THE JAPAN STEEL WORKS、LTD Product Lineup

Low thermal expansion materials (Invar) are characterized by their small thermal expansion coefficient near room temperature. Our company has a substantial track record of supplying various materials, including the representative iron-36% nickel alloy, as well as mask materials that require high cleanliness, and components for precision instruments. [Features] - A large number of delivery records not only for Invar alloys but also for Super Invar, 42 Alloy, Kovar, and others. - Utilizing unique technology, we provide reliable materials for large products that are difficult to manufacture by other companies, as well as medium and small-sized products. - Detailed technical support from our research team, as well as prototype development and material development, are also available. *For more details, please refer to the PDF document or feel free to contact us.

The 'VMCX', manufactured using technology cultivated through years of stringent quality requirements in production, is widely adopted as forged steel material for large products that demand high performance and reliability, as well as for medium and small-sized products. Not only does it offer strength and toughness, but its high hardenability and low segregation allow for larger sizes, smaller sizes, longer lifespans, and higher reliability. It is used in a wide range of applications, including mandrels, drilling punches, anvil components, hydrogen accumulators for hydrogen stations, and marine structures. 【Features】 ■ High strength ■ High toughness ■ High hardenability ■ Low segregation ■ Hydrogen resistance *For more details, please refer to the PDF document or feel free to contact us.

**Main Features** - It demonstrates high strength and high toughness through solid solution strengthening with high nitrogen addition and appropriate cold working. - The permeability is equivalent to that of austenitic stainless steel, showing stable non-magnetic properties. - As a retaining ring for motors used in generators and gas pipelines, which require high reliability, over 20,000 units have been manufactured to date. *For more details, please download the PDF or contact us directly.*

We have a track record of supplying materials for paper manufacturing and bridge components that require corrosion resistance, and we are also capable of producing raw materials such as forged and rolled materials. We have a research facility in Muroran, where we can respond to various needs, including material development and proposals for optimal processes. For example, in ultra-thick duplex stainless steel, the cooling rate slows down, causing the σ phase to precipitate and reducing ductility and corrosion resistance. However, through our original component design, it is possible to suppress the σ phase. We also have various machining equipment, allowing us to deliver not only simple round bar and pipe shapes but also components and parts in the shapes required by our customers. *For more details, please refer to the PDF document or feel free to contact us.

Our company handles "precipitation hardening stainless steel." ■ We have established manufacturing technology for 17-4PH (ASTM A564 630) and 15-5PH (ASTM A564 XM-12) stainless steel materials. ■ We have a proven track record of numerous deliveries for components used in chemical plants and pressure vessels, where high strength and corrosion resistance are required. ■ We also possess various equipment that supports manufacturing. With a robust system in place, we provide high-reliability materials for large, medium, and small products. 【Features】 ■ Established manufacturing technology for 17-4PH (ASTM A564 type 630) and 15-5PH (ASTM A564 grade XM-12) stainless steel materials. ■ Numerous delivery records available. *For more details, please refer to the PDF document or feel free to contact us.

This is a plastic molding die steel developed for design surfaces requiring high mirror finish, such as car windows (transparent) and TV frames. Thanks to our unique precipitation control technology, it maintains machinability equivalent to conventional steel while providing high toughness, as well as excellent rust resistance and polishability (high mirror finish). The hardness is almost uniform from the surface to the center, making it a pre-hardened type that can be used as is. The enhancement of toughness has also improved reliability against high cycle heat and cool processes. Please take a moment to read through it. 【Contents (excerpt)】 ■ Features ■ Chemical composition ■ Microstructure ■ Cleanliness ■ Polishability *For more details, please refer to the PDF document or feel free to contact us.

【VMCX Steel】 Our developed material VMCX (NiCrMoV steel) ensures uniform hardness even in the center of large materials due to its high hardenability, making it suitable for extremely thick products over 1,000mm, such as molds for giga casting (main molds). Additionally, its excellent strength and toughness allow for thinner and smaller molds, while also promising a longer lifespan. As a pre-hardened steel that does not require tempering heat treatment after machining, it is expected to reduce mold manufacturing costs. 【Improved P20 Steel】 Improved P20 steel has better internal homogeneity and machinability than P20 steel due to unique compositional enhancements, and it has a long history of being manufactured and supplied as a material for plastic molding molds since the 1980s. There is very little hardness reduction in the center of extremely thick products, and it can be produced up to a maximum weight of 23 tons and a thickness of 1,000mm. As a pre-hardened steel that does not require tempering heat treatment after machining, it is also expected to reduce mold manufacturing costs. *For more details, please refer to the PDF document or feel free to contact us.*