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SAE-AISI H14 Steel vs. R30021 Cobalt

SAE-AISI H14 steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H14 steel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 710 to 2030
700

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Melting Completion (Liquidus), °C 1530
1350
Melting Onset (Solidus), °C 1490
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 35
15
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.1
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.0
Embodied Energy, MJ/kg 39
110
Embodied Water, L/kg 73
520

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 69
23
Strength to Weight: Bending, points 22 to 44
21
Thermal Diffusivity, mm2/s 9.3
3.8
Thermal Shock Resistance, points 24 to 68
21

Alloy Composition

Carbon (C), % 0.35 to 0.45
0.2 to 0.35
Chromium (Cr), % 4.8 to 5.5
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 86.5 to 89.9
0 to 3.0
Manganese (Mn), % 0.2 to 0.5
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0 to 0.3
2.0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.8 to 1.2
0 to 1.5
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 4.0 to 5.3
0