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G-CoCr28 Cobalt vs. SAE-AISI M30 Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while SAE-AISI M30 steel belongs to the iron alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 G-CoCr28 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 0.28
0.29
Shear Modulus, GPa 83
78
Tensile Strength: Ultimate (UTS), MPa 560
800 to 2170

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1330
1550
Melting Onset (Solidus), °C 1270
1500
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 8.5
24
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 100
26
Density, g/cm3 8.1
8.2
Embodied Carbon, kg CO2/kg material 6.2
7.2
Embodied Energy, MJ/kg 84
100
Embodied Water, L/kg 440
120

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
27 to 74
Strength to Weight: Bending, points 19
24 to 46
Thermal Diffusivity, mm2/s 2.2
6.6
Thermal Shock Resistance, points 14
25 to 67

Alloy Composition

Carbon (C), % 0.050 to 0.25
0.75 to 0.85
Chromium (Cr), % 27 to 30
3.5 to 4.3
Cobalt (Co), % 48 to 52
4.5 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 9.7 to 24.5
75.2 to 80.9
Manganese (Mn), % 0 to 1.5
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.5
7.8 to 9.0
Nickel (Ni), % 0 to 4.0
0 to 0.3
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.5 to 1.5
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.3 to 2.3
Vanadium (V), % 0
1.0 to 1.4