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R30012 Cobalt vs. EN 1.4507 Stainless Steel

R30012 cobalt belongs to the cobalt alloys classification, while EN 1.4507 stainless steel belongs to the iron alloys. They have a modest 29% 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 (9, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is EN 1.4507 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
25
Fatigue Strength, MPa 320
410
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 86
80
Tensile Strength: Ultimate (UTS), MPa 830
840
Tensile Strength: Yield (Proof), MPa 650
590

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1280
1390
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.5

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.8
Embodied Carbon, kg CO2/kg material 8.3
4.0
Embodied Energy, MJ/kg 120
55
Embodied Water, L/kg 480
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
190
Resilience: Unit (Modulus of Resilience), kJ/m3 960
850
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
30
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 3.8
4.0
Thermal Shock Resistance, points 23
23

Alloy Composition

Carbon (C), % 1.4 to 2.0
0 to 0.030
Chromium (Cr), % 27 to 32
24 to 26
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 0 to 3.0
56.4 to 65.8
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0 to 1.0
3.0 to 4.0
Nickel (Ni), % 0 to 3.0
6.0 to 8.0
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 2.0
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 7.5 to 9.5
0