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SAE-AISI M47 Steel vs. R30001 Cobalt

SAE-AISI M47 steel belongs to the iron alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M47 steel and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
86
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
620

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Melting Completion (Liquidus), °C 1540
1530
Melting Onset (Solidus), °C 1500
1260
Specific Heat Capacity, J/kg-K 450
430
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Density, g/cm3 8.1
9.0
Embodied Carbon, kg CO2/kg material 7.4
8.9
Embodied Energy, MJ/kg 100
130
Embodied Water, L/kg 120
460

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 28 to 79
19
Strength to Weight: Bending, points 24 to 48
18
Thermal Diffusivity, mm2/s 6.3
3.7
Thermal Shock Resistance, points 27 to 77
19

Alloy Composition

Carbon (C), % 1.1 to 1.2
2.0 to 3.0
Chromium (Cr), % 3.5 to 4.0
28 to 32
Cobalt (Co), % 4.8 to 5.3
43 to 59
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.7 to 85
0 to 3.0
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 9.3 to 10
0 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 1.3 to 1.8
11 to 13
Vanadium (V), % 1.2 to 1.4
0