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G-CoCr28 Cobalt vs. AISI 316L Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 316L 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 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is AISI 316L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
9.0 to 50
Fatigue Strength, MPa 130
170 to 450
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
78
Tensile Strength: Ultimate (UTS), MPa 560
530 to 1160
Tensile Strength: Yield (Proof), MPa 260
190 to 870

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 1200
870
Melting Completion (Liquidus), °C 1330
1400
Melting Onset (Solidus), °C 1270
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 8.5
15
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 100
19
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.2
3.9
Embodied Energy, MJ/kg 84
53
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
77 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 160
93 to 1880
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
19 to 41
Strength to Weight: Bending, points 19
18 to 31
Thermal Diffusivity, mm2/s 2.2
4.1
Thermal Shock Resistance, points 14
12 to 25

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.030
Chromium (Cr), % 27 to 30
16 to 18
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
62 to 72
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
2.0 to 3.0
Nickel (Ni), % 0 to 4.0
10 to 14
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.5 to 1.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030