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R31539 Cobalt vs. EN 1.4469 Stainless Steel

R31539 cobalt belongs to the cobalt alloys classification, while EN 1.4469 stainless steel belongs to the iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. 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 1.4469 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 13 to 22
25
Fatigue Strength, MPa 310 to 480
380
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 86
81
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
740
Tensile Strength: Yield (Proof), MPa 590 to 940
550

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1360
1450
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
17
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.2
4.1
Embodied Energy, MJ/kg 110
57
Embodied Water, L/kg 530
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
170
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
730
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
26
Strength to Weight: Bending, points 27 to 32
23
Thermal Diffusivity, mm2/s 3.5
4.6
Thermal Shock Resistance, points 24 to 32
20

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0 to 0.030
Chromium (Cr), % 26 to 30
25 to 27
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
0 to 1.3
Iron (Fe), % 0 to 0.75
56.4 to 65.9
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
3.0 to 5.0
Nickel (Ni), % 0 to 1.0
6.0 to 8.0
Nitrogen (N), % 0 to 0.25
0.12 to 0.22
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0
0 to 0.025