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Grade 366 Molybdenum vs. AISI 409 Stainless Steel

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while AISI 409 stainless 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 AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
190
Elongation at Break, % 2.2
24
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 120
75
Tensile Strength: Ultimate (UTS), MPa 580
420
Tensile Strength: Yield (Proof), MPa 470
200

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
11

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
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
83
Resilience: Unit (Modulus of Resilience), kJ/m3 370
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 13
15
Strength to Weight: Bending, points 13
16
Thermal Shock Resistance, points 18
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 0
10.5 to 11.7
Iron (Fe), % 0 to 0.010
84.9 to 89.5
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 66.9 to 73
0
Nickel (Ni), % 0 to 0.0020
0 to 0.5
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0025
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.010
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0 to 0.75
Tungsten (W), % 27 to 33
0