compared, the top bar is AWS BAg-7 and the bottom bar is AWS BAg-13a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
92
Poisson's Ratio 0.34
0.36
Shear Modulus, GPa 31
34
Tensile Strength: Ultimate (UTS), MPa 150
180

Thermal Properties

Brazing Temperature, °C 650 to 900
720 to 980
Latent Heat of Fusion, J/g 130
160
Melting Completion (Liquidus), °C 650
890
Melting Onset (Solidus), °C 620
770
Specific Heat Capacity, J/kg-K 290
300
Thermal Expansion, µm/m-K 20
19

Otherwise Unclassified Properties

Density, g/cm3 9.3
9.8
Embodied Carbon, kg CO2/kg material 55
54
Embodied Energy, MJ/kg 860
850

Common Calculations

Stiffness to Weight: Axial, points 4.9
5.2
Stiffness to Weight: Bending, points 16
15
Strength to Weight: Axial, points 4.5
5.1
Strength to Weight: Bending, points 6.7
7.2
Thermal Shock Resistance, points 6.4
7.5

Alloy Composition


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Copper (Cu), % 21 to 23
40.4 to 43.5
Nickel (Ni), % 0
1.5 to 2.5
Silver (Ag), % 55 to 57
55 to 57
Tin (Sn), % 4.5 to 5.5
0
Zinc (Zn), % 15 to 19
0
Residuals, % 0 to 0.15
0 to 0.15