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AISI 334 Stainless Steel vs. Grade 366 Molybdenum

AISI 334 stainless steel belongs to the iron alloys classification, while grade 366 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is AISI 334 stainless steel and the bottom bar is grade 366 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
300
Elongation at Break, % 34
2.2
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 77
120
Tensile Strength: Ultimate (UTS), MPa 540
580
Tensile Strength: Yield (Proof), MPa 190
470

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Specific Heat Capacity, J/kg-K 480
210
Thermal Expansion, µm/m-K 16
7.6

Otherwise Unclassified Properties

Density, g/cm3 7.9
12
Embodied Carbon, kg CO2/kg material 4.1
27
Embodied Energy, MJ/kg 59
340
Embodied Water, L/kg 170
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
12
Resilience: Unit (Modulus of Resilience), kJ/m3 96
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 19
13
Strength to Weight: Bending, points 19
13
Thermal Shock Resistance, points 12
18

Alloy Composition

Aluminum (Al), % 0.15 to 0.6
0
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 20
0
Iron (Fe), % 55.7 to 62.7
0 to 0.010
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0
66.9 to 73
Nickel (Ni), % 19 to 21
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0025
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0 to 0.010
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.15 to 0.6
0
Tungsten (W), % 0
27 to 33