4140 Cold Finished Annealed Steel

4140 Cold Finished Annealed Steel, Composition, Properties, & Applications.

The process of annealing cold finished steel helps to relieve the internal strength that was created during the cold rolling process. 4140 cold finished annealed is a popular type of alloy steel containing chromium and molybdenum. This type of steel can be oil hardened for high hardness and offers extreme strength for varying industrial applications. 

4140 cold finished annealed has self-scaling properties, is relatively easy to machine, and has good ductility. Although it requires more pressure and force to form than plain steel, it can be shaped using conventional techniques. Available in bars, rounds, flats, squares, and hexagons, 4140 cold finished annealed can be adapted to your unique applications. Bergsen carries 4140 in rounds available for immediate shipment.

The typical composition and mechanical properties of 4140 cold finished annealed are as follows:

  • Chromium. 0.80%-1.10%
  • Manganese. 0.75%-1.00%
  • Carbon. 0.38%-0.43%
  • Molybdenum. 0.15%-0.25%
  • Sulfur. 0.04% (Max)
  • Phosphorous. 0.35% (Max)
  • Lead. 0.15%-0.35%
  • Tensile Strength. 105,000 PSI
  • Yield Strength. 85,000 PSI
  • Elongation. 15% (in 2″) 

4140 Cold Finished Annealed Properties

4140 cold finished annealed has a variety of beneficial properties. During the annealing process, protective gases are added to the base unit to help prevent oxidation of the steel, granting it good corrosion resistance.

Some other most notable properties of 4140 cold finished annealed include high fatigue strength, abrasion and impact resistance, toughness, and torsional strength, making it a dependable choice for demanding applications. 

Applications of 4140 Cold Finished Annealed

4140 steel is used across many industrial fields that require strength and versatility. The aerospace, oil and gas, automotive, agriculture, and defense industries often use 4140 cold finished annealed for varying applications.

The easily machined material allows for the creation of a wide range of shapes, from simple to complex. It is best to talk with your metal supplier to determine if 4140 annealed will work best for your needs.

Some common applications for 4140 steel include:

  • Fixtures
  • Shafts
  • Crankshafts
  • Gears
  • Jigs
  • Nuts and Bolts
  • Collars
  • Milling Spindles
  • Steel Conveyor and Roll
  • Steel Coupling
  • Ejector
  • Piston Rods
  • Machinery Parts
  • And So Much More!

Why Choose Bergsen Metals? 

4140 cold finished annealed steel offers many beneficial properties, making it ideal for a wide range of industries and applications. At Bergsen Metals, our network of mills, processors, and material suppliers allows us to supply high-quality steels best suited for your needs.

We are proud to supply a diverse variety of industries, and we will work with you to find the right material for your job requirements. For more information, or to learn more about 4140 cold finished annealed, contact us or request a quote today.

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