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G-CoCr28 Cobalt vs. C72700 Copper-nickel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while C72700 copper-nickel belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is C72700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
120
Elongation at Break, % 6.7
4.0 to 36
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 83
44
Tensile Strength: Ultimate (UTS), MPa 560
460 to 1070
Tensile Strength: Yield (Proof), MPa 260
580 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 320
210
Maximum Temperature: Mechanical, °C 1200
200
Melting Completion (Liquidus), °C 1330
1100
Melting Onset (Solidus), °C 1270
930
Specific Heat Capacity, J/kg-K 470
380
Thermal Conductivity, W/m-K 8.5
54
Thermal Expansion, µm/m-K 14
17

Otherwise Unclassified Properties

Base Metal Price, % relative 100
36
Density, g/cm3 8.1
8.8
Embodied Carbon, kg CO2/kg material 6.2
4.0
Embodied Energy, MJ/kg 84
62
Embodied Water, L/kg 440
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
20 to 380
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1420 to 4770
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 19
14 to 34
Strength to Weight: Bending, points 19
15 to 26
Thermal Diffusivity, mm2/s 2.2
16
Thermal Shock Resistance, points 14
16 to 38

Alloy Composition

Carbon (C), % 0.050 to 0.25
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
82.1 to 86
Iron (Fe), % 9.7 to 24.5
0 to 0.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0 to 1.5
0.050 to 0.3
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
8.5 to 9.5
Niobium (Nb), % 0 to 0.5
0 to 0.1
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.5 to 1.5
0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
5.5 to 6.5
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.3