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G-CoCr28 Cobalt vs. EN 1.4590 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.4590 stainless steel belongs to the iron alloys. They have a modest 35% 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 (5, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is EN 1.4590 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
26
Fatigue Strength, MPa 130
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
480
Tensile Strength: Yield (Proof), MPa 260
270

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1200
860
Melting Completion (Liquidus), °C 1330
1440
Melting Onset (Solidus), °C 1270
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 8.5
26
Thermal Expansion, µm/m-K 14
10

Otherwise Unclassified Properties

Base Metal Price, % relative 100
11
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
2.5
Embodied Energy, MJ/kg 84
37
Embodied Water, L/kg 440
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
110
Resilience: Unit (Modulus of Resilience), kJ/m3 160
190
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
17
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 2.2
7.0
Thermal Shock Resistance, points 14
17

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
Iron (Fe), % 9.7 to 24.5
79.7 to 83.7
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
0
Niobium (Nb), % 0 to 0.5
0.35 to 0.55
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 0.015
Zirconium (Zr), % 0
0 to 0.15