AISI 4340
AISI 4340 is a high-strength, low-alloy steel widely used in forged components due to its excellent toughness, fatigue resistance, and high tensile strength. It is part of the nickel-chromium-molybdenum family and is commonly heat-treated to achieve optimal mechanical properties.
Descriptions
1. Chemical Composition
The chemical composition of AISI 4340 steel is critical to its performance. Key alloying elements include nickel, chromium, and molybdenum, which enhance hardenability and strength.
2. Mechanical Properties
AISI 4340 exhibits exceptional mechanical properties after heat treatment (e.g., quenching and tempering). Properties vary based on processing conditions.
3. Key Advantages
Superior fatigue and fracture resistance.
Excellent response to heat treatment (deep hardening).
Retains strength at elevated temperatures (up to ~400°C).
Weldable with pre-/post-heat treatment.
4. Industry-specific standards
ASTM A434: Standard specification for steel bars, alloy, hot-wrought.
AMS 6414/AMS 6415: Aerospace material specifications for Q&T steel.
DIN 1.6565: European designation for equivalent alloy.
UNS G43400: Unified numbering system code.
Recent products
Dual-flange Spacer Spool Forging
China 4145H Stabilizer forgings Reamer forgings
API 6A Valve Body Forging
Aluminum Casing Forging
API7-1 4145H Stabilizer Sleeve Forging
CONTACT US
Address
B-2007,Chuanmei Building,Taishan Street,Taian City，Shandong, China
Call Us
+86 0538 6368027
Email Address
Sales@tiptopforging.com
Applications
Landing gear, engine mounts, helicopter rotor components.
Drill collars, valve bodies, high-pressure fittings.
Drill collars, valve bodies, and pump shafts.
Heavy-duty gears, spindles, couplings.
