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Grade 366 Molybdenum vs. ASTM A369 Grade FP9

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while ASTM A369 grade FP9 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 ASTM A369 grade FP9.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
190
Elongation at Break, % 2.2
20
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 120
75
Tensile Strength: Ultimate (UTS), MPa 580
470
Tensile Strength: Yield (Proof), MPa 470
240

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Specific Heat Capacity, J/kg-K 210
480
Thermal Expansion, µm/m-K 7.6
13

Otherwise Unclassified Properties

Density, g/cm3 12
7.8
Embodied Carbon, kg CO2/kg material 27
2.0
Embodied Energy, MJ/kg 340
28
Embodied Water, L/kg 300
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
80
Resilience: Unit (Modulus of Resilience), kJ/m3 370
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 13
17
Strength to Weight: Bending, points 13
17
Thermal Shock Resistance, points 18
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 0
8.0 to 10
Iron (Fe), % 0 to 0.010
87.1 to 90.3
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 66.9 to 73
0.9 to 1.1
Nickel (Ni), % 0 to 0.0020
0
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
0.5 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 27 to 33
0