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G-CoCr28 Cobalt vs. SAE-AISI 52100 Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while SAE-AISI 52100 steel belongs to the iron alloys. There are 27 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 SAE-AISI 52100 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
250 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 83
72
Tensile Strength: Ultimate (UTS), MPa 560
590 to 2010
Tensile Strength: Yield (Proof), MPa 260
360 to 560

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 1200
430
Melting Completion (Liquidus), °C 1330
1450
Melting Onset (Solidus), °C 1270
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 8.5
47
Thermal Expansion, µm/m-K 14
12 to 13

Otherwise Unclassified Properties

Base Metal Price, % relative 100
2.4
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.2
1.5
Embodied Energy, MJ/kg 84
20
Embodied Water, L/kg 440
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
54 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 160
350 to 840
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
21 to 72
Strength to Weight: Bending, points 19
20 to 45
Thermal Diffusivity, mm2/s 2.2
13
Thermal Shock Resistance, points 14
19 to 61

Alloy Composition

Carbon (C), % 0.050 to 0.25
0.93 to 1.1
Chromium (Cr), % 27 to 30
1.4 to 1.6
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
96.5 to 97.3
Manganese (Mn), % 0 to 1.5
0.25 to 0.45
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 0.025
Silicon (Si), % 0.5 to 1.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.015