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Grade 366 Molybdenum vs. ACI-ASTM CA40 Steel

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while ACI-ASTM CA40 steel belongs to the iron alloys. There are 20 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 ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
190
Elongation at Break, % 2.2
10
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 120
76
Tensile Strength: Ultimate (UTS), MPa 580
910
Tensile Strength: Yield (Proof), MPa 470
860

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Specific Heat Capacity, J/kg-K 210
480
Thermal Expansion, µm/m-K 7.6
10

Otherwise Unclassified Properties

Density, g/cm3 12
7.7
Embodied Carbon, kg CO2/kg material 27
2.0
Embodied Energy, MJ/kg 340
28
Embodied Water, L/kg 300
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
89
Resilience: Unit (Modulus of Resilience), kJ/m3 370
1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 13
33
Strength to Weight: Bending, points 13
27
Thermal Shock Resistance, points 18
33

Alloy Composition

Carbon (C), % 0 to 0.030
0.2 to 0.4
Chromium (Cr), % 0
11.5 to 14
Iron (Fe), % 0 to 0.010
81.5 to 88.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 66.9 to 73
0 to 0.5
Nickel (Ni), % 0 to 0.0020
0 to 1.0
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0025
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Tungsten (W), % 27 to 33
0