Alloy Steel 4330 M, also known as AISI 4330 M, is a high-strength, chromium, nickel, and molybdenum alloy with great toughness and tensile properties. Alloy Steel 4330 M is heat-treatable, and offers good formability and machinability with terrific cold working characteristics. The alloy is machinable in the annealed, normalized, and tempered conditions, but not as easily in a hardened condition. Applications for 4330 M include aircraft and power transmission components, machinery, and bolting.



4340 M Alloy Steel Grade Chemistry
Fe Ni Mn Si Cr Mo C
MIN 95.3 1.0 0.40 0.30 0.20
MAX 98.1 1.5 1.0 0.80 0.60 0.50 0.30



Flat Bar
Round Bar

Incoming Stock

Description Form Thickness / Diameter Width Length Pieces Weight Available Supplier Estimated Due Date
3.000" 4330M (4330V) ALLOY STEEL ROUND BARRound Bar3.000"--144.000"82303.3Latrobe Specialty Metals Company10/25/2019ALLOY STEEL4330M
4.375" 4330M (4330V) ALLOY STEEL ROUND BARRound Bar4.375"--133.050"53000.22Latrobe Specialty Metals Company4/3/2020ALLOY STEEL4330M

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