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SAE-AISI H43 Steel vs. R30001 Cobalt

SAE-AISI H43 steel belongs to the iron alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 20 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 SAE-AISI H43 steel and the bottom bar is R30001 cobalt.

SAE-AISI H43 (T20843) Molybdenum Hot-Work SteelUNS R30001 Co-Cr-W Alloy
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
620

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Melting Completion (Liquidus), °C 1530
1530
Melting Onset (Solidus), °C 1480
1260
Specific Heat Capacity, J/kg-K 460
430
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 7.9
9.0
Embodied Carbon, kg CO2/kg material 8.2
8.9
Embodied Energy, MJ/kg 120
130
Embodied Water, L/kg 100
460

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 25 to 75
19
Strength to Weight: Bending, points 22 to 46
18
Thermal Diffusivity, mm2/s 8.3
3.7
Thermal Shock Resistance, points 21 to 62
19

Alloy Composition

Carbon (C), % 0.5 to 0.65
2.0 to 3.0
Chromium (Cr), % 3.8 to 4.5
28 to 32
Cobalt (Co), % 0
43 to 59
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
11 to 13
Vanadium (V), % 1.8 to 2.2
0