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Grade 363 Molybdenum vs. S44800 Stainless Steel

Grade 363 molybdenum belongs to the otherwise unclassified metals classification, while S44800 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is grade 363 molybdenum and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 310
210
Elongation at Break, % 6.2 to 11
23
Poisson's Ratio 0.31
0.27
Shear Modulus, GPa 120
82
Tensile Strength: Ultimate (UTS), MPa 580 to 720
590
Tensile Strength: Yield (Proof), MPa 350 to 620
450

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Specific Heat Capacity, J/kg-K 250
480
Thermal Expansion, µm/m-K 7.0
11

Otherwise Unclassified Properties

Density, g/cm3 10
7.8
Embodied Carbon, kg CO2/kg material 28
3.8
Embodied Energy, MJ/kg 330
52
Embodied Water, L/kg 360
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 43 to 57
120
Resilience: Unit (Modulus of Resilience), kJ/m3 200 to 630
480
Stiffness to Weight: Axial, points 17
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 16 to 20
21
Strength to Weight: Bending, points 15 to 17
20
Thermal Shock Resistance, points 19 to 24
19

Alloy Composition

Carbon (C), % 0.010 to 0.030
0 to 0.010
Chromium (Cr), % 0
28 to 30
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 0 to 0.010
62.6 to 66.5
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 99.3 to 99.5
3.5 to 4.2
Nickel (Ni), % 0 to 0.0020
2.0 to 2.5
Nitrogen (N), % 0 to 0.0020
0 to 0.020
Oxygen (O), % 0 to 0.0030
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.010
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0.4 to 0.55
0
Zirconium (Zr), % 0.060 to 0.12
0