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G-CoCr28 Cobalt vs. S30601 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while S30601 stainless steel belongs to the iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is S30601 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 6.7
37
Fatigue Strength, MPa 130
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
75
Tensile Strength: Ultimate (UTS), MPa 560
660
Tensile Strength: Yield (Proof), MPa 260
300

Thermal Properties

Latent Heat of Fusion, J/g 320
370
Maximum Temperature: Mechanical, °C 1200
950
Melting Completion (Liquidus), °C 1330
1360
Melting Onset (Solidus), °C 1270
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 100
20
Density, g/cm3 8.1
7.6
Embodied Carbon, kg CO2/kg material 6.2
3.9
Embodied Energy, MJ/kg 84
55
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
200
Resilience: Unit (Modulus of Resilience), kJ/m3 160
230
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Shock Resistance, points 14
16

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.015
Chromium (Cr), % 27 to 30
17 to 18
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 9.7 to 24.5
56.9 to 60.5
Manganese (Mn), % 0 to 1.5
0.5 to 0.8
Molybdenum (Mo), % 0 to 0.5
0 to 0.2
Nickel (Ni), % 0 to 4.0
17 to 18
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.5 to 1.5
5.0 to 5.6
Sulfur (S), % 0 to 0.030
0 to 0.013