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G-CoCr28 Cobalt vs. SAE-AISI 1008 Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1008 steel belongs to the iron alloys. 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 SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 6.7
22 to 33
Fatigue Strength, MPa 130
150 to 220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 83
73
Tensile Strength: Ultimate (UTS), MPa 560
330 to 370
Tensile Strength: Yield (Proof), MPa 260
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 1200
400
Melting Completion (Liquidus), °C 1330
1470
Melting Onset (Solidus), °C 1270
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 8.5
62
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 100
1.8
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.2
1.4
Embodied Energy, MJ/kg 84
18
Embodied Water, L/kg 440
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 160
92 to 260
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
12 to 13
Strength to Weight: Bending, points 19
13 to 15
Thermal Diffusivity, mm2/s 2.2
17
Thermal Shock Resistance, points 14
10 to 12

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.1
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
99.31 to 99.7
Manganese (Mn), % 0 to 1.5
0.3 to 0.5
Molybdenum (Mo), % 0 to 0.5
0
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
Sulfur (S), % 0 to 0.030
0 to 0.050