Heat-treated stainless steel [TOKUSHU KINZOKU EXCEL CO., LTD.]
SUS420J2, RB-S, RB-X
This is heat-treated stainless steel. It is recommended for customers seeking the unique properties and hardness of stainless steel, as well as high quality!
Unlike carbon steel, which hardens through heat treatment, there are few materials that harden in this way, limited to precipitation hardening systems and medium to high carbon chromium stainless steels. Martensitic stainless steel, while being a type of stainless steel, has a higher carbon content, allowing it to be hardened significantly through quenching and tempering, similar to carbon steel. Most customers who use this material after quenching apply heat treatment after forming it into various products. However, in recent years, advancements in processing equipment and techniques aimed at rationalization have made it possible to produce efficient products with minimal variation, even from extremely hard materials like hardened steel strips and quenched steel strips, through continuous pressing or cutting. As a result, heat treatment after processing the product has become complicated in terms of quality control and work management, leading to lower productivity. Consequently, there is a growing trend to switch from quenching after forming to using pre-hardened steel strips. Our company responds to the needs of customers seeking the unique properties and hardness of stainless steel, as well as high quality, by providing pre-hardened stainless steel strips. *The quenching process for SUS420J2 is primarily conducted at our Shanghai factory. For more details, please refer to the related links or feel free to contact us.
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basic information
<Materials Handled> - SUS420J2 - RB-S - RB-X <Manufacturable Dimensions> Thickness: 0.30 to 2.0mm Width: 3.0 to 250mm The available dimensions, delivery times, and prices may vary depending on the material, so please feel free to contact us.
Price range
Delivery Time
Applications/Examples of results
Various types of springs, cutting tools, straight rulers, soldering irons, spatulas, doctor blades, spinning machines.
Line up（3）
| Model number | overview |
|---|---|
| SUS420J2 | This material is widely used in various fields in terms of marketability and price among martensitic stainless steels. In our annealed finish state, the carbides are completely spheroidized, making it easy to process and improving its hardenability. |
| RB-S [Proprietary Product] | With a higher carbon content than SUS420J2, it has significant hardening upon quenching, achieving one of the highest levels of hardness among stainless steels. Although it is quite hard even in an annealed finish, it is not suitable for complex processing, but it is an optimal material for cutting tool applications. |
| RB-X [Proprietary Product] | This material has a higher chromium content than RB-S and includes nickel and molybdenum. Although the carbon content is slightly lower than RB-S, resulting in a slight decrease in hardness after quenching, the addition of chromium, nickel, and molybdenum provides excellent corrosion resistance. |
Company information
TOKKIN's materials are everywhere around you, even though you can't see them! TOKKIN is a precision metal materials manufacturer founded in 1940. We produce high-quality, high-value-added materials according to the each customer specifications, such as processing metals into thin strips or sheets by cold rolling to improve mechanical properties, cladding different materials to form a single material, and applying resin or solder to metal surfaces. Our materials are used in a wide range of products, from daily life gadgets such as smart devices, PCs, automobiles, and game consoles to industrial equipment such as semiconductor manufacturing equipment, medical equipment, and textile machinery. Although our material is mostly invisible, it plays an indispensable role in ensuring that the products and their supporting components function well. High-functional materials, made possible only by TOKKIN, support the technologies that are created one after another behind the scenes.