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EN 1.4849 Stainless Steel vs. EN 2.4964 Cobalt

EN 1.4849 stainless steel belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 EN 1.4849 stainless steel and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 4.5
40
Fatigue Strength, MPa 120
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 480
960
Tensile Strength: Yield (Proof), MPa 250
390

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1390
1630
Melting Onset (Solidus), °C 1340
1550
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Density, g/cm3 8.0
9.6
Embodied Carbon, kg CO2/kg material 7.1
9.8
Embodied Energy, MJ/kg 100
140
Embodied Water, L/kg 200
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18
310
Resilience: Unit (Modulus of Resilience), kJ/m3 160
340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 17
28
Strength to Weight: Bending, points 17
23
Thermal Diffusivity, mm2/s 3.2
3.9
Thermal Shock Resistance, points 11
25

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.050 to 0.15
Chromium (Cr), % 18 to 21
19 to 21
Cobalt (Co), % 0
46.4 to 58
Iron (Fe), % 32.6 to 43.5
0 to 3.0
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 36 to 39
9.0 to 11
Niobium (Nb), % 1.2 to 1.8
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 1.0 to 2.5
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0
14 to 16