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G-CoCr28 Cobalt vs. S44660 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while S44660 stainless steel belongs to the iron alloys. They have 47% of their average alloy composition in common. There are 27 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 S44660 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 6.7
20
Fatigue Strength, MPa 130
330
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 83
81
Tensile Strength: Ultimate (UTS), MPa 560
660
Tensile Strength: Yield (Proof), MPa 260
510

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Mechanical, °C 1200
1100
Melting Completion (Liquidus), °C 1330
1460
Melting Onset (Solidus), °C 1270
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 8.5
17
Thermal Expansion, µm/m-K 14
11

Otherwise Unclassified Properties

Base Metal Price, % relative 100
21
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
4.3
Embodied Energy, MJ/kg 84
61
Embodied Water, L/kg 440
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
120
Resilience: Unit (Modulus of Resilience), kJ/m3 160
640
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 2.2
4.5
Thermal Shock Resistance, points 14
21

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.030
Chromium (Cr), % 27 to 30
25 to 28
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
60.4 to 71
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
3.0 to 4.0
Nickel (Ni), % 0 to 4.0
1.0 to 3.5
Niobium (Nb), % 0 to 0.5
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.0