4340 VAR is a premium melt aircraft quality steel with excellent ductility, toughness and high strength levels. It is considered a low alloy Chromium-Nickel-Molybdenum steel that has strong impact resistance as well as wear and abrasion resistance in the hardened condition. 

Stock sizes: 1.000” to 10.000” diameter

Common Specifications:

• AMS 6414, AMS 6415
• Pratt & Whitney PWA-S-6414, PWA-S-6415
• Pratt & Whitney LCS F-17
• General Electric S-400 / S-SPEC-35
• McDonnell Douglas DMS 1555 Grade A
• Boeing BMS 7-28
• Bell BHT 299-947-055
• Sikorsky SS9702

Industry Trade Names:

• 4340 VAR
• SAE 4340
• AISI 4340
• 4340 CEVM
• Lescalloy 4340

Common Applications:

• Jet engines
• Gearboxes
• Landing gear