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R30155 Cobalt vs. EN 1.4123 Stainless Steel

Both R30155 cobalt and EN 1.4123 stainless steel are iron alloys. They have 49% of their average alloy composition in common. There are 25 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 R30155 cobalt and the bottom bar is EN 1.4123 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 850
720 to 810

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
840
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
23
Thermal Expansion, µm/m-K 14
10

Otherwise Unclassified Properties

Base Metal Price, % relative 80
10
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 9.7
4.2
Embodied Energy, MJ/kg 150
62
Embodied Water, L/kg 300
120

Common Calculations

PREN (Pitting Resistance) 37
24
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
26 to 29
Strength to Weight: Bending, points 24
23 to 25
Thermal Diffusivity, mm2/s 3.2
6.3
Thermal Shock Resistance, points 21
26 to 29

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.35 to 0.5
Chromium (Cr), % 20 to 22.5
14 to 16.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
76.7 to 84.6
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
1.0 to 2.5
Nickel (Ni), % 19 to 21
0 to 0.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
0 to 1.5