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R30012 Cobalt vs. EN 1.4112 Stainless Steel

R30012 cobalt belongs to the cobalt alloys classification, while EN 1.4112 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 (8, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is EN 1.4112 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
20
Fatigue Strength, MPa 320
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 830
750
Tensile Strength: Yield (Proof), MPa 650
430

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1280
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 12
10

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
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.6
Embodied Energy, MJ/kg 120
37
Embodied Water, L/kg 480
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
130
Resilience: Unit (Modulus of Resilience), kJ/m3 960
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
27
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 3.8
4.1
Thermal Shock Resistance, points 23
26

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.85 to 1.0
Chromium (Cr), % 27 to 32
17 to 19
Cobalt (Co), % 47.5 to 64.1
0
Iron (Fe), % 0 to 3.0
76.6 to 81.2
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
0.9 to 1.3
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 7.5 to 9.5
0
Vanadium (V), % 0
0.070 to 0.12