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R30155 Cobalt vs. EN 1.4877 Stainless Steel

Both R30155 cobalt and EN 1.4877 stainless steel are iron alloys. They have 73% 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 1.4877 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
36
Fatigue Strength, MPa 310
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
79
Shear Strength, MPa 570
420
Tensile Strength: Ultimate (UTS), MPa 850
630
Tensile Strength: Yield (Proof), MPa 390
200

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 570
560
Maximum Temperature: Mechanical, °C 1100
1150
Melting Completion (Liquidus), °C 1470
1400
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 80
37
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 9.7
6.2
Embodied Energy, MJ/kg 150
89
Embodied Water, L/kg 300
220

Common Calculations

PREN (Pitting Resistance) 37
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
180
Resilience: Unit (Modulus of Resilience), kJ/m3 370
100
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 to 0.025
Carbon (C), % 0.080 to 0.16
0.040 to 0.080
Cerium (Ce), % 0
0.050 to 0.1
Chromium (Cr), % 20 to 22.5
26 to 28
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
36.4 to 42.3
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
31 to 33
Niobium (Nb), % 0.75 to 1.3
0.6 to 1.0
Nitrogen (N), % 0 to 0.2
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.010
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0