Fry Steel Company
Order Online
Fry Steel Company

4140 NORM

4140 normalized is an aircraft quality low-alloy steel containing chromium, molybdenum, and manganese. The chromium content provides good hardness penetration, and the molybdenum imparts uniform hardness and high strength. This version of 4140 is hot rolled and normalized at 1650 F ( 25 F) and required to meet stringent magnetic inspection criteria. This alloy is characterized by its high fatigue strength, torsional strength, abrasion resistance, and toughness. This material is used to produce piston rods, shafts, crank shafts, gears and other machinery parts. (UNS G41400)

Common Applications

  • AerospaceAerospace
  • DefenseDefense
  • IndustrialIndustrial

Benefits

  • Superior Toughness
  • Good Ductility
  • Good Wear Resistance
Buy Now

Request a Quote

4140 NORM

We Stock 4140 NORM to the Following Specifications:

  • AMS-2301
  • AMS-2304
  • AMS-6349
  • AMS-6382 EXC. COND.
  • AMS-6529
  • AMS-S-5626
  • ASTM-A-322
  • MIL-S-5626

Chemical Makeup

ElementMinMax
Carbon, C0.380.43
Manganese, Mn0.751
Silicon, Si0.150.35
Phosphorus, P-0.025
Sulfur, S-0.025
Chromium, Cr0.81.1
Molybdenum, Mo0.150.25
Nickel, Ni-0.25
Copper, Cu-0.25
Aluminum, Al0.020.05
Vanadium, V0.020.08
Columbium/Niobium, Nb0.020.05

Cross-Fittings

Round

There are 40 sizes and conditions.

  • 1 - T-HR TL
  • 1-1/8 - T-HR TL
  • 1-1/4 - T-HR TL
  • 1-1/2 - T-HR TL
  • 1-5/8 - T-HR TL
  • 1-3/4 - T-HR TL
  • 1-7/8 - T-HR TL
  • 2 - T-HR TL
  • 2-1/4 - T-HR TL
  • 2-3/8 - T-HR TL
  • 2-1/2 - T-HR TL
  • 2-5/8 - T-HR TL
  • 2-3/4 - T-HR TL
  • 3 - T-HR TL
  • 3-1/8 - T-HR TL
  • 3-1/4 - T-HR TL
  • 3-1/2 - T-HR TL
  • 3-5/8 - T-HR TL
  • 3-3/4 - T-HR TL
  • 4 - T-HR TL
  • 4-1/4 - T-HR TL
  • 4-1/2 - T-HR TL
  • 4-3/4 - T-HR TL
  • 5 - T-HR TL
  • 5-1/4 - T-HR TL
  • 5-1/2 - T-HR TL
  • 5-3/4 - T-HR TL
  • 6 - T-HR TL
  • 6-1/4 - T-HR TL
  • 6-1/2 - T-HR TL
  • 6-3/4 - T-HR TL
  • 7 - T-HR TL
  • 7-1/2 - T-HR TL
  • 8 - T-HR TL
  • 8-1/2 - T-HR TL
  • 9 - T-HR TL
  • 9-1/2 - T-HR TL
  • 10 - T-HR TL
  • 11 - T-HR TL
  • 12 - T-HR TL

Flat

There are 11 sizes and conditions.

  • 1-3/4 X 3 - HR
  • 2 X 2-1/2 - HR
  • 2 X 3 - HR
  • 2 X 4 - HR
  • 2-1/2 X 3 - HR
  • 2-1/2 X 4 - HR
  • 2-1/2 X 6 - HR
  • 3 X 4 - HR
  • 3 X 6 - HR
  • 3-1/2 X 4 - HR
  • 4 X 6 - HR

Square

There are 7 sizes and conditions.

  • 2-1/4 - HR-RCS
  • 2-1/2 - HR-RCS
  • 3 - HR-RCS
  • 3-1/2 - HR-RCS
  • 4 - HR-RCS
  • 5 - HR-RCS
  • 6 - HR-RCS

Hex

There are no sizes and conditions for the hex cross-section.

Fry Steel Company
Linkedin

Client Resources

Company

Resources

Certifications

Copyright 2025 Fry Steel Company. All Rights Reserved.
Reliance

A Reliance, Inc. Company

Fry Steel Company
Order Online