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AWS BAg-28 vs. R30816 Cobalt

AWS BAg-28 belongs to the otherwise unclassified metals classification, while R30816 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-28 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 88
210
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 33
81
Tensile Strength: Ultimate (UTS), MPa 150
1020

Thermal Properties

Latent Heat of Fusion, J/g 140
300
Melting Completion (Liquidus), °C 710
1540
Melting Onset (Solidus), °C 650
1460
Specific Heat Capacity, J/kg-K 320
420
Thermal Expansion, µm/m-K 21
12

Otherwise Unclassified Properties

Density, g/cm3 8.9
9.1
Embodied Carbon, kg CO2/kg material 40
20
Embodied Energy, MJ/kg 630
320

Common Calculations

Stiffness to Weight: Axial, points 5.6
13
Stiffness to Weight: Bending, points 17
22
Strength to Weight: Axial, points 4.7
31
Strength to Weight: Bending, points 7.1
25
Thermal Shock Resistance, points 5.8
28

Alloy Composition

Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 29 to 31
0
Iron (Fe), % 0
0 to 5.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 39 to 41
0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tin (Sn), % 1.5 to 2.5
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 26 to 30
0
Residuals, % 0 to 0.15
0