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G-CoCr28 Cobalt vs. AISI 334 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 334 stainless steel belongs to the iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is AISI 334 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
34
Fatigue Strength, MPa 130
150
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
540
Tensile Strength: Yield (Proof), MPa 260
190

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 1200
1000
Melting Completion (Liquidus), °C 1330
1410
Melting Onset (Solidus), °C 1270
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 100
22
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.2
4.1
Embodied Energy, MJ/kg 84
59
Embodied Water, L/kg 440
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
140
Resilience: Unit (Modulus of Resilience), kJ/m3 160
96
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
19
Thermal Shock Resistance, points 14
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.050 to 0.25
0 to 0.080
Chromium (Cr), % 27 to 30
18 to 20
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
55.7 to 62.7
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
19 to 21
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
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