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AWS BAu-1 vs. R30012 Cobalt

AWS BAu-1 belongs to the otherwise unclassified metals classification, while R30012 cobalt belongs to the cobalt alloys. There are 15 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is AWS BAu-1 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 40
86
Tensile Strength: Ultimate (UTS), MPa 210
830

Thermal Properties

Latent Heat of Fusion, J/g 150
320
Melting Completion (Liquidus), °C 1020
1470
Melting Onset (Solidus), °C 990
1280
Specific Heat Capacity, J/kg-K 290
440
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Density, g/cm3 13
8.8

Common Calculations

Stiffness to Weight: Axial, points 4.7
14
Stiffness to Weight: Bending, points 12
23
Strength to Weight: Axial, points 4.5
26
Strength to Weight: Bending, points 6.1
22
Thermal Shock Resistance, points 8.5
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), % 61.9 to 63
0
Gold (Au), % 37 to 38
0
Iron (Fe), % 0
0 to 3.0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0
0 to 2.0
Tungsten (W), % 0
7.5 to 9.5
Residuals, % 0 to 0.15
0