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S7 Tool Steel

Built to Withstand the Toughest Conditions - S7 Tool Steel for Unbeatable Performance

Enhance Your Tool and Die Projects with S7 Tool Steel's Superior Performance

Boost Efficiency with S7 Tool Steel - The Perfect Balance of Toughness and Machinability

S7 tool steel is a versatile and highly durable material known for its excellent shock resistance and high impact strength. It belongs to the category of air-hardening, non-deforming tool steels. With its unique composition and heat treatment properties, it offers exceptional toughness, making it a popular choice for various applications in the tool and die industry.

Uses and Applications of S7 Tool Steel

S7 tool steel finds extensive use in a wide range of applications, particularly where high impact resistance and resistance to shock loads are required. Some of its common uses include:

  1. Punches and Dies: It is widely used in the production of punches and dies due to its ability to withstand high impact forces. It is often preferred for applications such as blanking, forming, and trimming dies.

  2. Cold Work Tools: S7 steel is suitable for manufacturing cold work tools, including cutting tools, shear blades, and thread rolling dies. Its excellent toughness and wear resistance make it well-suited for demanding applications.

  3. Plastic Molds: This steel is also utilized in the production of plastic molds, particularly for injection molding. Its high impact strength and resistance to thermal fatigue make it an ideal choice for molding applications.

  4. Forming Tools: S7 steel is commonly employed in the production of forming tools such as bending dies, stretch form dies, and extrusion dies. Its high shock resistance ensures reliable performance in these applications.

Machinability and Weldability of S7 Tool Steel

S7 steel exhibits good machinability, allowing for efficient shaping and forming processes. It can be readily machined using conventional methods such as milling, turning, and drilling. However, due to its high hardness, it is recommended to use appropriate cutting tools and speeds to achieve optimal results.

In terms of weldability, this steel is considered to have fair weldability. Preheating and post-weld heat treatment are often necessary to minimize the risk of cracking and achieve satisfactory weld quality. It is important to follow proper welding procedures and use suitable filler materials to maintain the integrity and properties of the material.

Overall, it combines excellent shock resistance, high impact strength, and good machinability, making it a preferred choice for various applications in the tool and die industry. Its unique properties make it well-suited for applications where toughness and resistance to shock loads are critical factors.



Thermal expansion


Poisson’s ratio 

0.283 lb/in3


70.0 – 75.0%

ratio 0.27-0.30

Chemical Properties





















s7 tool steel

Purchase S7 Tool Steel Bar Stock from O’Hare Precision Metals

When it comes to sourcing high-quality S7 tool steel bar stock, O’Hare Precision Metals is your trusted supplier. With a reputation for excellence and a commitment to customer satisfaction, they offer a wide selection of tool steel bars that meets industry standards and surpasses expectations.

With O’Hare Precision Metals as your supplier, you can expect personalized service and support throughout the purchasing process. Their knowledgeable team can assist you in selecting the right dimensions and grades of S7 tool steel bar stock based on your specific requirements. Whether you need small quantities or bulk orders, O’Hare Precision Metals has the expertise and capabilities to fulfill your needs.

As a customer-oriented company, O’Hare Precision Metals prioritizes efficient order processing and prompt delivery. They understand the importance of timely access to materials for your projects. With their reliable logistics and commitment to meeting deadlines, you can trust that your S7 tool steel bar stock will be delivered to you in a timely manner.

Choose O’Hare Precision Metals as your trusted supplier for S7 tool steel bar stock and experience the quality and reliability they offer. Elevate your tool and die applications with the superior toughness and impact resistance of this steel. With O’Hare Precision Metals, you can be confident in the integrity and performance of the materials you receive. Contact us today to discuss your requirements or request a quote for your steel bar stock needs.