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R30003 Cobalt vs. S46910 Stainless Steel

R30003 cobalt belongs to the cobalt alloys classification, while S46910 stainless steel belongs to the iron alloys. They have 41% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30003 cobalt and the bottom bar is S46910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 10 to 73
2.2 to 11
Fatigue Strength, MPa 320 to 560
250 to 1020
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 83
76
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
680 to 2470
Tensile Strength: Yield (Proof), MPa 510 to 1090
450 to 2290

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1440
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 95
18
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.0
4.1
Embodied Energy, MJ/kg 110
55
Embodied Water, L/kg 400
140

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
510 to 4780
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32 to 57
24 to 86
Strength to Weight: Bending, points 26 to 38
22 to 51
Thermal Shock Resistance, points 26 to 45
23 to 84

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.5
Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 19 to 21
11 to 13
Cobalt (Co), % 39 to 41
0
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 10 to 20.5
65 to 76
Manganese (Mn), % 1.5 to 2.5
0 to 1.0
Molybdenum (Mo), % 6.0 to 8.0
3.0 to 5.0
Nickel (Ni), % 14 to 16
8.0 to 10
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 1.2
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.5 to 1.2

Comparable Variants