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R31233 Cobalt vs. EN 1.4005 Stainless Steel

R31233 cobalt belongs to the cobalt alloys classification, while EN 1.4005 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 1.4005 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 17
13 to 21
Fatigue Strength, MPa 220
240 to 290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
76
Tensile Strength: Ultimate (UTS), MPa 1020
630 to 750
Tensile Strength: Yield (Proof), MPa 420
370 to 500

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1330
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 12
30
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.9
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
2.0
Embodied Energy, MJ/kg 110
28
Embodied Water, L/kg 480
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
90 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 410
350 to 650
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33
23 to 27
Strength to Weight: Bending, points 26
21 to 24
Thermal Diffusivity, mm2/s 3.2
8.1
Thermal Shock Resistance, points 25
23 to 27

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.060 to 0.15
Chromium (Cr), % 23.5 to 27.5
12 to 14
Cobalt (Co), % 44.7 to 63.3
0
Iron (Fe), % 1.0 to 5.0
82.4 to 87.8
Manganese (Mn), % 0.1 to 1.5
0 to 1.5
Molybdenum (Mo), % 4.0 to 6.0
0 to 0.6
Nickel (Ni), % 7.0 to 11
0
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.050 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0.15 to 0.35
Tungsten (W), % 1.0 to 3.0
0