4140 Alloy Round Bar

4140 steel round bar, often referred to as “Chromoly”, is an alloy steel bar made with a specific chemical composition including chromium and molybdenum. The unique chemical composition and hot rolling process ensure high-strength, toughness, and hardenability of the material, which provides versatility in various applications. Industries requiring more durability and resistance to wear, such as gears, shafts, and axles, would greatly benefit from the 4140 steel bar. In addition, 4140 round bar responds well to heat-treatment and is relatively easy to machine in the annealed condition.

Tell Steel supplies high-quality 4140 steel round bars from our hot-rolled bar products in a wide range of diameters. They can be supplied in both the annealed and quenched & tempered condition. Contact us for more information about our 4140 round bar or request a quote for more detailed information.

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4140 Steel Round Bar Properties

The addition of chromium and molybdenum to the chemical composition of 4140 steel round bar, as well as the hot rolling process, as well as the hot rolling process, provides the alloy bar with many desirable properties. The high-strength and hardenability result in top tensile strength and hardness, whereas the ability to machine and heat treat gives the 4140 round bar good yield strength. Based on the condition of the bar, the mechanical properties of the 4140 steel bar include:

Tensile Strength: 655-1170 MPa (95-170 ksi)
Yield Strength: 415-950 MPa (60-138 ksi)
Brinell Hardness: 197-241 HBW
Elongation: 25.7%
Thermal Conductivity: 42.6 W/mK

Characteristics of 4140 Steel Bar

The 4140 steel round bar exhibits many characteristics depending on the preparation and treatment options. The chemical makeup of 4140 round bar provides high-strength and toughness, resulting in the ability to withstand heavy loads and stresses. The weldability and machinability can both be done in careful conditions, which enables the 4140 steel bar to be versatile in many industrial applications. The characteristics of 4140 steel round bar include:

High Strength and Toughness
Wear Resistance
Good Ductility
Careful Weldability and Machinability
Corrosion and Oxidation Resistance

Sizes of 4140 Steel Round Bar Available

To best fit your needs, Tell Steel offers various sizes in both the annealed and quenched & tempered conditions for 4140 steel round bar. Similar to our carbon steel and other products, our 4140 steel bar can be modified with our available services to exact specifications to suit any industrial application.

4140 Round Bar Applications

The high strength, versatility, and fantastic resistance make 4140 steel round bar an ideal choice for many industries and applications. The ability to withstand high loads and resistance provides additions to components and machinery in the oil and gas, aerospace, and automotive industries. Several common applications of 4140 steel bar include:

Shafts and Axles
Gears and Couplings
Crankshafts
Tools and Fixtures
Bolts and Fasteners
Hydraulic Machinery

Tell Steel is Your 4140 Steel Round Bar Supplier

Since 1959, Tell Steel has provided customers with innovative metal solutions for various industrial applications. With over 17 million pounds of steel in our Long Beach warehouse, we are dedicated to providing our clients with any steel needed to fit their application. Our metal products are formed from high-quality materials and undergo rigorous processes to exceed expectations of delivering a top product. At Tell Steel, we strive for customer service and go above and beyond to deliver the best products to build trust. We are sure to provide quality 4140 steel bar for any of your needs!

Contact Tell Steel for Your 4140 Steel Round Bar Needs

If you have any application requiring a high-strength alloy bar capable of withstanding tough industrial applications, reach out to our knowledgeable staff to ensure the best fit! Contact us for more information about our 4140 steel round bar or request a quote for more pricing options.