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R30008 Cobalt vs. R30075 Cobalt

Both R30008 cobalt and R30075 cobalt are cobalt alloys. They have 68% of their average alloy composition in common. There are 22 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 R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210 to 250
Elongation at Break, % 1.1 to 73
12
Fatigue Strength, MPa 320 to 530
250 to 840
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 83
82 to 98
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
780 to 1280
Tensile Strength: Yield (Proof), MPa 500 to 1080
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1400
1360
Melting Onset (Solidus), °C 1330
1290
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.1
8.1
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 400
530

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
560 to 1410
Stiffness to Weight: Axial, points 14
14 to 17
Stiffness to Weight: Bending, points 24
24 to 25
Strength to Weight: Axial, points 31 to 56
26 to 42
Strength to Weight: Bending, points 25 to 37
22 to 31
Thermal Shock Resistance, points 25 to 44
21 to 29

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0 to 0.0010
0 to 0.010
Carbon (C), % 0 to 0.15
0 to 0.35
Chromium (Cr), % 18.5 to 21.5
27 to 30
Cobalt (Co), % 39 to 42
58.7 to 68
Iron (Fe), % 7.6 to 20
0 to 0.75
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 6.5 to 7.5
5.0 to 7.0
Nickel (Ni), % 15 to 18
0 to 0.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.015
0 to 0.020
Silicon (Si), % 0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 0
0 to 0.2

Comparable Variants