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R30155 Cobalt vs. EN 1.4874 Stainless Steel

Both R30155 cobalt and EN 1.4874 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4874 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
140
Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 34
6.7
Fatigue Strength, MPa 310
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
80
Tensile Strength: Ultimate (UTS), MPa 850
480
Tensile Strength: Yield (Proof), MPa 390
360

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
560
Maximum Temperature: Mechanical, °C 1100
1150
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 12
13
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 80
70
Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 9.7
7.6
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 300
290

Common Calculations

PREN (Pitting Resistance) 37
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
29
Resilience: Unit (Modulus of Resilience), kJ/m3 370
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
16
Strength to Weight: Bending, points 24
16
Thermal Diffusivity, mm2/s 3.2
3.3
Thermal Shock Resistance, points 21
11

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.35 to 0.65
Chromium (Cr), % 20 to 22.5
19 to 22
Cobalt (Co), % 18.5 to 21
18.5 to 22
Iron (Fe), % 24.3 to 36.2
23 to 38.9
Manganese (Mn), % 1.0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
2.5 to 3.0
Nickel (Ni), % 19 to 21
18 to 22
Niobium (Nb), % 0.75 to 1.3
0.75 to 1.3
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
2.0 to 3.0