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S21640 Stainless Steel vs. Grade 363 Molybdenum

S21640 stainless steel belongs to the iron alloys classification, while grade 363 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is grade 363 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
310
Elongation at Break, % 46
6.2 to 11
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 78
120
Tensile Strength: Ultimate (UTS), MPa 740
580 to 720
Tensile Strength: Yield (Proof), MPa 350
350 to 620

Thermal Properties

Latent Heat of Fusion, J/g 290
370
Specific Heat Capacity, J/kg-K 480
250
Thermal Expansion, µm/m-K 17
7.0

Otherwise Unclassified Properties

Density, g/cm3 7.7
10
Embodied Carbon, kg CO2/kg material 3.6
28
Embodied Energy, MJ/kg 51
330
Embodied Water, L/kg 150
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
43 to 57
Resilience: Unit (Modulus of Resilience), kJ/m3 300
200 to 630
Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 27
16 to 20
Strength to Weight: Bending, points 23
15 to 17
Thermal Shock Resistance, points 16
19 to 24

Alloy Composition

Carbon (C), % 0 to 0.080
0.010 to 0.030
Chromium (Cr), % 17.5 to 19.5
0
Iron (Fe), % 63 to 74.3
0 to 0.010
Manganese (Mn), % 3.5 to 6.5
0
Molybdenum (Mo), % 0.5 to 2.0
99.3 to 99.5
Nickel (Ni), % 4.0 to 6.5
0 to 0.0020
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0 to 0.0020
Oxygen (O), % 0
0 to 0.0030
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 0.010
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.4 to 0.55
Zirconium (Zr), % 0
0.060 to 0.12