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R30006 Cobalt vs. EN 1.4372 Stainless Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.4372 stainless steel belongs to the iron alloys. They have a modest 21% 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 (10, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is EN 1.4372 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
47
Fatigue Strength, MPa 260
330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 900
790
Tensile Strength: Yield (Proof), MPa 540
350

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1290
1370
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 7.8
2.6
Embodied Energy, MJ/kg 110
38
Embodied Water, L/kg 500
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
310
Resilience: Unit (Modulus of Resilience), kJ/m3 670
320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
29
Strength to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 26
17

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.15
Chromium (Cr), % 27 to 32
16 to 18
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
67.5 to 75
Manganese (Mn), % 0
5.5 to 7.5
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
3.5 to 5.5
Nitrogen (N), % 0
0.050 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 4.0 to 6.0
0