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AWS BAg-18 vs. AWS BCo-1

AWS BAg-18 belongs to the otherwise unclassified metals classification, while AWS BCo-1 belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-18 and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 82
200
Poisson's Ratio 0.36
0.3
Shear Modulus, GPa 30
78
Tensile Strength: Ultimate (UTS), MPa 170
700

Thermal Properties

Brazing Temperature, °C 720 to 980
1150 to 1230
Latent Heat of Fusion, J/g 130
420
Melting Completion (Liquidus), °C 720
1150
Melting Onset (Solidus), °C 600
1120
Specific Heat Capacity, J/kg-K 280
480
Thermal Expansion, µm/m-K 19
12

Otherwise Unclassified Properties

Density, g/cm3 9.7
8.1
Embodied Carbon, kg CO2/kg material 59
8.0
Embodied Energy, MJ/kg 930
110

Common Calculations

Stiffness to Weight: Axial, points 4.7
14
Stiffness to Weight: Bending, points 15
24
Strength to Weight: Axial, points 4.9
24
Strength to Weight: Bending, points 7.0
22
Thermal Shock Resistance, points 7.7
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0
0.35 to 0.45
Chromium (Cr), % 0
18 to 20
Cobalt (Co), % 0
46 to 54
Copper (Cu), % 28.4 to 31.5
0
Iron (Fe), % 0
0 to 1.0
Nickel (Ni), % 0
16 to 18
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0
7.5 to 8.5
Silver (Ag), % 59 to 61
0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 9.5 to 10.5
0
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 0
3.5 to 4.5
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0 to 0.15
0 to 0.5