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EN 2.4964 Cobalt vs. EN 1.4378 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while EN 1.4378 stainless steel belongs to the iron alloys. They have a modest 24% 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 (10, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 40
14 to 34
Fatigue Strength, MPa 220
340 to 550
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 960
760 to 1130
Tensile Strength: Yield (Proof), MPa 390
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1630
1390
Melting Onset (Solidus), °C 1550
1350
Specific Heat Capacity, J/kg-K 400
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.6
Embodied Carbon, kg CO2/kg material 9.8
2.7
Embodied Energy, MJ/kg 140
39
Embodied Water, L/kg 450
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 340
470 to 2370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
28 to 41
Strength to Weight: Bending, points 23
24 to 31
Thermal Shock Resistance, points 25
16 to 23

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.080
Chromium (Cr), % 19 to 21
17 to 19
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
61.2 to 69
Manganese (Mn), % 0 to 2.0
11.5 to 14.5
Nickel (Ni), % 9.0 to 11
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.020
0 to 0.060
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 14 to 16
0