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AWS BAg-18 vs. R30008 Cobalt

AWS BAg-18 belongs to the otherwise unclassified metals classification, while R30008 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-18 and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 82
210
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 30
83
Tensile Strength: Ultimate (UTS), MPa 170
950 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 130
320
Melting Completion (Liquidus), °C 720
1400
Melting Onset (Solidus), °C 600
1330
Specific Heat Capacity, J/kg-K 280
450
Thermal Expansion, µm/m-K 19
13

Otherwise Unclassified Properties

Density, g/cm3 9.7
8.4
Embodied Carbon, kg CO2/kg material 59
8.1
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
31 to 56
Strength to Weight: Bending, points 7.0
25 to 37
Thermal Shock Resistance, points 7.7
25 to 44

Alloy Composition


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Boron (B), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Copper (Cu), % 28.4 to 31.5
0
Iron (Fe), % 0
7.6 to 20
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Silver (Ag), % 59 to 61
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 9.5 to 10.5
0
Residuals, % 0 to 0.15
0