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G-CoCr28 Cobalt vs. AISI 201LN Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 201LN 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 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 201LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
25 to 51
Fatigue Strength, MPa 130
340 to 540
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
740 to 1060
Tensile Strength: Yield (Proof), MPa 260
350 to 770

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1200
880
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
12
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
2.6
Embodied Energy, MJ/kg 84
38
Embodied Water, L/kg 440
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
230 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 160
310 to 1520
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
27 to 38
Strength to Weight: Bending, points 19
24 to 30
Thermal Diffusivity, mm2/s 2.2
4.0
Thermal Shock Resistance, points 14
16 to 23

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.030
Chromium (Cr), % 27 to 30
16 to 17.5
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 9.7 to 24.5
67.9 to 73.5
Manganese (Mn), % 0 to 1.5
6.4 to 7.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
4.0 to 5.0
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0.1 to 0.25
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 0.015