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R30816 Cobalt vs. AISI 416 Stainless Steel

R30816 cobalt belongs to the cobalt alloys classification, while AISI 416 stainless steel belongs to the iron alloys. 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 AISI 416 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
230 to 320
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
13 to 31
Fatigue Strength, MPa 250
230 to 340
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 1020
510 to 800
Tensile Strength: Yield (Proof), MPa 460
290 to 600

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1540
1530
Melting Onset (Solidus), °C 1460
1480
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 12
9.9

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
98 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 510
220 to 940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
18 to 29
Strength to Weight: Bending, points 25
18 to 25
Thermal Diffusivity, mm2/s 3.3
8.1
Thermal Shock Resistance, points 28
19 to 30

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.15
Chromium (Cr), % 19 to 21
12 to 14
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
83.2 to 87.9
Manganese (Mn), % 1.0 to 2.0
0 to 1.3
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0.15 to 0.35
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0