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Annealed SAE-AISI H14 vs. Annealed R31538 Cobalt

Annealed SAE-AISI H14 belongs to the iron alloys classification, while annealed R31538 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is annealed SAE-AISI H14 and the bottom bar is annealed R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 710
1020

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1530
1360
Melting Onset (Solidus), °C 1490
1290
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 35
13
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.1
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.1
Embodied Energy, MJ/kg 39
110
Embodied Water, L/kg 73
530

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
34
Strength to Weight: Bending, points 22
27
Thermal Diffusivity, mm2/s 9.3
3.5
Thermal Shock Resistance, points 24
25

Alloy Composition

Carbon (C), % 0.35 to 0.45
0.15 to 0.35
Chromium (Cr), % 4.8 to 5.5
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 86.5 to 89.9
0 to 0.75
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
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), % 0.8 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 4.0 to 5.3
0