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R30155 Cobalt vs. EN 1.4477 Stainless Steel

Both R30155 cobalt and EN 1.4477 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 31 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 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
270
Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 34
22 to 23
Fatigue Strength, MPa 310
420 to 490
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 81
81
Shear Strength, MPa 570
550 to 580
Tensile Strength: Ultimate (UTS), MPa 850
880 to 930
Tensile Strength: Yield (Proof), MPa 390
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
13
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
20
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 9.7
3.7
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 300
190

Common Calculations

PREN (Pitting Resistance) 37
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 370
940 to 1290
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
31 to 33
Strength to Weight: Bending, points 24
26 to 27
Thermal Diffusivity, mm2/s 3.2
3.5
Thermal Shock Resistance, points 21
23 to 25

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.030
Chromium (Cr), % 20 to 22.5
28 to 30
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 24.3 to 36.2
56.6 to 63.6
Manganese (Mn), % 1.0 to 2.0
0.8 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
1.5 to 2.6
Nickel (Ni), % 19 to 21
5.8 to 7.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0.3 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
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