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R30012 Cobalt vs. R30075 Cobalt

Both R30012 cobalt and R30075 cobalt are cobalt alloys. They have 86% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210 to 250
Elongation at Break, % 1.0
12
Fatigue Strength, MPa 320
250 to 840
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
82 to 98
Tensile Strength: Ultimate (UTS), MPa 830
780 to 1280
Tensile Strength: Yield (Proof), MPa 650
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1470
1360
Melting Onset (Solidus), °C 1280
1290
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.4
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 120
110
Embodied Water, L/kg 480
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 960
560 to 1410
Stiffness to Weight: Axial, points 14
14 to 17
Stiffness to Weight: Bending, points 23
24 to 25
Strength to Weight: Axial, points 26
26 to 42
Strength to Weight: Bending, points 22
22 to 31
Thermal Diffusivity, mm2/s 3.8
3.5
Thermal Shock Resistance, points 23
21 to 29

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 1.4 to 2.0
0 to 0.35
Chromium (Cr), % 27 to 32
27 to 30
Cobalt (Co), % 47.5 to 64.1
58.7 to 68
Iron (Fe), % 0 to 3.0
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
5.0 to 7.0
Nickel (Ni), % 0 to 3.0
0 to 0.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 7.5 to 9.5
0 to 0.2