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O6 Tool Steel

Get the edge you need with O6 tool steel bar’s superior toughness and wear resistance

Introduction to O6 Tool Steel

O6 tool steel is a high-carbon, oil-hardening tool steel that is known for its excellent toughness, wear resistance, and dimensional stability. It is often used in applications that require high-impact resistance and wear resistance, such as cutting tools, dies, and punches.
Not only that, it contains chromium, molybdenum, and tungsten, which contribute to its high hardness and resistance to deformation. It also has a low distortion rate during heat treatment, making it easier to maintain tight tolerances.

The tool steel is typically supplied in the annealed or normalized condition and is heat treated to achieve its desired properties. Heat treatment can improve the steel’s hardness, toughness, and wear resistance, depending on the specific requirements of the application.

Overall, this tool steel is a versatile and reliable tool steel that can deliver exceptional performance in a wide range of applications. Its unique properties make it a popular choice for industries such as aerospace, automotive, and manufacturing.

Steel Purchaser

Chemical Composition and Mechanical Properties of O6 Tool Steel

O6 round stock is a high-performance alloy that contains a unique combination of carbon, chromium, tungsten, and molybdenum. The high carbon content in this material is responsible for its exceptional wear resistance and toughness. 

Additionally, the presence of chromium, tungsten, and molybdenum contributes to its high hardness and resistance to deformation. These properties make this tool steel grade an ideal material for demanding applications where high wear resistance and toughness are required.

However, the mechanical properties of O6 grade can vary depending on the specific heat treatment and processing conditions. Heat treatment is a critical step in maximizing its mechanical properties.

Through processes such as quenching and tempering, O6 grade can achieve higher hardness and strength, making it even more suitable for high-impact and high-wear applications. Thus, it is crucial to select the appropriate heat treatment process to ensure that the O6 tool steel performs optimally in the intended application.


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!


Density 7.7-8.0
Tensile Strength 95000 psi
Yield Strength 60200 psi
Hardness (Brinell) 197
Hardness (Knoop) 219
Hardness (Rockwell) 92
Hardness (Vickers) 207
Machinability 65

How to find o6 tool steel suppliers

Finding O6 tool steel suppliers can be done through several methods. Here are some steps you can take to locate a reliable supplier:
  1. Research online: Conduct a search on the internet for O6 tool steel suppliers. Many steel suppliers have an online presence where you can browse their products, specifications, and prices. You can also find customer reviews and ratings to help you evaluate their reputation.

  2. Check industry directories: Industry directories such as ThomasNet, Alibaba, and GlobalSpec can help you locate O6 tool steel suppliers. These directories often provide a list of suppliers and their contact information, making it easier to reach out to them directly.

  3. Attend trade shows: Attend trade shows and conferences related to the steel industry. This is an excellent opportunity to meet with O6 tool steel suppliers and discuss their products and services. You can also compare prices and quality across different suppliers.

  4. Consult with industry experts: Reach out to industry experts such as engineers, machinists, or metallurgists. They may have firsthand experience with tool steel and can recommend reputable suppliers. You can also consult with industry associations and organizations for their recommendations.

  5. Contact manufacturers: If you’re looking for large quantities of this  tool steel, you may want to consider contacting the manufacturers directly. They can provide you with information on pricing, availability, and delivery times.

When selecting a supplier, it’s important to consider factors such as quality, pricing, delivery times, and customer service. Make sure to evaluate different suppliers carefully to find the best fit for your needs.

Advance Grinding Services the Trusted o6 Tool Steel Suppliers

Advance Grinding Services is one of the reliable o6 tool steel suppliers with years of experience in the industry. The company is known for its commitment to quality, reliability, and excellent customer service.

In addition to its this grade tool steel offerings, Advance Grinding Services provides a range of machining services, including surface grinding, centerless grinding, and cylindrical grinding. Its skilled machinists can work with a variety of materials, including steel, aluminum, brass, and plastics.

Customers of Advance Grinding Services can expect prompt delivery times and competitive pricing. The company has a dedicated team of customer service representatives who can assist with any questions or concerns.

Give us a call or simply request a quote from our website and acquire quality stocks from the one of the best o6 tool steel suppliers!