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R30155 Cobalt vs. AISI 310S Stainless Steel

Both R30155 cobalt and AISI 310S 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 AISI 310S stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
34 to 44
Fatigue Strength, MPa 310
250 to 280
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 81
79
Shear Strength, MPa 570
420 to 470
Tensile Strength: Ultimate (UTS), MPa 850
600 to 710
Tensile Strength: Yield (Proof), MPa 390
270 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 570
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 80
25
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
4.3
Embodied Energy, MJ/kg 150
61
Embodied Water, L/kg 300
190

Common Calculations

PREN (Pitting Resistance) 37
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
200 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 370
190 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
21 to 25
Strength to Weight: Bending, points 24
20 to 22
Thermal Diffusivity, mm2/s 3.2
4.1
Thermal Shock Resistance, points 21
14 to 16

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.080
Chromium (Cr), % 20 to 22.5
24 to 26
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
48.3 to 57
Manganese (Mn), % 1.0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
19 to 22
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.5
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