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R30016 Cobalt vs. EN 1.4762 Stainless Steel

R30016 cobalt belongs to the cobalt alloys classification, while EN 1.4762 stainless steel belongs to the iron alloys. They have a modest 28% 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 (11, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is EN 1.4762 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 8.4
13
Fatigue Strength, MPa 290
180
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 85
78
Tensile Strength: Ultimate (UTS), MPa 1010
620
Tensile Strength: Yield (Proof), MPa 580
310

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1360
1410
Melting Onset (Solidus), °C 1270
1370
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
1.9

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 7.7
2.5
Embodied Energy, MJ/kg 110
37
Embodied Water, L/kg 500
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
67
Resilience: Unit (Modulus of Resilience), kJ/m3 770
250
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 33
23
Strength to Weight: Bending, points 26
21
Thermal Diffusivity, mm2/s 3.9
4.6
Thermal Shock Resistance, points 24
22

Alloy Composition

Aluminum (Al), % 0
1.2 to 1.7
Carbon (C), % 0.9 to 1.4
0 to 0.12
Chromium (Cr), % 28 to 32
23 to 26
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
69.7 to 75.1
Manganese (Mn), % 0.5 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 1.5
0
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 2.0
0.7 to 1.4
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 3.5 to 5.5
0