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Grade 366 Molybdenum vs. S44635 Stainless Steel

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while S44635 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 S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
210
Elongation at Break, % 2.2
23
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 120
81
Tensile Strength: Ultimate (UTS), MPa 580
710
Tensile Strength: Yield (Proof), MPa 470
580

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Specific Heat Capacity, J/kg-K 210
470
Thermal Expansion, µm/m-K 7.6
11

Otherwise Unclassified Properties

Density, g/cm3 12
7.8
Embodied Carbon, kg CO2/kg material 27
4.4
Embodied Energy, MJ/kg 340
62
Embodied Water, L/kg 300
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
150
Resilience: Unit (Modulus of Resilience), kJ/m3 370
810
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 13
25
Strength to Weight: Bending, points 13
23
Thermal Shock Resistance, points 18
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 0
24.5 to 26
Iron (Fe), % 0 to 0.010
61.5 to 68.5
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 66.9 to 73
3.5 to 4.5
Nickel (Ni), % 0 to 0.0020
3.5 to 4.5
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0 to 0.0020
0 to 0.035
Oxygen (O), % 0 to 0.0025
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8
Tungsten (W), % 27 to 33
0