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R30816 Cobalt vs. EN 1.4876 Stainless Steel

R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4876 stainless steel belongs to the iron alloys. They have 44% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is EN 1.4876 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
170
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
33
Fatigue Strength, MPa 250
150
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 1020
570
Tensile Strength: Yield (Proof), MPa 460
190

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1540
1400
Melting Onset (Solidus), °C 1460
1350
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.0
Embodied Carbon, kg CO2/kg material 20
5.3
Embodied Energy, MJ/kg 320
76
Embodied Water, L/kg 440
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 510
94
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
20
Strength to Weight: Bending, points 25
19
Thermal Diffusivity, mm2/s 3.3
3.2
Thermal Shock Resistance, points 28
14

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.32 to 0.42
0 to 0.12
Chromium (Cr), % 19 to 21
19 to 23
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
38.6 to 50.7
Manganese (Mn), % 1.0 to 2.0
0 to 2.0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
30 to 34
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 3.5 to 4.5
0
Titanium (Ti), % 0
0.15 to 0.6
Tungsten (W), % 3.5 to 4.5
0