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R30075 Cobalt vs. EN 1.4031 Stainless Steel

R30075 cobalt belongs to the cobalt alloys classification, while EN 1.4031 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Elongation at Break, % 12
11 to 13
Fatigue Strength, MPa 250 to 840
220 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 82 to 98
76
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
670 to 900
Tensile Strength: Yield (Proof), MPa 480 to 840
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
1440
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.1
1.9
Embodied Energy, MJ/kg 110
27
Embodied Water, L/kg 530
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
380 to 1360
Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
25
Strength to Weight: Axial, points 26 to 42
24 to 32
Strength to Weight: Bending, points 22 to 31
22 to 27
Thermal Diffusivity, mm2/s 3.5
8.1
Thermal Shock Resistance, points 21 to 29
23 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0.36 to 0.42
Chromium (Cr), % 27 to 30
12.5 to 14.5
Cobalt (Co), % 58.7 to 68
0
Iron (Fe), % 0 to 0.75
83 to 87.1
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0

Comparable Variants