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Grade 366 Molybdenum vs. SAE-AISI A8 Steel

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while SAE-AISI A8 steel belongs to the iron alloys. 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 grade 366 molybdenum and the bottom bar is SAE-AISI A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
190
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 120
74
Tensile Strength: Ultimate (UTS), MPa 580
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Specific Heat Capacity, J/kg-K 210
470
Thermal Expansion, µm/m-K 7.6
12

Otherwise Unclassified Properties

Density, g/cm3 12
7.9
Embodied Carbon, kg CO2/kg material 27
2.3
Embodied Energy, MJ/kg 340
31
Embodied Water, L/kg 300
73

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 18
24
Strength to Weight: Axial, points 13
25 to 68
Strength to Weight: Bending, points 13
22 to 44
Thermal Shock Resistance, points 18
22 to 62

Alloy Composition

Carbon (C), % 0 to 0.030
0.5 to 0.6
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 0.010
88.5 to 91.9
Manganese (Mn), % 0
0 to 0.5
Molybdenum (Mo), % 66.9 to 73
1.2 to 1.7
Nickel (Ni), % 0 to 0.0020
0 to 0.3
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0025
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
0.75 to 1.1
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 27 to 33
1.0 to 1.5