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Cold Finished AISI 310S vs. Cold Worked R30605 Cobalt

Cold finished AISI 310S belongs to the iron alloys classification, while cold worked R30605 cobalt belongs to the cobalt alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is cold finished AISI 310S and the bottom bar is cold worked R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34
34
Fatigue Strength, MPa 280
590
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 710
1900
Tensile Strength: Yield (Proof), MPa 350
1600

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1400
1330
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 16
9.6
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.9
9.6
Embodied Carbon, kg CO2/kg material 4.3
9.8
Embodied Energy, MJ/kg 61
140
Embodied Water, L/kg 190
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 25
55
Strength to Weight: Bending, points 22
36
Thermal Diffusivity, mm2/s 4.1
2.5
Thermal Shock Resistance, points 16
52

Alloy Composition

Carbon (C), % 0 to 0.080
0.050 to 0.15
Chromium (Cr), % 24 to 26
19 to 21
Cobalt (Co), % 0
46.4 to 57
Iron (Fe), % 48.3 to 57
0 to 3.0
Manganese (Mn), % 0 to 2.0
1.0 to 2.0
Nickel (Ni), % 19 to 22
9.0 to 11
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
14 to 16