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R31233 Cobalt vs. EN 1.4630 Stainless Steel

R31233 cobalt belongs to the cobalt alloys classification, while EN 1.4630 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is EN 1.4630 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 17
23
Fatigue Strength, MPa 220
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
76
Tensile Strength: Ultimate (UTS), MPa 1020
480
Tensile Strength: Yield (Proof), MPa 420
250

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1330
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 12
28
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.3

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 8.4
2.5
Embodied Energy, MJ/kg 110
36
Embodied Water, L/kg 480
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
92
Resilience: Unit (Modulus of Resilience), kJ/m3 410
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33
17
Strength to Weight: Bending, points 26
18
Thermal Diffusivity, mm2/s 3.2
7.5
Thermal Shock Resistance, points 25
17

Alloy Composition

Aluminum (Al), % 0
0 to 1.5
Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.030
Chromium (Cr), % 23.5 to 27.5
13 to 16
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 1.0 to 5.0
77.1 to 86.7
Manganese (Mn), % 0.1 to 1.5
0 to 1.0
Molybdenum (Mo), % 4.0 to 6.0
0 to 0.5
Nickel (Ni), % 7.0 to 11
0 to 0.5
Niobium (Nb), % 0
0 to 0.5
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.050
Silicon (Si), % 0.050 to 1.0
0.2 to 1.5
Sulfur (S), % 0 to 0.020
0 to 0.050
Titanium (Ti), % 0
0.15 to 0.8
Tungsten (W), % 1.0 to 3.0
0