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AISI 4340 (E4340) per AMS 6415 - Bars

Aircraft Quality 4340 per 6415 Cold Finished Round Bar

Chromoly steel 4340 (E4340) has outstanding harden-ability and high-strength characteristics.  Ideal for highly stressed parts operating under severe conditions, aircraft quality AISI 4340 steel alloy material is excellent for shafts and valves that are subject to extreme conditions.  The term Aircraft Quality (or AQ steel) which all of our steel carries means it is suitable for the production of aircraft parts which are subject to magnetic particle inspection after machining.

If you don't see your size below, call your salesperson as our inventory is constantly changing and new items may not be listed below. Or request a quote online now using our convenient form.

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AMS 6415 - AISI 4340 (E4340) Round Bar Cold Finished Specification Table

Diameter (Inches) Length (Feet)
1/2 10' / 12' R/L
3/4 10' / 12' R/L
7/8 10' / 12' R/L
1 10' / 12' R/L
1 1/4 10' / 12' R/L
1 1/2 10' / 12' R/L
1 3/4 10' / 12' R/L
2 10' / 12' R/L
2 1/4 10' / 12' R/L
2 1/2 10' / 12' R/L
3 10' / 12' R/L
  • Material may also meet specs ASTM-A331, 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. 

CUTTING 4130 METAL AND 4340 MATERIALS FOR PRODUCTION
REQUIRES HEAVY DUTY BAR SAWS.

 
Our automated equipment regularly processes 4340 chromoly steel and can handle most customer owned materials as well. Lead times are typically 2 days or less. Call your representative at 908-497-1477 for current lead times.

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