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SAE-AISI M62 Steel vs. R31538 Cobalt

SAE-AISI M62 steel belongs to the iron alloys classification, while R31538 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M62 steel and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
86
Tensile Strength: Ultimate (UTS), MPa 830 to 2440
1020 to 1360

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1650
1360
Melting Onset (Solidus), °C 1600
1290
Specific Heat Capacity, J/kg-K 430
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 10
8.1
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 110
530

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 27 to 80
34 to 45
Strength to Weight: Bending, points 23 to 47
27 to 32
Thermal Shock Resistance, points 24 to 71
25 to 33

Alloy Composition

Carbon (C), % 1.3 to 1.4
0.15 to 0.35
Chromium (Cr), % 3.5 to 4.0
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.6 to 77.4
0 to 0.75
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 10 to 11
5.0 to 7.0
Nickel (Ni), % 0 to 0.3
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 5.8 to 6.5
0
Vanadium (V), % 1.8 to 2.1
0

Comparable Variants