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R30605 Cobalt vs. SAE-AISI M30 Steel

R30605 cobalt belongs to the cobalt alloys classification, while SAE-AISI M30 steel belongs to the iron 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 R30605 cobalt and the bottom bar is SAE-AISI M30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
800 to 2170

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1410
1550
Melting Onset (Solidus), °C 1330
1500
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 9.6
24
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.2
Embodied Carbon, kg CO2/kg material 9.8
7.2
Embodied Energy, MJ/kg 140
100
Embodied Water, L/kg 450
120

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 33 to 55
27 to 74
Strength to Weight: Bending, points 25 to 36
24 to 46
Thermal Diffusivity, mm2/s 2.5
6.6
Thermal Shock Resistance, points 31 to 52
25 to 67

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.75 to 0.85
Chromium (Cr), % 19 to 21
3.5 to 4.3
Cobalt (Co), % 46.4 to 57
4.5 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
75.2 to 80.9
Manganese (Mn), % 1.0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0
7.8 to 9.0
Nickel (Ni), % 9.0 to 11
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.4
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
1.3 to 2.3
Vanadium (V), % 0
1.0 to 1.4

Comparable Variants