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SAE-AISI H23 Steel vs. R30012 Cobalt

SAE-AISI H23 steel belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. 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 H23 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 0.28
0.28
Shear Modulus, GPa 80
86
Tensile Strength: Ultimate (UTS), MPa 760 to 1550
830

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1680
1470
Melting Onset (Solidus), °C 1630
1280
Specific Heat Capacity, J/kg-K 440
440
Thermal Conductivity, W/m-K 20
15
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.8
Embodied Carbon, kg CO2/kg material 6.9
8.3
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 120
480

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 24 to 49
26
Strength to Weight: Bending, points 21 to 34
22
Thermal Diffusivity, mm2/s 5.2
3.8
Thermal Shock Resistance, points 23 to 47
23

Alloy Composition

Carbon (C), % 0.25 to 0.35
1.4 to 2.0
Chromium (Cr), % 11 to 12.8
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 71.3 to 76.7
0 to 3.0
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.6
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 11 to 12.8
7.5 to 9.5
Vanadium (V), % 0.75 to 1.3
0