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R31233 Cobalt vs. SAE-AISI M47 Steel

R31233 cobalt belongs to the cobalt alloys classification, while SAE-AISI M47 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is SAE-AISI M47 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 1020
810 to 2310

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1350
1540
Melting Onset (Solidus), °C 1330
1500
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 12
23
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.1
Embodied Carbon, kg CO2/kg material 8.4
7.4
Embodied Energy, MJ/kg 110
100
Embodied Water, L/kg 480
120

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
28 to 79
Strength to Weight: Bending, points 26
24 to 48
Thermal Diffusivity, mm2/s 3.2
6.3
Thermal Shock Resistance, points 25
27 to 77

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
1.1 to 1.2
Chromium (Cr), % 23.5 to 27.5
3.5 to 4.0
Cobalt (Co), % 44.7 to 63.3
4.8 to 5.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 1.0 to 5.0
78.7 to 85
Manganese (Mn), % 0.1 to 1.5
0.15 to 0.4
Molybdenum (Mo), % 4.0 to 6.0
9.3 to 10
Nickel (Ni), % 7.0 to 11
0 to 0.3
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.050 to 1.0
0.2 to 0.45
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 1.0 to 3.0
1.3 to 1.8
Vanadium (V), % 0
1.2 to 1.4