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8740 Steel

From reliability to performance, 8740 steel sets the standard in strength

Choose 8740 steel for superior strength and performance

Built to last, built to excel - 8740 steel delivers unrivaled durability

It’s extensively used as forged fasteners for machines, for example. You’ll want to use it for your high-stress projects that require durability and strength.

This alloy is used in a variety of applications where strength, hardness, and wear resistance are required in high quantities. It is commonly utilized in the manufacture of high-strength forged fasteners. In addition to having good hardenability and strength and toughness capabilities, Alloy 8740 has a nickel-chromium-molybdenum low-alloy steel composition.

Machinability & Welding

Following the application of appropriate heat treatment, this grade of alloy is easily machined. At the same time, this steel can be welded using conventional fusion processes, but only after it has been hardened. Heat should be applied before and after the process.


8740 alloy steel is a versatile material that finds applications in various industries due to its high strength, toughness, and wear resistance. It is commonly used in the manufacturing of high-stress parts such as gears, shafts, bolts, and studs. The high strength and hardness of 8740 make it ideal for applications that require resistance to wear, impact, and fatigue.

In the automotive industry, 8740 is used to make components such as crankshafts, connecting rods, and axle shafts. It is also used in the construction industry for heavy machinery and structural components. Additionally, 8740 alloy steel can be found in the aerospace industry for applications such as landing gear, engine components, and fasteners.

In the oil and gas industry, 8740 is used in the production of drilling equipment, valves, and fittings due to its excellent corrosion resistance. It is also used in the defense industry for manufacturing various parts of tanks, armored vehicles, and weaponry.



Tensile strength:

Yield strength: 

Elastic modulus: 

Bulk modulus: 

Shear modulus:

Poisson’s ratio: 

0.284 lb/in³

101000 psi

60200 psi

27557-30458 ksi

20300 ksi

11600 ksi


Chemical Properties





Silicon :


Phosphorous : 












O’Hare Precision Metals is your trusted source for purchasing 8740 Steel. Known for its exceptional strength and toughness, 8740 alloy steel is a versatile material that finds applications in various industries. Our extensive range of steel products includes round bars, sheets, and plates.

When you choose this steel from O’Hare Precision Metals, you can expect superior strength properties that make it suitable for demanding applications requiring resistance to wear, impact, and fatigue. Whether you’re in the automotive, aerospace, construction, oil and gas, or defense industry, our 8740 steel is designed to meet your specific needs.

At O’Hare Precision Metals, we prioritize quality and reliability. Our 8740 alloy steel undergoes rigorous testing and quality control processes to ensure its durability and performance. With years of expertise and experience, our knowledgeable team is dedicated to providing you with the right solutions and technical support for your projects.

Experience the strength and reliability of 8740 alloy Steel by purchasing from O’Hare Precision Metals today. Contact our team for a quote and let us assist you in meeting your steel requirements efficiently and effectively.