4340 (UNS G43400)

About 4340 (UNS G43400)

4340 (UNS G43400) alloy steel is supplied where higher strength, hardenability, wear resistance or elevated temperature performance is needed.

It is commonly selected for shafts, gears, tooling, pressure parts and heavy-duty machined components. Anita Metal & Alloys supplies 4340 (UNS G43400) in standard as well as non-standard sizes for domestic and export customers.

To learn more about 4340 (UNS G43400), message us on WhatsApp and we'll get right back to you.

• 4340 (UNS G43400)
• Alloy Steel
• Cut size supply
• MTC available

Characteristics of 4340 (UNS G43400)

4340 (UNS G43400) is chosen for dependable Alloy Steel performance in engineered components and project supply.

• Reliable performance for engineering and process industry use
• Suitable for stocked and made-to-order supply programs
• Available in common commercial sizes and finishes
• Can be matched with equivalent international specifications
• Supplied with traceability and documentation on request

Chemical Composition / Grade Profile

Final chemistry is supplied as per the ordered standard and confirmed on the material test certificate.

Key Properties

• Higher strength potential than plain carbon steel
• Good hardenability in suitable grades
• Can be normalized, quenched, tempered or annealed
• Useful for wear, fatigue and pressure applications
• Supply condition selected as per final machining route

Mechanical Properties

Machinability & Fabrication

Machining, forming, welding and heat treatment practice for 4340 (UNS G43400) should be selected according to product form, supply condition and the applicable specification.

• Machining parameters should be selected for the final heat condition
• Welding or forming practice should follow the applicable grade standard
• Use sharp tooling and suitable coolant for close-tolerance parts

Applications of 4340 (UNS G43400)

• Gears, shafts, axles and couplings
• Tooling and die components
• Boiler, refinery and power plant parts
• Forged rings, blocks and fasteners
• Heavy engineering and maintenance spares

Available Forms of 4340 (UNS G43400)

We can supply 4340 (UNS G43400) in mill length, cut length, ready-to-machine sizes and project-specific packing. Availability depends on grade, size, finish and order quantity.

• Round, square, flat and hex bars
• Sheets, plates, coils and strips
• Seamless and welded pipes / tubes
• Pipe fittings, flanges and fasteners
• Forged rings, blocks and custom cut pieces

Need 4340 (UNS G43400) in a specific form or size? Message us on WhatsApp and we'll confirm availability.