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G-CoCr28 Cobalt vs. EN 1.4828 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.4828 stainless steel belongs to the iron alloys. They have 41% of their average alloy composition in common. 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 EN 1.4828 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
33
Fatigue Strength, MPa 130
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
650
Tensile Strength: Yield (Proof), MPa 260
260

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Maximum Temperature: Mechanical, °C 1200
1000
Melting Completion (Liquidus), °C 1330
1400
Melting Onset (Solidus), °C 1270
1360
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 8.5
15
Thermal Expansion, µm/m-K 14
17

Otherwise Unclassified Properties

Base Metal Price, % relative 100
17
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
3.4
Embodied Energy, MJ/kg 84
48
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
170
Resilience: Unit (Modulus of Resilience), kJ/m3 160
170
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
22
Thermal Diffusivity, mm2/s 2.2
4.0
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.2
Chromium (Cr), % 27 to 30
19 to 21
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
61.1 to 68.5
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
11 to 13
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.5 to 1.5
1.5 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.015