Fry Steel Company
Order Online
Fry Steel Company

4340 N & T

4340 N&T (Normalized & Tempered) is an aircraft quality extremely high strength medium carbon low alloy steel that has been normalized and then tempered for stress relief. This alloy exhibits deep hardenability, high ductility, toughness and strength. The material has high fatigue resistance and creep resistance. After tempering, flame or induction hardening will produce material with Rc 50, while nitriding will produce Rc 60. 4340 is used in products such as piston pins, bearings, ordnance, gears, dies, and pressure vessels. (UNS G43400)

Common Applications

  • AerospaceAerospace
  • IndustrialIndustrial

Benefits

  • Extremely High Strength
  • Deep Hardenability
  • High Ductility
  • High Fatigue Resistance
  • High Creep Resistance
Buy Now

Request a Quote

4340 N & T

We Stock 4340 N & T to the Following Specifications:

  • AMS-2301
  • AMS-2304
  • AMS-2310
  • AMS-6409
  • AMS-6415
  • AMS-6484
  • AMS-S-5000
  • ASTM-A-322
  • ASTM-A-331
  • BMS-7-28 (CHECK T.R.)
  • DMS-1555 GRD B (CHECK T.R.)
  • MIL-S-5000

Chemical Makeup

ElementMinMax
Carbon, C0.380.43
Manganese, Mn0.650.85
Silicon, Si0.150.35
Phosphorus, P-0.015
Sulfur, S-0.008
Chromium, Cr0.70.9
Molybdenum, Mo0.20.3
Nickel, Ni1.652
Copper, Cu-0.35
Aluminum, Al0.020.05
Vanadium, V0.020.08
Columbium/Niobium, Nb0.020.05

Cross-Fittings

Round

There are 105 sizes and conditions.

  • 1/4 - CD
  • .260 - DG&P
  • 5/16 - CD
  • .3225 - DG&P
  • 3/8 - CD
  • .385 - DG&P
  • 7/16 - CD
  • .4475 - DG&P
  • 1/2 - CD
  • .510 - DG&P
  • 9/16 - CD
  • .5725 - DG&P
  • 5/8 - CD
  • .635 - DG&P
  • 11/16 - CD
  • 3/4 - CD
  • .760 - TG&P
  • 13/16 - CD
  • 7/8 - CD
  • .885 - TG&P
  • 15/16 - CD
  • 1 - CD
  • 1.010 - TG&P
  • 1-1/16 - CD
  • 1-1/8 - CD
  • 1.135 - TG&P
  • 1-3/16 - CD
  • 1-1/4 - CD
  • 1.260 - TG&P
  • 1-5/16 - CD
  • 1-3/8 - CD
  • 1-7/16 - CD
  • 1-1/2 - T-CD TL
  • 1-9/16 - T-CD TL
  • 1-5/8 - T-CD TL
  • 1-3/4 - T-CD TL
  • 1-7/8 - T-CD TL
  • 2 - T-CD TL
  • 2-1/8 - T-CD TL
  • 2-1/4 - T-CD TL
  • 2-3/8 - T-CD TL
  • 2-1/2 - T-CD TL
  • 2-5/8 - T-CD TL
  • 2-3/4 - T-CD TL
  • 3 - T-CD TL
  • 3-1/8 - T-CD TL
  • 3-1/4 - T-CD TL
  • 3-1/2 - T-CD TL
  • 3-3/4 - T-CD TL
  • 4 - T-CD TL
  • 4-1/4 - T-CD TL
  • 4-1/2 - T-CD TL
  • 1 - HR
  • 1-1/8 - T-HR TL
  • 1-1/4 - T-HR TL
  • 1-3/8 - 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
  • 2-1/8 - 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
  • 2-7/8 - T-HR TL
  • 3 - T-HR TL
  • 3-1/8 - T-HR TL
  • 3-1/4 - T-HR TL
  • 3-3/8 - T-HR TL
  • 3-1/2 - T-HR TL
  • 3-3/4 - T-HR TL
  • 3-7/8 - 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
  • 7-1/4 - T-HR TL
  • 7-1/2 - T-HR TL
  • 7-3/4 - T-HR TL
  • 8 - T-HR TL
  • 8-1/4 - T-HR TL
  • 8-1/2 - T-HR TL
  • 9 - T-HR TL
  • 9-1/2 - T-HR TL
  • 10 - T-HR TL
  • 10-1/2 - T-HR TL
  • 11 - T-HR TL
  • 12 - T-HR TL
  • 13 - T-HR TL
  • 14 - T-HR TL
  • 16 - T-HR TL
  • 18 - T-HR TL
  • 20 - T-HR TL

Flat

There are 76 sizes and conditions.

  • 1/4 X 1 - CD
  • 1/4 X 1-1/2 - CD
  • 1/4 X 2 - CD
  • 3/8 X 2 - CD
  • 3/8 X 3 - CD
  • 1/2 X 1 - CD
  • 1/2 X 1-1/2 - CD
  • 1/2 X 2 - CD
  • 1/2 X 2-1/2 - CD
  • 1/2 X 3 - CD
  • 1/2 X 4 - CD
  • 1/2 X 6 - CD
  • 5/8 X 1 - CD
  • 5/8 X 1-1/2 - CD
  • 5/8 X 2 - CD
  • 5/8 X 4 - CD
  • 3/4 X 1 - CD
  • 3/4 X 1-1/2 - CD
  • 3/4 X 2 - CD
  • 3/4 X 3 - CD
  • 3/4 X 4 - CD
  • 3/4 X 6 - CD
  • 1 X 1-1/4 - CD
  • 1 X 1-1/2 - CD
  • 1 X 2 - CD
  • 1 X 2-1/2 - CD
  • 1 X 3 - CD
  • 1 X 4 - CD
  • 1 X 5 - CD
  • 1 X 6 - CD
  • 1-1/4 X 1-1/2 - CD
  • 1-1/4 X 2 - CD
  • 1-1/4 X 2-1/2 - CD
  • 1-1/4 X 3 - CD
  • 1-1/4 X 4 - CD
  • 1-1/4 X 5 - CD
  • 1-1/4 X 6 - CD
  • 1-1/2 X 2 - CD
  • 1-1/2 X 2-1/2 - CD
  • 1-1/2 X 3 - CD
  • 1-1/2 X 4 - CD
  • 1-1/2 X 5 - CD
  • 1-1/2 X 6 - CD
  • 1-3/4 X 3 - CD
  • 1-3/4 X 4 - CD
  • 2 X 2-1/2 - CD
  • 2 X 3 - CD
  • 2 X 4 - CD
  • 2 X 5 - CD
  • 2 X 6 - CD
  • 2-1/2 X 3 - CD
  • 2-1/2 X 3-1/2 - CD
  • 2-1/2 X 4 - CD
  • 2-1/2 X 5 - CD
  • 2-1/2 X 6 - CD
  • 3 X 4 - CD
  • 3 X 5 - CD
  • 3 X 6 - CD
  • 1-3/4 X 3 - HR
  • 1-3/4 X 4 - HR
  • 2 X 2-1/2 - HR
  • 2 X 3 - HR
  • 2 X 3-1/2 - HR
  • 2 X 4 - HR
  • 2 X 6 - HR
  • 2-1/2 X 3 - HR
  • 2-1/2 X 3-1/2 - HR
  • 2-1/2 X 4 - HR
  • 2-1/2 X 5 - HR
  • 2-1/2 X 6 - HR
  • 3 X 4 - HR
  • 3 X 5 - HR
  • 3 X 6 - HR
  • 3-1/2 X 6 - HR
  • 4 X 5 - HR
  • 4 X 6 - HR

Square

There are 19 sizes and conditions.

  • 1/4 - CD
  • 3/8 - CD
  • 1/2 - CD
  • 5/8 - CD
  • 3/4 - CD
  • 1 - CD
  • 1-1/4 - CD
  • 1-1/2 - CD
  • 2 - CD
  • 2-1/2 - CD
  • 2 - HR-RCS
  • 2-1/4 - HR-RCS
  • 2-1/2 - HR-RCS
  • 2-3/4 - HR-RCS
  • 3 - HR-RCS
  • 3-1/2 - HR-RCS
  • 4 - HR-RCS
  • 5 - HR-RCS
  • 6 - HR-RCS

Hex

There are 11 sizes and conditions.

  • 1/4 - CD E
  • 3/8 - CD E
  • 1/2 - CD E
  • 5/8 - CD E
  • 3/4 - CD E
  • 1 - CD E
  • 1-1/16 - CD E
  • 1-1/4 - CD E
  • 1-1/2 - CD E
  • 1-3/4 - CD E
  • 2 - CD E
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