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AISI 4340 (E4340) per AMS 6415 - Bars (HR)

Aircraft Quality 4340 per 6415 Hot Rolled (H.R.) Round Bar

Our AMS 6415 Round Bar Hot Rolled Aircraft Quality material meets AISI 4340 steel grade specifications in accordance with ASTM International Standards. This grade of chromoly bar has outstanding harden-ability as one of the richer alloy grades. High strength characteristics are attainable throughout the section, making it an ideal grade for crankshafts, landing gear, valves, and axle shaft parts which are exposed to high stress under severe conditions. Supporting one of the largest inventories for 4340 steel bar round stock, you can count on Benedict-Miller as your 4340 steel bar supplier.

If you don't see your size for 4340 HR Rounds below, call your salesperson as our inventory is constantly changing and adapting and new items may not be listed below.

Call 1-908-497-1477 to speak with a knowledgeable, friendly AQ steel specialist who will provide you with a quick quote and immediate answers to your questions. Or place a request for quote online now using our convenient form.

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AMS 6415 - AISI 4340 (E4340) Round Bar Hot Rolled Size Table

Diameter
(Inches)
Length
(Feet)
1 1/2 18' / 24' R/L
1 3/4 18' / 24' R/L
2 18' / 24' R/L
2 1/4 18' / 24' R/L
2 1/2 18' / 24' R/L
3 18' / 24' R/L
3 1/4 18' / 24' R/L
4 18' / 24' R/L
4 1/4 18' / 24' R/L
4 1/3 18' / 24' R/L
4 3/4 18' / 24' R/L
5 18' / 24' R/L
5 1/4 18' / 24' R/L
6 18' / 24' R/L
6 1/2 18' / 24' R/L
7 18' / 24' R/L
7 1/2 18' / 24' R/L
8 18' / 24' R/L
9 18' / 24' R/L
9 1/2 18' / 24' R/L
  • Material may also meet specs ASTM-A322, ASTM-A304, ASTM-A108, AMS-2301, AMS-S-5000 (replaced MIL-S-5000), EN10204
  • For detailed information and chemical analysis please visit the 4340 (E4340) steel page.
  • For our AISI 4130 (E4130) aircraft quality steel products please visit the 4130 (E4130) steel section. 

Supplying the world AISI 4130 (E4130) and 4340 (E4340) Aircraft Quality Steel.
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1-908-497-1477