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G-CoCr28 Cobalt vs. EN 1.4361 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.4361 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 (7, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is EN 1.4361 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 6.7
43
Fatigue Strength, MPa 130
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
75
Tensile Strength: Ultimate (UTS), MPa 560
630
Tensile Strength: Yield (Proof), MPa 260
250

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Maximum Temperature: Mechanical, °C 1200
940
Melting Completion (Liquidus), °C 1330
1370
Melting Onset (Solidus), °C 1270
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 8.5
14
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 100
19
Density, g/cm3 8.1
7.6
Embodied Carbon, kg CO2/kg material 6.2
3.6
Embodied Energy, MJ/kg 84
52
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
220
Resilience: Unit (Modulus of Resilience), kJ/m3 160
160
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
23
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 2.2
3.7
Thermal Shock Resistance, points 14
15

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.015
Chromium (Cr), % 27 to 30
16.5 to 18.5
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
58.7 to 65.8
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.2
Nickel (Ni), % 0 to 4.0
14 to 16
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0.5 to 1.5
3.7 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.010