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4340 Round Bar | Forte Precision Metals

4340 round bar

Looking for a superior metal alloy for heavy-duty applications? Choose 4340 round bar.

High Quality 4340 ROUND Bar

Introduction to 4340 round bar: A high-strength steel alloy

4340 round bar is a type of high-strength steel alloy known for its excellent mechanical properties. It is a heat treatable, low alloy steel that contains nickel, chromium, and molybdenum.

Due to its high tensile strength, toughness, and wear resistance, it is a popular material for a wide range of industrial applications, including aerospace, automotive, and oil and gas industries. 4340 steel is often useful for critical parts and components that require exceptional strength and durability, such as crankshafts, gears, and axles. 

The alloy is also known for its excellent fatigue resistance, making it ideal for heavy-duty applications subjected to cyclic loading. Its combination of strength and toughness makes 4340 steel an excellent choice for parts and components that are subjected to both high stress and impact.

4340 Steel Commonly Used for;

  • aircraft parts
  • automotive parts and systems
  • gun parts
  • forged hydraulic
  • forged steel crankshafts

4340 Steel Properties

Physical Properties 


Melting Range 

Specific Heat Capacity 

Electrical Resistivity


7.85 g/cm^3


448 J/kg*K

1.09 µΩ.m

4340 Steel Chemical Elements











1.65 – 2.0

0.7 – 0.9

0.6 – 0.8

0.38 – 0.43

0.2 – 0.3

0.15 – 0.3




4340 Round Bar Advantages

This 4340 alloy steel bar type is a common valuable material in many industries. It is a type of low-carbon, medium alloy steel with good elasticity. The steel has a round cross-section, making it ideal for pipe or tubing. It is also useful when welding and brazing.

4340 alloy steel is a type of steel helpful in various industries. It has good toughness and strength, making it suitable for many applications. It is commonly useful in the auto, aerospace, and construction industries. Also, it is useful as a building material for bridges and other structures.

Here are the advantages of 4340 alloy steel;

Lots of applications: The 4340 steel is a type of steel widely used in the automotive, construction, and machine industries. It is used in automotive suspension systems and machine parts applications.

Suitable structural Components: A 4340 alloy steel is made from low-alloy, high-strength steel. It has good machinability and weldability properties. These bars are often used to manufacture machine tools, aircraft parts, and structural components.

Excellent Workability: It is a kind of alloy steel bar. It is made of high-strength low-alloy steel and chromium. It has a great yield strength that depends on the heat treatment and can be hardened quickly.

4340 Round Bar Applications  

The use of 4340 steel has been increasing due to its high performance-to-cost ratio. The most popular use for4340 alloy steel is for making wheels, shafts, and other automotive parts.

This is a popular material for construction and engineering. It has high strength, ductility, and toughness. It is commonly useful in construction as a structural component. Also, it can be found in bridges, buildings, and industrial machinery.

Forte Precision Metals is here for you if you need an efficient steel round bar supplier and a centerless ground bar supplier who provides you with quality 4340 alloy steel stocks! We work firmly with our clients to ensure that their precision ground bars are delivered to the correct specifications.

Get your 4340 Alloys bar stocks and 4340 Alloys round bar stocks now! Call us or request a quote!

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Contact info

Forte Precision Metals provide Precision Ground Bars & Centerless Ground services nationally and worldwide
Forte Percision Metals, Inc.
9234 Parklane Ave. Franklin Park, IL 60131
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