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R30075 Cobalt vs. AWS E630

R30075 cobalt belongs to the cobalt alloys classification, while AWS E630 belongs to the iron alloys. There are 23 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 R30075 cobalt and the bottom bar is AWS E630.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Elongation at Break, % 12
8.0
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 82 to 98
76
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
1040

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1290
1380
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
17
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.1
2.8
Embodied Energy, MJ/kg 110
40
Embodied Water, L/kg 530
140

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
25
Strength to Weight: Axial, points 26 to 42
37
Strength to Weight: Bending, points 22 to 31
29
Thermal Diffusivity, mm2/s 3.5
4.5
Thermal Shock Resistance, points 21 to 29
28

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.050
Chromium (Cr), % 27 to 30
16 to 16.8
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
3.3 to 4.0
Iron (Fe), % 0 to 0.75
71.6 to 75.9
Manganese (Mn), % 0 to 1.0
0.25 to 0.75
Molybdenum (Mo), % 5.0 to 7.0
0 to 0.75
Nickel (Ni), % 0 to 0.5
4.5 to 5.0
Niobium (Nb), % 0
0.15 to 0.3
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0