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R30008 Cobalt vs. AWS ERNiCu-7

R30008 cobalt belongs to the cobalt alloys classification, while AWS ERNiCu-7 belongs to the nickel alloys. There are 20 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 R30008 cobalt and the bottom bar is AWS ERNiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
160
Elongation at Break, % 1.1 to 73
34
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 83
61
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
550

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1400
1280
Melting Onset (Solidus), °C 1330
1240
Specific Heat Capacity, J/kg-K 450
440
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 95
50
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 400
250

Common Calculations

Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 31 to 56
18
Strength to Weight: Bending, points 25 to 37
17
Thermal Shock Resistance, points 25 to 44
19

Alloy Composition

Aluminum (Al), % 0
0 to 1.3
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0 to 0.15
Chromium (Cr), % 18.5 to 21.5
0
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
18.3 to 36.5
Iron (Fe), % 7.6 to 20
0 to 2.5
Manganese (Mn), % 1.0 to 2.0
0 to 4.0
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 15 to 18
62 to 69
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 1.2
0 to 1.3
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
1.5 to 3.0
Residuals, % 0
0 to 0.5