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R30003 Cobalt vs. N08800 Stainless Steel

R30003 cobalt belongs to the cobalt alloys classification, while N08800 stainless steel belongs to the iron alloys. They have 52% of their average alloy composition in common. 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 N08800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 10 to 73
4.5 to 34
Fatigue Strength, MPa 320 to 560
150 to 390
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
500 to 1000
Tensile Strength: Yield (Proof), MPa 510 to 1090
190 to 830

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1440
1360
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 95
30
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.0
5.3
Embodied Energy, MJ/kg 110
76
Embodied Water, L/kg 400
200

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
96 to 1740
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32 to 57
18 to 35
Strength to Weight: Bending, points 26 to 38
18 to 28
Thermal Diffusivity, mm2/s 3.3
3.0
Thermal Shock Resistance, points 26 to 45
13 to 25

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0 to 0.1
Chromium (Cr), % 19 to 21
19 to 23
Cobalt (Co), % 39 to 41
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 10 to 20.5
39.5 to 50.7
Manganese (Mn), % 1.5 to 2.5
0 to 1.5
Molybdenum (Mo), % 6.0 to 8.0
0
Nickel (Ni), % 14 to 16
30 to 35
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6

Comparable Variants