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Hot Finished AISI 310S vs. Hot Forged R30035 Cobalt

Hot finished AISI 310S belongs to the iron alloys classification, while hot forged R30035 cobalt belongs to the cobalt alloys. They have 41% of their average alloy composition in common. There are 26 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 hot finished AISI 310S and the bottom bar is hot forged R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
230
Fatigue Strength, MPa 250
500
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
89
Tensile Strength: Ultimate (UTS), MPa 600
1200
Tensile Strength: Yield (Proof), MPa 270
980

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1320
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 16
11
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 25
100
Density, g/cm3 7.9
8.7
Embodied Carbon, kg CO2/kg material 4.3
10
Embodied Energy, MJ/kg 61
140
Embodied Water, L/kg 190
410

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 190
2090
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
39
Strength to Weight: Bending, points 20
29
Thermal Diffusivity, mm2/s 4.1
3.0
Thermal Shock Resistance, points 14
29

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.080
0 to 0.025
Chromium (Cr), % 24 to 26
19 to 21
Cobalt (Co), % 0
29.1 to 39
Iron (Fe), % 48.3 to 57
0 to 1.0
Manganese (Mn), % 0 to 2.0
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 19 to 22
33 to 37
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 1.5
0 to 0.15
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 1.0