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AWS BAg-21 vs. R30012 Cobalt

AWS BAg-21 belongs to the otherwise unclassified metals classification, while R30012 cobalt belongs to the cobalt alloys. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-21 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 85
220
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 31
86
Tensile Strength: Ultimate (UTS), MPa 150
830

Thermal Properties

Latent Heat of Fusion, J/g 140
320
Melting Completion (Liquidus), °C 800
1470
Melting Onset (Solidus), °C 690
1280
Specific Heat Capacity, J/kg-K 280
440
Thermal Expansion, µm/m-K 19
12

Otherwise Unclassified Properties

Density, g/cm3 9.8
8.8
Embodied Energy, MJ/kg 970
120

Common Calculations

Stiffness to Weight: Axial, points 4.8
14
Stiffness to Weight: Bending, points 15
23
Strength to Weight: Axial, points 4.2
26
Strength to Weight: Bending, points 6.4
22
Thermal Shock Resistance, points 6.6
23

Alloy Composition


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Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 27.5 to 29.5
0
Iron (Fe), % 0
0 to 3.0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 2.0 to 3.0
0 to 3.0
Silicon (Si), % 0
0 to 2.0
Silver (Ag), % 62 to 64
0
Tin (Sn), % 5.0 to 7.0
0
Tungsten (W), % 0
7.5 to 9.5
Residuals, % 0 to 0.15
0