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R31538 Cobalt vs. SAE-AISI H43 Steel

R31538 cobalt belongs to the cobalt alloys classification, while SAE-AISI H43 steel belongs to the iron 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 R31538 cobalt and the bottom bar is SAE-AISI H43 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
710 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1530
Melting Onset (Solidus), °C 1290
1480
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 530
100

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 34 to 45
25 to 75
Strength to Weight: Bending, points 27 to 32
22 to 46
Thermal Diffusivity, mm2/s 3.5
8.3
Thermal Shock Resistance, points 25 to 33
21 to 62

Alloy Composition

Carbon (C), % 0.15 to 0.35
0.5 to 0.65
Chromium (Cr), % 26 to 30
3.8 to 4.5
Cobalt (Co), % 58.7 to 68.9
0
Iron (Fe), % 0 to 0.75
83.2 to 85.9
Manganese (Mn), % 0 to 1.0
0.15 to 0.4
Molybdenum (Mo), % 5.0 to 7.0
7.8 to 8.5
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.45
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
1.8 to 2.2

Comparable Variants