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R30816 Cobalt vs. EN 1.4662 Stainless Steel

R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4662 stainless steel belongs to the iron alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is EN 1.4662 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
28
Fatigue Strength, MPa 250
430 to 450
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 81
79
Tensile Strength: Ultimate (UTS), MPa 1020
810 to 830
Tensile Strength: Yield (Proof), MPa 460
580 to 620

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Melting Completion (Liquidus), °C 1540
1430
Melting Onset (Solidus), °C 1460
1380
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.7
Embodied Carbon, kg CO2/kg material 20
3.2
Embodied Energy, MJ/kg 320
45
Embodied Water, L/kg 440
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
210
Resilience: Unit (Modulus of Resilience), kJ/m3 510
840 to 940
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
29 to 30
Strength to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 3.3
3.9
Thermal Shock Resistance, points 28
22

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.030
Chromium (Cr), % 19 to 21
23 to 25
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0.1 to 0.8
Iron (Fe), % 0 to 5.0
62.6 to 70.2
Manganese (Mn), % 1.0 to 2.0
2.5 to 4.0
Molybdenum (Mo), % 3.5 to 4.5
1.0 to 2.0
Nickel (Ni), % 19 to 21
3.0 to 4.5
Niobium (Nb), % 3.5 to 4.5
0
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.0050
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0