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R30075 Cobalt vs. AWS ERNiCu-7

R30075 cobalt belongs to the cobalt alloys classification, while AWS ERNiCu-7 belongs to the nickel alloys. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is AWS ERNiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
160
Elongation at Break, % 12
34
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 82 to 98
61
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
550

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
1280
Melting Onset (Solidus), °C 1290
1240
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
20
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.7
Embodied Carbon, kg CO2/kg material 8.1
8.5
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 530
250

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
10
Stiffness to Weight: Bending, points 24 to 25
21
Strength to Weight: Axial, points 26 to 42
18
Strength to Weight: Bending, points 22 to 31
17
Thermal Diffusivity, mm2/s 3.5
5.3
Thermal Shock Resistance, points 21 to 29
19

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 1.3
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.15
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
18.3 to 36.5
Iron (Fe), % 0 to 0.75
0 to 2.5
Manganese (Mn), % 0 to 1.0
0 to 4.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
62 to 69
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.3
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0 to 0.1
1.5 to 3.0
Tungsten (W), % 0 to 0.2
0
Residuals, % 0
0 to 0.5