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EN 2.4964 Cobalt vs. AISI 302 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while AISI 302 stainless steel belongs to the iron alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. 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 EN 2.4964 cobalt and the bottom bar is AISI 302 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 40
4.5 to 46
Fatigue Strength, MPa 220
210 to 520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 960
580 to 1430
Tensile Strength: Yield (Proof), MPa 390
230 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Melting Completion (Liquidus), °C 1630
1420
Melting Onset (Solidus), °C 1550
1400
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.8

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
3.0
Embodied Energy, MJ/kg 140
42
Embodied Water, L/kg 450
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
59 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 340
140 to 3070
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
21 to 51
Strength to Weight: Bending, points 23
20 to 36
Thermal Diffusivity, mm2/s 3.9
4.4
Thermal Shock Resistance, points 25
12 to 31

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 19 to 21
17 to 19
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
67.9 to 75
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 9.0 to 11
8.0 to 10
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 14 to 16
0