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S35315 Stainless Steel vs. G-CoCr28 Cobalt

S35315 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 S35315 stainless steel and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 46
6.7
Fatigue Strength, MPa 280
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
83
Tensile Strength: Ultimate (UTS), MPa 740
560
Tensile Strength: Yield (Proof), MPa 300
260

Thermal Properties

Latent Heat of Fusion, J/g 330
320
Maximum Temperature: Mechanical, °C 1100
1200
Melting Completion (Liquidus), °C 1370
1330
Melting Onset (Solidus), °C 1330
1270
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
8.5
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 34
100
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 5.7
6.2
Embodied Energy, MJ/kg 81
84
Embodied Water, L/kg 220
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
31
Resilience: Unit (Modulus of Resilience), kJ/m3 230
160
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 3.1
2.2
Thermal Shock Resistance, points 17
14

Alloy Composition

Carbon (C), % 0.040 to 0.080
0.050 to 0.25
Cerium (Ce), % 0.030 to 0.1
0
Chromium (Cr), % 24 to 26
27 to 30
Cobalt (Co), % 0
48 to 52
Iron (Fe), % 33.6 to 40.6
9.7 to 24.5
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 34 to 36
0 to 4.0
Niobium (Nb), % 0
0 to 0.5
Nitrogen (N), % 0.12 to 0.18
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.2 to 2.0
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030