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EN 1.4123 Stainless Steel vs. R30001 Cobalt

EN 1.4123 stainless steel belongs to the iron alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 22 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 EN 1.4123 stainless steel and the bottom bar is R30001 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
86
Tensile Strength: Ultimate (UTS), MPa 720 to 810
620

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1450
1530
Melting Onset (Solidus), °C 1410
1260
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.7
9.0
Embodied Carbon, kg CO2/kg material 4.2
8.9
Embodied Energy, MJ/kg 62
130
Embodied Water, L/kg 120
460

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 26 to 29
19
Strength to Weight: Bending, points 23 to 25
18
Thermal Diffusivity, mm2/s 6.3
3.7
Thermal Shock Resistance, points 26 to 29
19

Alloy Composition

Carbon (C), % 0.35 to 0.5
2.0 to 3.0
Chromium (Cr), % 14 to 16.5
28 to 32
Cobalt (Co), % 0
43 to 59
Iron (Fe), % 76.7 to 84.6
0 to 3.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 1.0 to 2.5
0 to 1.0
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 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
11 to 13
Vanadium (V), % 0 to 1.5
0