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EN 1.4659 Stainless Steel vs. R30155 Cobalt

Both EN 1.4659 stainless steel and R30155 cobalt are iron alloys. They have 78% of their average alloy composition in common. There are 31 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 EN 1.4659 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
220
Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 49
34
Fatigue Strength, MPa 460
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
81
Shear Strength, MPa 640
570
Tensile Strength: Ultimate (UTS), MPa 900
850
Tensile Strength: Yield (Proof), MPa 480
390

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 440
570
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1480
1470
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 37
80
Density, g/cm3 8.2
8.5
Embodied Carbon, kg CO2/kg material 6.5
9.7
Embodied Energy, MJ/kg 89
150
Embodied Water, L/kg 220
300

Common Calculations

PREN (Pitting Resistance) 54
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 370
230
Resilience: Unit (Modulus of Resilience), kJ/m3 550
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 31
28
Strength to Weight: Bending, points 25
24
Thermal Diffusivity, mm2/s 3.2
3.2
Thermal Shock Resistance, points 19
21

Alloy Composition

Carbon (C), % 0 to 0.020
0.080 to 0.16
Chromium (Cr), % 23 to 25
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 1.0 to 2.0
0
Iron (Fe), % 35.7 to 45.7
24.3 to 36.2
Manganese (Mn), % 2.0 to 4.0
1.0 to 2.0
Molybdenum (Mo), % 5.5 to 6.5
2.5 to 3.5
Nickel (Ni), % 21 to 23
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0.35 to 0.5
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 1.5 to 2.5
2.0 to 3.0