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SAE-AISI P20 Steel vs. Grade 366 Molybdenum

SAE-AISI P20 steel belongs to the iron alloys classification, while grade 366 molybdenum belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI P20 steel and the bottom bar is grade 366 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
300
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 73
120
Tensile Strength: Ultimate (UTS), MPa 540 to 1050
580

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Specific Heat Capacity, J/kg-K 470
210
Thermal Expansion, µm/m-K 12
7.6

Otherwise Unclassified Properties

Density, g/cm3 7.8
12
Embodied Carbon, kg CO2/kg material 1.6
27
Embodied Energy, MJ/kg 21
340
Embodied Water, L/kg 52
300

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 19 to 37
13
Strength to Weight: Bending, points 19 to 29
13
Thermal Shock Resistance, points 18 to 35
18

Alloy Composition

Carbon (C), % 0.28 to 0.4
0 to 0.030
Chromium (Cr), % 0.4 to 2.0
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 95.2 to 98.5
0 to 0.010
Manganese (Mn), % 0.35 to 0.71
0
Molybdenum (Mo), % 0.3 to 0.55
66.9 to 73
Nickel (Ni), % 0
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0025
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.8
0 to 0.010
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
27 to 33