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R30155 Cobalt vs. EN 1.4807 Stainless Steel

Both R30155 cobalt and EN 1.4807 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 1.4807 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
140
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
4.5
Fatigue Strength, MPa 310
120
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
75
Tensile Strength: Ultimate (UTS), MPa 850
480
Tensile Strength: Yield (Proof), MPa 390
250

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 570
600
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1470
1390
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
39
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 9.7
6.8
Embodied Energy, MJ/kg 150
97
Embodied Water, L/kg 300
190

Common Calculations

PREN (Pitting Resistance) 37
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
18
Resilience: Unit (Modulus of Resilience), kJ/m3 370
160
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
17
Strength to Weight: Bending, points 24
17
Thermal Diffusivity, mm2/s 3.2
3.2
Thermal Shock Resistance, points 21
12

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.3 to 0.5
Chromium (Cr), % 20 to 22.5
17 to 20
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
36.6 to 46.7
Manganese (Mn), % 1.0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
0 to 0.5
Nickel (Ni), % 19 to 21
34 to 36
Niobium (Nb), % 0.75 to 1.3
1.0 to 1.8
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
1.0 to 2.5
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
0