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S28200 Stainless Steel vs. EN 2.4964 Cobalt

S28200 stainless steel belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is S28200 stainless steel and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 45
40
Fatigue Strength, MPa 430
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
86
Tensile Strength: Ultimate (UTS), MPa 870
960
Tensile Strength: Yield (Proof), MPa 460
390

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1380
1630
Melting Onset (Solidus), °C 1330
1550
Specific Heat Capacity, J/kg-K 480
400
Thermal Expansion, µm/m-K 18
12

Otherwise Unclassified Properties

Density, g/cm3 7.6
9.6
Embodied Carbon, kg CO2/kg material 2.8
9.8
Embodied Energy, MJ/kg 41
140
Embodied Water, L/kg 160
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 330
310
Resilience: Unit (Modulus of Resilience), kJ/m3 540
340
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
21
Strength to Weight: Axial, points 32
28
Strength to Weight: Bending, points 27
23
Thermal Shock Resistance, points 17
25

Alloy Composition

Carbon (C), % 0 to 0.15
0.050 to 0.15
Chromium (Cr), % 17 to 19
19 to 21
Cobalt (Co), % 0
46.4 to 58
Copper (Cu), % 0.75 to 1.3
0
Iron (Fe), % 57.7 to 64.1
0 to 3.0
Manganese (Mn), % 17 to 19
0 to 2.0
Molybdenum (Mo), % 0.75 to 1.3
0
Nickel (Ni), % 0
9.0 to 11
Nitrogen (N), % 0.4 to 0.6
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0
14 to 16