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EN 1.4567 Stainless Steel vs. R30012 Cobalt

EN 1.4567 stainless steel belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 22% 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 EN 1.4567 stainless steel and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 22 to 51
1.0
Fatigue Strength, MPa 190 to 260
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 550 to 780
830
Tensile Strength: Yield (Proof), MPa 200 to 390
650

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1410
1470
Melting Onset (Solidus), °C 1370
1280
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 3.1
8.3
Embodied Energy, MJ/kg 43
120
Embodied Water, L/kg 150
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 100 to 400
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 19 to 27
26
Strength to Weight: Bending, points 19 to 24
22
Thermal Diffusivity, mm2/s 3.0
3.8
Thermal Shock Resistance, points 12 to 17
23

Alloy Composition

Carbon (C), % 0 to 0.040
1.4 to 2.0
Chromium (Cr), % 17 to 19
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 63.3 to 71.5
0 to 3.0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 8.5 to 10.5
0 to 3.0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 0
7.5 to 9.5