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S44635 Stainless Steel vs. G-CoCr28 Cobalt

S44635 stainless steel belongs to the iron alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. They have 46% of their average alloy composition in common. There are 27 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 S44635 stainless steel and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 23
6.7
Fatigue Strength, MPa 390
130
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
83
Tensile Strength: Ultimate (UTS), MPa 710
560
Tensile Strength: Yield (Proof), MPa 580
260

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Mechanical, °C 1100
1200
Melting Completion (Liquidus), °C 1460
1330
Melting Onset (Solidus), °C 1420
1270
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
8.5
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Base Metal Price, % relative 22
100
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.4
6.2
Embodied Energy, MJ/kg 62
84
Embodied Water, L/kg 170
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
31
Resilience: Unit (Modulus of Resilience), kJ/m3 810
160
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 4.4
2.2
Thermal Shock Resistance, points 23
14

Alloy Composition

Carbon (C), % 0 to 0.025
0.050 to 0.25
Chromium (Cr), % 24.5 to 26
27 to 30
Cobalt (Co), % 0
48 to 52
Iron (Fe), % 61.5 to 68.5
9.7 to 24.5
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 3.5 to 4.5
0 to 0.5
Nickel (Ni), % 3.5 to 4.5
0 to 4.0
Niobium (Nb), % 0.2 to 0.8
0 to 0.5
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.75
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.2 to 0.8
0