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AISI 310 Stainless Steel vs. R30155 Cobalt

Both AISI 310 stainless steel and R30155 cobalt 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 (4, in this case) are not shown.

For each property being compared, the top bar is AISI 310 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 220
220
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34 to 45
34
Fatigue Strength, MPa 240 to 280
310
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
81
Shear Strength, MPa 420 to 470
570
Tensile Strength: Ultimate (UTS), MPa 600 to 710
850
Tensile Strength: Yield (Proof), MPa 260 to 350
390

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 440
570
Maximum Temperature: Mechanical, °C 1040
1100
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 15
14

Otherwise Unclassified Properties

Base Metal Price, % relative 25
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 4.3
9.7
Embodied Energy, MJ/kg 61
150
Embodied Water, L/kg 190
300

Common Calculations

PREN (Pitting Resistance) 25
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 220
230
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21 to 25
28
Strength to Weight: Bending, points 20 to 22
24
Thermal Diffusivity, mm2/s 3.9
3.2
Thermal Shock Resistance, points 14 to 17
21

Alloy Composition

Carbon (C), % 0 to 0.25
0.080 to 0.16
Chromium (Cr), % 24 to 26
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 48.2 to 57
24.3 to 36.2
Manganese (Mn), % 0 to 2.0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 19 to 22
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0