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Hot Rolled SAE-AISI 1552 vs. Hot Worked R31538 Cobalt

Hot rolled SAE-AISI 1552 belongs to the iron alloys classification, while hot worked R31538 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is hot rolled SAE-AISI 1552 and the bottom bar is hot worked R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 14
13
Fatigue Strength, MPa 290
410
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
14
Shear Modulus, GPa 72
86
Tensile Strength: Ultimate (UTS), MPa 840
1120
Tensile Strength: Yield (Proof), MPa 460
800

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1290
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 51
13
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 1.4
8.1
Embodied Energy, MJ/kg 19
110
Embodied Water, L/kg 47
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98
140
Resilience: Unit (Modulus of Resilience), kJ/m3 560
1430
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 30
37
Strength to Weight: Bending, points 25
28
Thermal Diffusivity, mm2/s 14
3.5
Thermal Shock Resistance, points 29
27

Alloy Composition

Carbon (C), % 0.47 to 0.55
0.15 to 0.35
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Iron (Fe), % 97.9 to 98.3
0 to 0.75
Manganese (Mn), % 1.2 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0