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R30003 Cobalt vs. EN 1.4123 Stainless Steel

R30003 cobalt belongs to the cobalt alloys classification, while EN 1.4123 stainless steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 R30003 cobalt and the bottom bar is EN 1.4123 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
720 to 810

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1440
1410
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
23
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 95
10
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.0
4.2
Embodied Energy, MJ/kg 110
62
Embodied Water, L/kg 400
120

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32 to 57
26 to 29
Strength to Weight: Bending, points 26 to 38
23 to 25
Thermal Diffusivity, mm2/s 3.3
6.3
Thermal Shock Resistance, points 26 to 45
26 to 29

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0.35 to 0.5
Chromium (Cr), % 19 to 21
14 to 16.5
Cobalt (Co), % 39 to 41
0
Iron (Fe), % 10 to 20.5
76.7 to 84.6
Manganese (Mn), % 1.5 to 2.5
0 to 1.0
Molybdenum (Mo), % 6.0 to 8.0
1.0 to 2.5
Nickel (Ni), % 14 to 16
0 to 0.5
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0
0 to 1.5

Comparable Variants