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SAE-AISI H43 Steel vs. R30012 Cobalt

SAE-AISI H43 steel belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H43 steel and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
86
Tensile Strength: Ultimate (UTS), MPa 710 to 2140
830

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1530
1470
Melting Onset (Solidus), °C 1480
1280
Specific Heat Capacity, J/kg-K 460
440
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 8.2
8.3
Embodied Energy, MJ/kg 120
120
Embodied Water, L/kg 100
480

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 25 to 75
26
Strength to Weight: Bending, points 22 to 46
22
Thermal Diffusivity, mm2/s 8.3
3.8
Thermal Shock Resistance, points 21 to 62
23

Alloy Composition

Carbon (C), % 0.5 to 0.65
1.4 to 2.0
Chromium (Cr), % 3.8 to 4.5
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Iron (Fe), % 83.2 to 85.9
0 to 3.0
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 7.8 to 8.5
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
7.5 to 9.5
Vanadium (V), % 1.8 to 2.2
0