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SAE-AISI H19 Steel vs. R30012 Cobalt

SAE-AISI H19 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 H19 steel and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
830

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1540
1470
Melting Onset (Solidus), °C 1490
1280
Specific Heat Capacity, J/kg-K 460
440
Thermal Conductivity, W/m-K 29
15
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.8
Embodied Carbon, kg CO2/kg material 7.5
8.3
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 110
480

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 24 to 68
26
Strength to Weight: Bending, points 22 to 43
22
Thermal Diffusivity, mm2/s 7.9
3.8
Thermal Shock Resistance, points 21 to 59
23

Alloy Composition

Carbon (C), % 0.32 to 0.45
1.4 to 2.0
Chromium (Cr), % 4.0 to 4.8
27 to 32
Cobalt (Co), % 4.0 to 4.5
47.5 to 64.1
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 85.5
0 to 3.0
Manganese (Mn), % 0.2 to 0.5
0
Molybdenum (Mo), % 0.3 to 0.55
0 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 3.8 to 4.5
7.5 to 9.5
Vanadium (V), % 1.8 to 2.2
0