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R30816 Cobalt vs. AISI 410S Stainless Steel

R30816 cobalt belongs to the cobalt alloys classification, while AISI 410S stainless steel belongs to the iron alloys. There are 27 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 AISI 410S stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
160
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
25
Fatigue Strength, MPa 250
180
Poisson's Ratio 0.3
0.28
Reduction in Area, % 22
50
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 1020
480
Tensile Strength: Yield (Proof), MPa 460
250

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1540
1440
Melting Onset (Solidus), °C 1460
1400
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.7
Embodied Carbon, kg CO2/kg material 20
1.9
Embodied Energy, MJ/kg 320
27
Embodied Water, L/kg 440
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
100
Resilience: Unit (Modulus of Resilience), kJ/m3 510
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
17
Strength to Weight: Bending, points 25
18
Thermal Diffusivity, mm2/s 3.3
8.1
Thermal Shock Resistance, points 28
17

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.080
Chromium (Cr), % 19 to 21
11.5 to 13.5
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
83.8 to 88.5
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0 to 0.6
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
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