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Grade 366 Molybdenum vs. S44330 Stainless Steel

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while S44330 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is grade 366 molybdenum and the bottom bar is S44330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
200
Elongation at Break, % 2.2
25
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 120
78
Tensile Strength: Ultimate (UTS), MPa 580
440
Tensile Strength: Yield (Proof), MPa 470
230

Thermal Properties

Latent Heat of Fusion, J/g 310
290
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
2.8
Embodied Energy, MJ/kg 340
40
Embodied Water, L/kg 300
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
91
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
16
Strength to Weight: Bending, points 13
17
Thermal Shock Resistance, points 18
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0
0.3 to 0.8
Iron (Fe), % 0 to 0.010
72.5 to 79.7
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 66.9 to 73
0
Nickel (Ni), % 0 to 0.0020
0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0 to 0.0020
0 to 0.025
Oxygen (O), % 0 to 0.0025
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0 to 0.8
Tungsten (W), % 27 to 33
0