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R30155 Cobalt vs. EN 1.4347 Stainless Steel

Both R30155 cobalt and EN 1.4347 stainless steel are iron alloys. They have 59% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
23
Fatigue Strength, MPa 310
320
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 81
79
Tensile Strength: Ultimate (UTS), MPa 850
660
Tensile Strength: Yield (Proof), MPa 390
480

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1470
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
16
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 9.7
3.1
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 300
170

Common Calculations

PREN (Pitting Resistance) 37
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
140
Resilience: Unit (Modulus of Resilience), kJ/m3 370
570
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
24
Strength to Weight: Bending, points 24
22
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.050
Chromium (Cr), % 20 to 22.5
25 to 27
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
62.2 to 69.4
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
5.5 to 7.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0.1 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.020
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0