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R30155 Cobalt vs. EN 1.4762 Stainless Steel

Both R30155 cobalt and EN 1.4762 stainless steel 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 (3, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4762 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
13
Fatigue Strength, MPa 310
180
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 81
78
Shear Strength, MPa 570
370
Tensile Strength: Ultimate (UTS), MPa 850
620
Tensile Strength: Yield (Proof), MPa 390
310

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
440
Maximum Temperature: Mechanical, °C 1100
1150
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
17
Thermal Expansion, µm/m-K 14
10

Otherwise Unclassified Properties

Base Metal Price, % relative 80
12
Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 9.7
2.5
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 300
170

Common Calculations

PREN (Pitting Resistance) 37
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
67
Resilience: Unit (Modulus of Resilience), kJ/m3 370
250
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
26
Strength to Weight: Axial, points 28
23
Strength to Weight: Bending, points 24
21
Thermal Diffusivity, mm2/s 3.2
4.6
Thermal Shock Resistance, points 21
22

Alloy Composition

Aluminum (Al), % 0
1.2 to 1.7
Carbon (C), % 0.080 to 0.16
0 to 0.12
Chromium (Cr), % 20 to 22.5
23 to 26
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
69.7 to 75.1
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0.7 to 1.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0