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R31233 Cobalt vs. EN 1.4659 Stainless Steel

R31233 cobalt belongs to the cobalt alloys classification, while EN 1.4659 stainless steel belongs to the iron alloys. They have 44% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is EN 1.4659 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 17
49
Fatigue Strength, MPa 220
460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
81
Tensile Strength: Ultimate (UTS), MPa 1020
900
Tensile Strength: Yield (Proof), MPa 420
480

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1350
1480
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.2
Embodied Carbon, kg CO2/kg material 8.4
6.5
Embodied Energy, MJ/kg 110
89
Embodied Water, L/kg 480
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
370
Resilience: Unit (Modulus of Resilience), kJ/m3 410
550
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
31
Strength to Weight: Bending, points 26
25
Thermal Diffusivity, mm2/s 3.2
3.2
Thermal Shock Resistance, points 25
19

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.020
Chromium (Cr), % 23.5 to 27.5
23 to 25
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
1.0 to 2.0
Iron (Fe), % 1.0 to 5.0
35.7 to 45.7
Manganese (Mn), % 0.1 to 1.5
2.0 to 4.0
Molybdenum (Mo), % 4.0 to 6.0
5.5 to 6.5
Nickel (Ni), % 7.0 to 11
21 to 23
Nitrogen (N), % 0.030 to 0.12
0.35 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.050 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.020
0 to 0.010
Tungsten (W), % 1.0 to 3.0
1.5 to 2.5