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G-CoCr28 Cobalt vs. AWS E630

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AWS E630 belongs to the iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is AWS E630.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 6.7
8.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
76
Tensile Strength: Ultimate (UTS), MPa 560
1040

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1330
1430
Melting Onset (Solidus), °C 1270
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 8.5
17
Thermal Expansion, µm/m-K 14
14

Otherwise Unclassified Properties

Base Metal Price, % relative 100
14
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.2
2.8
Embodied Energy, MJ/kg 84
40
Embodied Water, L/kg 440
140

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
37
Strength to Weight: Bending, points 19
29
Thermal Diffusivity, mm2/s 2.2
4.5
Thermal Shock Resistance, points 14
28

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.050
Chromium (Cr), % 27 to 30
16 to 16.8
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
3.3 to 4.0
Iron (Fe), % 9.7 to 24.5
71.6 to 75.9
Manganese (Mn), % 0 to 1.5
0.25 to 0.75
Molybdenum (Mo), % 0 to 0.5
0 to 0.75
Nickel (Ni), % 0 to 4.0
4.5 to 5.0
Niobium (Nb), % 0 to 0.5
0.15 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030