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R31539 Cobalt vs. EN 1.4710 Stainless Steel

R31539 cobalt belongs to the cobalt alloys classification, while EN 1.4710 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is EN 1.4710 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 22
20
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
74

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1290
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
24
Thermal Expansion, µm/m-K 13
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
6.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
7.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.2
1.8
Embodied Energy, MJ/kg 110
24
Embodied Water, L/kg 530
76

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 3.5
6.5

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0.2 to 0.35
Chromium (Cr), % 26 to 30
6.0 to 8.0
Cobalt (Co), % 57.7 to 68.7
0
Iron (Fe), % 0 to 0.75
87.4 to 92.3
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0 to 0.15
Nickel (Ni), % 0 to 1.0
0 to 0.5
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 1.0
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030