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R30155 Cobalt vs. EN 1.4423 Stainless Steel

Both R30155 cobalt and EN 1.4423 stainless steel are iron alloys. They have 53% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4423 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
17
Fatigue Strength, MPa 310
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 570
520
Tensile Strength: Ultimate (UTS), MPa 850
850
Tensile Strength: Yield (Proof), MPa 390
630

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
780
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 14
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 80
14
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
3.2
Embodied Energy, MJ/kg 150
43
Embodied Water, L/kg 300
120

Common Calculations

PREN (Pitting Resistance) 37
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
130
Resilience: Unit (Modulus of Resilience), kJ/m3 370
1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
30
Strength to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 3.2
4.3
Thermal Shock Resistance, points 21
31

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.020
Chromium (Cr), % 20 to 22.5
11 to 13
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 24.3 to 36.2
73.8 to 80.5
Manganese (Mn), % 1.0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
2.3 to 2.8
Nickel (Ni), % 19 to 21
6.0 to 7.0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0 to 0.020
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.0030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0