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G-CoCr28 Cobalt vs. EN 1.4029 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.4029 stainless steel belongs to the iron alloys. They have a modest 32% 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 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 6.7
10 to 20
Fatigue Strength, MPa 130
270 to 400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
76
Tensile Strength: Ultimate (UTS), MPa 560
700 to 930
Tensile Strength: Yield (Proof), MPa 260
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Maximum Temperature: Mechanical, °C 1200
750
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
30
Thermal Expansion, µm/m-K 14
10

Otherwise Unclassified Properties

Base Metal Price, % relative 100
7.0
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
2.0
Embodied Energy, MJ/kg 84
28
Embodied Water, L/kg 440
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
89 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 160
440 to 1410
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
25 to 33
Strength to Weight: Bending, points 19
23 to 27
Thermal Diffusivity, mm2/s 2.2
8.1
Thermal Shock Resistance, points 14
26 to 34

Alloy Composition

Carbon (C), % 0.050 to 0.25
0.25 to 0.32
Chromium (Cr), % 27 to 30
12 to 13.5
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
82.8 to 87.6
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.6
Nickel (Ni), % 0 to 4.0
0
Niobium (Nb), % 0 to 0.5
0
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
0.15 to 0.25