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R30075 Cobalt vs. SAE-AISI H11 Steel

R30075 cobalt belongs to the cobalt alloys classification, while SAE-AISI H11 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is SAE-AISI H11 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 82 to 98
74
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
690 to 1840

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
42
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
9.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 110
43
Embodied Water, L/kg 530
75

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
25
Strength to Weight: Axial, points 26 to 42
25 to 66
Strength to Weight: Bending, points 22 to 31
22 to 43
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 21 to 29
22 to 58

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0.33 to 0.43
Chromium (Cr), % 27 to 30
4.8 to 5.5
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 0.75
89.6 to 92.5
Manganese (Mn), % 0 to 1.0
0.2 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
1.1 to 1.6
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
0.8 to 1.2
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Vanadium (V), % 0
0.3 to 0.6

Comparable Variants