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R31538 Cobalt vs. EN 1.3961 Alloy

R31538 cobalt belongs to the cobalt alloys classification, while EN 1.3961 alloy belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is EN 1.3961 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 23
31
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 86
72
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
450
Tensile Strength: Yield (Proof), MPa 580 to 930
310

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1290
1390
Specific Heat Capacity, J/kg-K 450
460
Thermal Expansion, µm/m-K 13
1.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.2
Embodied Carbon, kg CO2/kg material 8.1
4.8
Embodied Energy, MJ/kg 110
66
Embodied Water, L/kg 530
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
130
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
250
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
15
Strength to Weight: Bending, points 27 to 32
16
Thermal Shock Resistance, points 25 to 33
130

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.050
Chromium (Cr), % 26 to 30
0 to 0.25
Cobalt (Co), % 58.7 to 68.9
0
Iron (Fe), % 0 to 0.75
60.7 to 65
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
0 to 1.0
Nickel (Ni), % 0 to 1.0
35 to 37
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0
0 to 0.020