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EN 1.4123 Stainless Steel vs. R30016 Cobalt

EN 1.4123 stainless steel belongs to the iron alloys classification, while R30016 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is EN 1.4123 stainless steel and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
85
Tensile Strength: Ultimate (UTS), MPa 720 to 810
1010

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1450
1360
Melting Onset (Solidus), °C 1410
1270
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 10
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.0

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.5
Embodied Carbon, kg CO2/kg material 4.2
7.7
Embodied Energy, MJ/kg 62
110
Embodied Water, L/kg 120
500

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26 to 29
33
Strength to Weight: Bending, points 23 to 25
26
Thermal Diffusivity, mm2/s 6.3
3.9
Thermal Shock Resistance, points 26 to 29
24

Alloy Composition

Carbon (C), % 0.35 to 0.5
0.9 to 1.4
Chromium (Cr), % 14 to 16.5
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Iron (Fe), % 76.7 to 84.6
0 to 3.0
Manganese (Mn), % 0 to 1.0
0.5 to 2.0
Molybdenum (Mo), % 1.0 to 2.5
0 to 1.5
Nickel (Ni), % 0 to 0.5
0 to 3.0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.2 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
3.5 to 5.5
Vanadium (V), % 0 to 1.5
0