JIS G4304 SUS440A hot-rolled stainless steel plates and coils are highly regarded in the industrial sector for their superior performance and wide range of applications. These stainless steel materials adhere to the rigorous quality standards set forth by the Japanese Industrial Standards (JIS), ensuring consistent quality and reliability.

Chemical Composition

SUS440A stainless steel is composed of a precise blend of elements that impart its unique properties. The key chemical components include carbon (C) ranging from 0.60 to 0.75%, chromium (Cr) between 16.00 and 18.00%, and nickel (Ni) not exceeding 0.60%. Other elements such as silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), molybdenum (Mo), and nitrogen (N) are also present in specified percentages.

Mechanical Properties

This high-chromium martensitic stainless steel exhibits excellent mechanical properties. After quenching and tempering, SUS440A achieves a hardness of 54 HRC or higher, while maintaining a tensile strength of 2000 MPa or more and a yield strength of 1900 MPa or greater. The elongation percentage stands at over 9%, ensuring good ductility and formability.

Heat Treatment Condition

The heat treatment of SUS440A stainless steel involves annealing at temperatures ranging from 800 to 920°C followed by quenching at 1010 to 1070°C and tempering at 100 to 180°C. This process optimizes the material's microstructure, resulting in the desired hardness, strength, and corrosion resistance.

Dimensional Range

JIS G4304 SUS440A stainless steel plates and coils are available in various thicknesses, widths, and lengths, catering to diverse industrial needs. The precise dimensional range is specified according to the requirements of the end-user and the application.

Impact Testing

To ensure the material's resilience and durability, SUS440A stainless steel undergoes rigorous impact testing. The material demonstrates excellent impact resistance, ensuring its suitability for demanding applications where impact loads are anticipated.

Key Applications

SUS440A stainless steel finds widespread use in various industries due to its superior hardness, corrosion resistance, and mechanical properties. It is commonly used in the manufacture of high-end kitchen knives, surgical instruments, bearings, valves, and other precision mechanical components.

TJC Steel Group Supply Cases

As a leading supplier of stainless steel materials, TJC Steel Group has a robust portfolio of supply cases involving JIS G4304 SUS440A hot-rolled stainless steel plates and coils. From surgical equipment manufacturers to knife manufacturers, we have catered to the specific needs of various industries, providing them with high-quality stainless steel materials that meet their exacting standards.

In conclusion, JIS G4304 SUS440A hot-rolled stainless steel plates and coils are a reliable choice for industries requiring materials with superior mechanical properties and corrosion resistance. TJC Steel Group's expertise in supplying these materials ensures that our customers receive the best-suited materials for their specific applications.