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41L40 Steel

41L40 steel is a type of alloy steel that is known for its high hardenability, making it a popular choice for industrial applications that require strength, wear resistance, and durability.

Introduction to 41L40 Steel

41L40 round bar is an alloy steel bar comprising a combination of carbon, manganese, chromium, and molybdenum. It is known for its high hardenability, which means it can be hardened by heat treatment to achieve high strength and wear resistance. This makes the 41L40 round bar an ideal material for various industrial applications, including manufacturing, machining, and tooling.

Regarding its composition, the 41L40 round bar typically contains around 0.40% carbon, 0.75% manganese, 0.80% – 1.10% chromium, and 0.15% – 0.25% molybdenum. This combination of elements provides the round bar with excellent hardness penetration, uniformity of hardness, and high strength.

One of the benefits of using a 41L40 round bar is that it is relatively easy to machine in heat-treated conditions. It also has good resistance to creep in temperatures up to 1000°F, making it suitable for high-temperature applications. Additionally, the 41L40 round bar has self-scaling characteristics, making it ideal for forging.

Steel Purchaser

Best 41l40 Steel Round Bar Supplier

Would you buy a high-quality 41L40 round bar or 41L42 steel for your industrial applications? Finding a trusted supplier that can provide you with reliable and durable materials is essential. Advance Grinding Services is a reputable supplier of alloy steel round bars. We offer 41L40 and 41L42 that can meet your specific requirements and provide you with the best possible value for your investment.

When you purchase 41L40 or 41L42 steel from Advance Grinding Services, you can expect the following benefits:

  • High-Quality Materials: Advance Grinding Services sources its materials from top-tier mills and manufacturers to ensure that the round steel bars you receive are of the highest quality and meet industry standards.

  • Custom Sizes and Shapes: Advance Grinding Services offers custom cutting and shaping services to provide round steel bars tailored to your needs and requirements.

  • Quick Turnaround Time: Advance Grinding Services offers fast turnaround times for standard and custom orders so you can receive your materials as quickly as possible.

  • Competitive Pricing: Advance Grinding Services offers its round steel bars competitive pricing, ensuring you get the best possible value for your investment.

  • Expert Technical Support: Advance Grinding Services has a team of experienced and knowledgeable technical experts who can assist you with any questions or concerns about your materials or their applications.

Whether you need 41L40 or 41L42 steel round bars for manufacturing, automotive, or aerospace applications, Advance Grinding Services can provide high-quality materials that meet your specific requirements. Contact them today to learn more about their products and services and to place your order. Contact us today so that you can get a quote on the alloy that you need.

AGS 41l42


As such, it is now understandable why this type of alloy steel is sought after getting a quick review of its components.

Consequently, its high machinability is highlighted as it is commonly combined with sulfur to further improve its machinability and make carburizing processes more effective.

With its excellent machinability, this even elevated this alloy steel’s prominence among industries.

Fortunately, Advance Grinding Services never runs out of 4140 alloy steel bars and can very much supply your needs especially if you are operating in the Illinois area!


Tensile Strength95000 psi
Yield Strength60200 psi
Hardness (Brinell)197
Hardness (Knoop)219
Hardness (Rockwell)92
Hardness (Vickers)207


41L42 steel is a specific grade of alloy commonly used in various industrial applications. It is a low-carbon, chromium-molybdenum alloy steel with high strength, toughness, and wear resistance.

The chemical composition of 41L42 steel is as follows:

  • Carbon (C): 0.40%
  • Chromium (Cr): 0.90-1.20%
  • Molybdenum (Mo): 0.15-0.25%
  • Manganese (Mn): 0.75-1.00%

The combination of chromium and molybdenum in 41L42 steel provides good hardness penetration and uniformity of hardness, which makes it suitable for use in applications that require high strength and toughness. It is also relatively easy to machine, especially in heat-treated conditions.

Some of the applications of this steel include:

  1. Manufacturing of Gears and Shafts: The high strength and hardness make it ideal for manufacturing gears, shafts, and other components that require high durability and resistance to wear.

  2. Manufacturing of Machine Parts: 41L42 steel is widely used in manufacturing machine parts, such as screws, bolts, and nuts, due to its high strength and toughness.

  3. Automotive and Aerospace Industry: The high strength and durability of this steel make it suitable for use in the manufacturing of various automotive and aerospace components, such as crankshafts, axles, and landing gears.

  4. Oil and Gas Industry: The wear resistance and toughness of 41L42 steel make it ideal for use in the oil and gas industry, where it is used to manufacture drill collars, subs, and other critical components.

In summary, it is a versatile alloy that finds applications in various industries due to its high strength, toughness, and wear resistance. Its unique properties make it suitable for critical applications with paramount performance and reliability.


41L40 steel is a versatile material that has numerous applications across different industries. Due to its excellent strength, toughness, and wear resistance, it is commonly used to manufacture various industrial components and machinery parts. Here are some of its applications:

  1. Automotive and Transportation Industry: 41L40 steel is used to manufacture gears, crankshafts, axles, and other components in cars, trucks, and other vehicles. Its high strength and hardness make it ideal for heavy-duty applications.

  2. Oil and Gas Industry: 41l40 round bar is used to manufacture components such as drill collars, subs, and shafts in the oil and gas industry. Its excellent wear resistance and toughness make it ideal for harsh drilling environments.

  3. Aerospace Industry: 41L40 steel is used to manufacture aircraft landing gears, engine parts, and other critical components. Its high strength and fatigue resistance make it suitable for high-stress applications.

  4. Construction Industry: 41L40 steel is used to manufacture construction equipment, such as cranes and excavators. Its strength and toughness make it ideal for handling heavy loads and harsh working conditions.

  5. Tool and Die Industry: 41l40 round bar is used to manufacture cutting tools, molds, and dies. Its hardness and wear resistance makes it suitable for machining and forming operations.

Whatever industry you are from, rest assured that Advance Grinding Services can provide you with a 41L40 round bar for all your specific industry applications.

Give us a call or request a quote from our website and acquire a high-quality 41L40 alloy steel round bar stock today!