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R30075 Cobalt vs. SAE-AISI M3 Class 1 Steel

R30075 cobalt belongs to the cobalt alloys classification, while SAE-AISI M3 class 1 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is SAE-AISI M3 class 1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 82 to 98
77
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1360
1610
Melting Onset (Solidus), °C 1290
1570
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
26
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
10
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
100

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
13
Stiffness to Weight: Bending, points 24 to 25
23
Strength to Weight: Axial, points 26 to 42
26 to 72
Strength to Weight: Bending, points 22 to 31
22 to 44
Thermal Diffusivity, mm2/s 3.5
7.2
Thermal Shock Resistance, points 21 to 29
24 to 67

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
1.0 to 1.1
Chromium (Cr), % 27 to 30
3.8 to 4.5
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 0.75
76.9 to 82.9
Manganese (Mn), % 0 to 1.0
0.15 to 0.4
Molybdenum (Mo), % 5.0 to 7.0
4.8 to 6.5
Nickel (Ni), % 0 to 0.5
0 to 0.3
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.45
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
5.0 to 6.8
Vanadium (V), % 0
2.3 to 2.8

Comparable Variants