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S44735 Stainless Steel vs. EN 2.4964 Cobalt

S44735 stainless steel belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. They have a modest 23% 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 S44735 stainless steel and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 21
40
Fatigue Strength, MPa 300
220
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 82
86
Tensile Strength: Ultimate (UTS), MPa 630
960
Tensile Strength: Yield (Proof), MPa 460
390

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Melting Completion (Liquidus), °C 1460
1630
Melting Onset (Solidus), °C 1420
1550
Specific Heat Capacity, J/kg-K 480
400
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Density, g/cm3 7.7
9.6
Embodied Carbon, kg CO2/kg material 4.4
9.8
Embodied Energy, MJ/kg 61
140
Embodied Water, L/kg 180
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
310
Resilience: Unit (Modulus of Resilience), kJ/m3 520
340
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
21
Strength to Weight: Axial, points 23
28
Strength to Weight: Bending, points 21
23
Thermal Shock Resistance, points 20
25

Alloy Composition

Carbon (C), % 0 to 0.030
0.050 to 0.15
Chromium (Cr), % 28 to 30
19 to 21
Cobalt (Co), % 0
46.4 to 58
Iron (Fe), % 60.7 to 68.4
0 to 3.0
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 3.6 to 4.2
0
Nickel (Ni), % 0 to 1.0
9.0 to 11
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0.2 to 1.0
0
Tungsten (W), % 0
14 to 16