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R30001 Cobalt vs. SAE-AISI 9310 Steel

R30001 cobalt belongs to the cobalt alloys classification, while SAE-AISI 9310 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is SAE-AISI 9310 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
17 to 19
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 620
820 to 910

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Melting Completion (Liquidus), °C 1530
1460
Melting Onset (Solidus), °C 1260
1420
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.9

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 8.9
1.8
Embodied Energy, MJ/kg 130
24
Embodied Water, L/kg 460
57

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 19
29 to 32
Strength to Weight: Bending, points 18
25 to 27
Thermal Diffusivity, mm2/s 3.7
13
Thermal Shock Resistance, points 19
24 to 27

Alloy Composition

Carbon (C), % 2.0 to 3.0
0.080 to 0.13
Chromium (Cr), % 28 to 32
1.0 to 1.4
Cobalt (Co), % 43 to 59
0
Iron (Fe), % 0 to 3.0
93.8 to 95.2
Manganese (Mn), % 0
0.45 to 0.65
Molybdenum (Mo), % 0 to 1.0
0.080 to 0.15
Nickel (Ni), % 0 to 3.0
3.0 to 3.5
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 2.0
0.2 to 0.35
Sulfur (S), % 0
0 to 0.012
Tungsten (W), % 11 to 13
0