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G-CoCr28 Cobalt vs. AISI 205 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 205 stainless steel belongs to the iron alloys. They have a modest 37% 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 (6, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
11 to 51
Fatigue Strength, MPa 130
410 to 640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
800 to 1430
Tensile Strength: Yield (Proof), MPa 260
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1200
880
Melting Completion (Liquidus), °C 1330
1380
Melting Onset (Solidus), °C 1270
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 14
18

Otherwise Unclassified Properties

Base Metal Price, % relative 100
11
Density, g/cm3 8.1
7.6
Embodied Carbon, kg CO2/kg material 6.2
2.6
Embodied Energy, MJ/kg 84
37
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 160
510 to 3060
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 19
29 to 52
Strength to Weight: Bending, points 19
25 to 37
Thermal Shock Resistance, points 14
16 to 29

Alloy Composition

Carbon (C), % 0.050 to 0.25
0.12 to 0.25
Chromium (Cr), % 27 to 30
16.5 to 18.5
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
62.6 to 68.1
Manganese (Mn), % 0 to 1.5
14 to 15.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
1.0 to 1.7
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0.32 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030