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SAE-AISI H42 Steel vs. R31537 Cobalt

SAE-AISI H42 steel belongs to the iron alloys classification, while R31537 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 H42 steel and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
87
Tensile Strength: Ultimate (UTS), MPa 700 to 1980
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1620
1360
Melting Onset (Solidus), °C 1570
1290
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 24
13
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.8
8.1
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 98
530

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 23 to 65
33 to 44
Strength to Weight: Bending, points 21 to 42
26 to 32
Thermal Diffusivity, mm2/s 6.5
3.4
Thermal Shock Resistance, points 20 to 57
24 to 32

Alloy Composition

Carbon (C), % 0.55 to 0.7
0 to 0.14
Chromium (Cr), % 3.8 to 4.5
26 to 30
Cobalt (Co), % 0
58.9 to 69
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 79.3 to 83.8
0 to 0.75
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.5 to 5.5
5.0 to 7.0
Nickel (Ni), % 0 to 0.3
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0

Comparable Variants