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AWS BAg-28 vs. AWS BAg-18

Both AWS BAg-28 and AWS BAg-18 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 72% of their average alloy composition in common.

For each property being compared, the top bar is AWS BAg-28 and the bottom bar is AWS BAg-18.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 88
82
Poisson's Ratio 0.33
0.36
Shear Modulus, GPa 33
30
Tensile Strength: Ultimate (UTS), MPa 150
170

Thermal Properties

Brazing Temperature, °C 680 to 840
720 to 980
Latent Heat of Fusion, J/g 140
130
Melting Completion (Liquidus), °C 710
720
Melting Onset (Solidus), °C 650
600
Specific Heat Capacity, J/kg-K 320
280
Thermal Expansion, µm/m-K 21
19

Otherwise Unclassified Properties

Density, g/cm3 8.9
9.7
Embodied Carbon, kg CO2/kg material 40
59
Embodied Energy, MJ/kg 630
930

Common Calculations

Stiffness to Weight: Axial, points 5.6
4.7
Stiffness to Weight: Bending, points 17
15
Strength to Weight: Axial, points 4.7
4.9
Strength to Weight: Bending, points 7.1
7.0
Thermal Shock Resistance, points 5.8
7.7

Alloy Composition

Copper (Cu), % 29 to 31
28.4 to 31.5
Silver (Ag), % 39 to 41
59 to 61
Tin (Sn), % 1.5 to 2.5
9.5 to 10.5
Zinc (Zn), % 26 to 30
0
Residuals, % 0
0 to 0.15