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EN 1.4615 Stainless Steel vs. R30155 Cobalt

Both EN 1.4615 stainless steel and R30155 cobalt are iron alloys. They have 53% 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 1.4615 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
220
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 50
34
Fatigue Strength, MPa 190
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
81
Shear Strength, MPa 360
570
Tensile Strength: Ultimate (UTS), MPa 500
850
Tensile Strength: Yield (Proof), MPa 200
390

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 400
570
Maximum Temperature: Mechanical, °C 840
1100
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 17
14

Otherwise Unclassified Properties

Base Metal Price, % relative 13
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 2.8
9.7
Embodied Energy, MJ/kg 40
150
Embodied Water, L/kg 140
300

Common Calculations

PREN (Pitting Resistance) 17
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
230
Resilience: Unit (Modulus of Resilience), kJ/m3 99
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 18
28
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 4.1
3.2
Thermal Shock Resistance, points 11
21

Alloy Composition

Carbon (C), % 0 to 0.030
0.080 to 0.16
Chromium (Cr), % 14 to 16
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 2.0 to 4.0
0
Iron (Fe), % 63.1 to 72.5
24.3 to 36.2
Manganese (Mn), % 7.0 to 9.0
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.8
2.5 to 3.5
Nickel (Ni), % 4.5 to 6.0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0.020 to 0.060
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0