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R30003 Cobalt vs. AISI 416 Stainless Steel

R30003 cobalt belongs to the cobalt alloys classification, while AISI 416 stainless steel belongs to the iron alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30003 cobalt and the bottom bar is AISI 416 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 10 to 73
13 to 31
Fatigue Strength, MPa 320 to 560
230 to 340
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 83
76
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
510 to 800
Tensile Strength: Yield (Proof), MPa 510 to 1090
290 to 600

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Melting Completion (Liquidus), °C 1400
1530
Melting Onset (Solidus), °C 1440
1480
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 13
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 95
7.0
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.0
1.9
Embodied Energy, MJ/kg 110
27
Embodied Water, L/kg 400
100

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
220 to 940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32 to 57
18 to 29
Strength to Weight: Bending, points 26 to 38
18 to 25
Thermal Diffusivity, mm2/s 3.3
8.1
Thermal Shock Resistance, points 26 to 45
19 to 30

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0 to 0.15
Chromium (Cr), % 19 to 21
12 to 14
Cobalt (Co), % 39 to 41
0
Iron (Fe), % 10 to 20.5
83.2 to 87.9
Manganese (Mn), % 1.5 to 2.5
0 to 1.3
Molybdenum (Mo), % 6.0 to 8.0
0
Nickel (Ni), % 14 to 16
0
Phosphorus (P), % 0 to 0.015
0 to 0.060
Silicon (Si), % 0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35

Comparable Variants