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R31537 Cobalt vs. R30001 Cobalt

Both R31537 cobalt and R30001 cobalt are cobalt alloys. They have 81% of their average alloy composition in common. There are 24 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 R31537 cobalt and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 14 to 23
1.0
Poisson's Ratio 0.29
0.28
Rockwell C Hardness 25 to 35
55
Shear Modulus, GPa 87
86
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
620

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1360
1530
Melting Onset (Solidus), °C 1290
1260
Specific Heat Capacity, J/kg-K 450
430
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 13
11

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.0
Embodied Carbon, kg CO2/kg material 8.1
8.9
Embodied Energy, MJ/kg 110
130
Embodied Water, L/kg 530
460

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 33 to 44
19
Strength to Weight: Bending, points 26 to 32
18
Thermal Diffusivity, mm2/s 3.4
3.7
Thermal Shock Resistance, points 24 to 32
19

Alloy Composition

Carbon (C), % 0 to 0.14
2.0 to 3.0
Chromium (Cr), % 26 to 30
28 to 32
Cobalt (Co), % 58.9 to 69
43 to 59
Iron (Fe), % 0 to 0.75
0 to 3.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0 to 1.0
Nickel (Ni), % 0 to 1.0
0 to 3.0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Tungsten (W), % 0
11 to 13