Sae 4340 Alloy Steel Bars / AISI 4340 Round Flat Bars / 4340 Rods / Rings

Product Description

AISI 4340 is a Nickel-Chromium-Molybdenum alloy steel known for its superior toughness and high strength in the heat-treated condition. It is a highly sought-after grade for applications where high fatigue strength and deep hardenability are required, as it maintains its mechanical properties even in large sections.

Key Specifications & Properties

Common Applications

Because of its extreme durability and strength, 4340 round bars and rings are used in:

• Aerospace: Landing gear components, structural airframe parts, and engine mounts.

• Oil & Gas: High-strength drill collars, tool joints, and heavy-duty shafting.

• Automotive: Heavy-duty crankshafts, axles, steering knuckles, and transmission gears.

• General Engineering: High-tensile bolts, forged rings, and power transmission components.

Features to Highlight in Your Listing

• Deep Hardenability: The nickel content ensures uniform strength and hardness through the entire thickness of the bar or ring.

• Exceptional Fatigue Resistance: Ideal for parts subjected to high-stress cycles and heavy impact.

• Excellent Ductility: Offers a rare combination of high strength and good ductility at low temperatures.

• Versatile Forms: Available as Round Bars, Flat Bars, and Seamless Rolled Rings.