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Grade 366 Molybdenum vs. S32808 Stainless Steel

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while S32808 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 S32808 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
210
Elongation at Break, % 2.2
17
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 120
81
Tensile Strength: Ultimate (UTS), MPa 580
780
Tensile Strength: Yield (Proof), MPa 470
570

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Specific Heat Capacity, J/kg-K 210
480
Thermal Expansion, µm/m-K 7.6
13

Otherwise Unclassified Properties

Density, g/cm3 12
7.9
Embodied Carbon, kg CO2/kg material 27
4.0
Embodied Energy, MJ/kg 340
57
Embodied Water, L/kg 300
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 13
27
Strength to Weight: Bending, points 13
24
Thermal Shock Resistance, points 18
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 0
27 to 27.9
Iron (Fe), % 0 to 0.010
58.1 to 62.8
Manganese (Mn), % 0
0 to 1.1
Molybdenum (Mo), % 66.9 to 73
0.8 to 1.2
Nickel (Ni), % 0 to 0.0020
7.0 to 8.2
Nitrogen (N), % 0 to 0.0020
0.3 to 0.4
Oxygen (O), % 0 to 0.0025
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Tungsten (W), % 27 to 33
2.1 to 2.5