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R30155 Cobalt vs. EN 1.4031 Stainless Steel

Both R30155 cobalt and EN 1.4031 stainless steel are iron alloys. They have 45% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
11 to 13
Fatigue Strength, MPa 310
220 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
76
Shear Strength, MPa 570
400 to 540
Tensile Strength: Ultimate (UTS), MPa 850
670 to 900
Tensile Strength: Yield (Proof), MPa 390
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
770
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
30
Thermal Expansion, µm/m-K 14
11

Otherwise Unclassified Properties

Base Metal Price, % relative 80
7.0
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 9.7
1.9
Embodied Energy, MJ/kg 150
27
Embodied Water, L/kg 300
100

Common Calculations

PREN (Pitting Resistance) 37
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 370
380 to 1360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
24 to 32
Strength to Weight: Bending, points 24
22 to 27
Thermal Diffusivity, mm2/s 3.2
8.1
Thermal Shock Resistance, points 21
23 to 32

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.36 to 0.42
Chromium (Cr), % 20 to 22.5
12.5 to 14.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
83 to 87.1
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
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 0.015
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0