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R30155 Cobalt vs. EN 1.4901 Stainless Steel

Both R30155 cobalt and EN 1.4901 stainless steel are iron alloys. They have 43% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4901 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
19
Fatigue Strength, MPa 310
310
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
76
Shear Strength, MPa 570
460
Tensile Strength: Ultimate (UTS), MPa 850
740
Tensile Strength: Yield (Proof), MPa 390
490

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Maximum Temperature: Corrosion, °C 570
380
Maximum Temperature: Mechanical, °C 1100
650
Melting Completion (Liquidus), °C 1470
1490
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
26
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
11
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 300
89

Common Calculations

PREN (Pitting Resistance) 37
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
620
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
26
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 3.2
6.9
Thermal Shock Resistance, points 21
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0.080 to 0.16
0.070 to 0.13
Chromium (Cr), % 20 to 22.5
8.5 to 9.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
85.8 to 89.1
Manganese (Mn), % 1.0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0.3 to 0.6
Nickel (Ni), % 19 to 21
0 to 0.4
Niobium (Nb), % 0.75 to 1.3
0.040 to 0.090
Nitrogen (N), % 0 to 0.2
0.030 to 0.070
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Tantalum (Ta), % 0.75 to 1.3
0
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 2.0 to 3.0
1.5 to 2.0
Vanadium (V), % 0
0.15 to 0.25
Zirconium (Zr), % 0
0 to 0.010