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G-CoCr28 Cobalt vs. N08800 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while N08800 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 N08800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
4.5 to 34
Fatigue Strength, MPa 130
150 to 390
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
500 to 1000
Tensile Strength: Yield (Proof), MPa 260
190 to 830

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Mechanical, °C 1200
1100
Melting Completion (Liquidus), °C 1330
1390
Melting Onset (Solidus), °C 1270
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 8.5
12
Thermal Expansion, µm/m-K 14
14

Otherwise Unclassified Properties

Base Metal Price, % relative 100
30
Density, g/cm3 8.1
8.0
Embodied Carbon, kg CO2/kg material 6.2
5.3
Embodied Energy, MJ/kg 84
76
Embodied Water, L/kg 440
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
42 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 160
96 to 1740
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
18 to 35
Strength to Weight: Bending, points 19
18 to 28
Thermal Diffusivity, mm2/s 2.2
3.0
Thermal Shock Resistance, points 14
13 to 25

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.050 to 0.25
0 to 0.1
Chromium (Cr), % 27 to 30
19 to 23
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 9.7 to 24.5
39.5 to 50.7
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
30 to 35
Niobium (Nb), % 0 to 0.5
0
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 0.015
Titanium (Ti), % 0
0.15 to 0.6