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R30816 Cobalt vs. EN 1.4482 Stainless Steel

R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4482 stainless steel belongs to the iron alloys. They have a modest 27% 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 1.4482 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
34
Fatigue Strength, MPa 250
420 to 450
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 1020
770 to 800
Tensile Strength: Yield (Proof), MPa 460
530 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Melting Completion (Liquidus), °C 1540
1420
Melting Onset (Solidus), °C 1460
1370
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
2.7
Embodied Energy, MJ/kg 320
38
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
230 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 510
690 to 820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
28 to 29
Strength to Weight: Bending, points 25
24 to 25
Thermal Diffusivity, mm2/s 3.3
4.0
Thermal Shock Resistance, points 28
21 to 22

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.030
Chromium (Cr), % 19 to 21
19.5 to 21.5
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 0 to 5.0
66.1 to 74.9
Manganese (Mn), % 1.0 to 2.0
4.0 to 6.0
Molybdenum (Mo), % 3.5 to 4.5
0.1 to 0.6
Nickel (Ni), % 19 to 21
1.5 to 3.5
Niobium (Nb), % 3.5 to 4.5
0
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0