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G-CoCr28 Cobalt vs. EN 1.4020 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.4020 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 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 EN 1.4020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
13 to 34
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
770 to 1130
Tensile Strength: Yield (Proof), MPa 260
430 to 950

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1200
890
Melting Completion (Liquidus), °C 1330
1390
Melting Onset (Solidus), °C 1270
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 14
17

Otherwise Unclassified Properties

Base Metal Price, % relative 100
11
Density, g/cm3 8.1
7.6
Embodied Carbon, kg CO2/kg material 6.2
2.5
Embodied Energy, MJ/kg 84
37
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
140 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 160
460 to 2290
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
28 to 41
Strength to Weight: Bending, points 19
25 to 32
Thermal Shock Resistance, points 14
16 to 23

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.15
Chromium (Cr), % 27 to 30
16.5 to 19
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
62.8 to 71.8
Manganese (Mn), % 0 to 1.5
11 to 14
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
0.5 to 2.5
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0.2 to 0.45
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030