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G-CoCr28 Cobalt vs. AISI 204 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 204 stainless steel belongs to the iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. 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 G-CoCr28 cobalt and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
23 to 39
Fatigue Strength, MPa 130
320 to 720
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
730 to 1100
Tensile Strength: Yield (Proof), MPa 260
380 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1200
850
Melting Completion (Liquidus), °C 1330
1410
Melting Onset (Solidus), °C 1270
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 8.5
15
Thermal Expansion, µm/m-K 14
17

Otherwise Unclassified Properties

Base Metal Price, % relative 100
10
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
2.4
Embodied Energy, MJ/kg 84
35
Embodied Water, L/kg 440
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 160
360 to 2940
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
27 to 40
Strength to Weight: Bending, points 19
24 to 31
Thermal Diffusivity, mm2/s 2.2
4.1
Thermal Shock Resistance, points 14
16 to 24

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.030
Chromium (Cr), % 27 to 30
15 to 17
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
69.6 to 76.4
Manganese (Mn), % 0 to 1.5
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
1.5 to 3.0
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0.15 to 0.3
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