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R31539 Cobalt vs. EN 1.4006 Stainless Steel

R31539 cobalt belongs to the cobalt alloys classification, while EN 1.4006 stainless steel belongs to the iron alloys. 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 R31539 cobalt and the bottom bar is EN 1.4006 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 22
16 to 23
Fatigue Strength, MPa 310 to 480
150 to 300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
590 to 750
Tensile Strength: Yield (Proof), MPa 590 to 940
230 to 510

Thermal Properties

Latent Heat of Fusion, J/g 320
270
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 13
11

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 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.2
1.9
Embodied Energy, MJ/kg 110
27
Embodied Water, L/kg 530
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
99 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
140 to 660
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
21 to 27
Strength to Weight: Bending, points 27 to 32
20 to 24
Thermal Diffusivity, mm2/s 3.5
8.1
Thermal Shock Resistance, points 24 to 32
21 to 26

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0.080 to 0.15
Chromium (Cr), % 26 to 30
11.5 to 13.5
Cobalt (Co), % 57.7 to 68.7
0
Iron (Fe), % 0 to 0.75
83.1 to 88.4
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.75
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0
0 to 0.015

Comparable Variants