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R30155 Cobalt vs. EN 1.4959 Stainless Steel

Both R30155 cobalt and EN 1.4959 stainless steel are iron alloys. They have 72% 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 1.4959 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 310
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 570
430
Tensile Strength: Ultimate (UTS), MPa 850
630
Tensile Strength: Yield (Proof), MPa 390
190

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
510
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1470
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 80
31
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 9.7
5.4
Embodied Energy, MJ/kg 150
76
Embodied Water, L/kg 300
200

Common Calculations

PREN (Pitting Resistance) 37
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
190
Resilience: Unit (Modulus of Resilience), kJ/m3 370
96
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
22
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 3.2
3.2
Thermal Shock Resistance, points 21
15

Alloy Composition

Aluminum (Al), % 0
0.25 to 0.65
Carbon (C), % 0.080 to 0.16
0.050 to 0.1
Chromium (Cr), % 20 to 22.5
19 to 22
Cobalt (Co), % 18.5 to 21
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 24.3 to 36.2
39.4 to 50.5
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
30 to 34
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.010
Tantalum (Ta), % 0.75 to 1.3
0
Titanium (Ti), % 0
0.25 to 0.65
Tungsten (W), % 2.0 to 3.0
0