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R30012 Cobalt vs. Austempered Cast Iron

R30012 cobalt belongs to the cobalt alloys classification, while austempered cast iron belongs to the iron alloys. There are 24 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 R30012 cobalt and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
180
Elongation at Break, % 1.0
1.1 to 13
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
62 to 69
Tensile Strength: Ultimate (UTS), MPa 830
860 to 1800
Tensile Strength: Yield (Proof), MPa 650
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1470
1380
Melting Onset (Solidus), °C 1280
1340
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 15
42
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.5
Embodied Carbon, kg CO2/kg material 8.3
1.8
Embodied Energy, MJ/kg 120
25
Embodied Water, L/kg 480
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 960
880 to 3970
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
32 to 66
Strength to Weight: Bending, points 22
27 to 44
Thermal Diffusivity, mm2/s 3.8
11
Thermal Shock Resistance, points 23
25 to 53

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Carbon (C), % 1.4 to 2.0
3.4 to 3.8
Chromium (Cr), % 27 to 32
0 to 0.1
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 0 to 3.0
89.6 to 94
Magnesium (Mg), % 0
0 to 0.040
Manganese (Mn), % 0
0.3 to 0.4
Molybdenum (Mo), % 0 to 1.0
0 to 0.3
Nickel (Ni), % 0 to 3.0
0 to 2.0
Phosphorus (P), % 0
0 to 0.040
Selenium (Se), % 0
0 to 0.030
Silicon (Si), % 0 to 2.0
2.3 to 2.7
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Tungsten (W), % 7.5 to 9.5
0
Vanadium (V), % 0
0 to 0.1