JIS G4304 SUS403 hot-rolled stainless steel plates and coils are widely recognized for their superior mechanical properties, chemical composition, and versatile applications across various industries. This article aims to provide a comprehensive overview of SUS403 stainless steel, including its chemical composition, mechanical properties, heat treatment conditions, dimensional range, impact testing, primary applications, and specific supply cases from TJC Steel Group.

Chemical Composition

JIS G4304 SUS403 stainless steel is characterized by its balanced chemical composition, primarily comprising carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), and nickel (Ni). The specific chemical composition range for SUS403 is as follows:

 Carbon (C): 0.15% max

 Silicon (Si): 0.50% max

 Manganese (Mn): 1.00% max

 Phosphorus (P): 0.040% max

 Sulfur (S): 0.030% max

 Chromium (Cr): 11.50% to 13.00%

 Nickel (Ni): 0.60% max

Mechanical Properties

The SUS403 stainless steel plates and coils exhibit exceptional mechanical properties, making them suitable for a wide range of applications. In the quenched and tempered state, the material possesses a yield strength of at least 390 MPa, an ultimate tensile strength of at least 590 MPa, and an elongation of at least 25%. In the annealed condition, the material exhibits a yield strength of at least 205 MPa and an ultimate tensile strength of at least 440 MPa.

Heat Treatment State

JIS G4304 SUS403 stainless steel plates and coils are typically heat-treated to achieve optimal mechanical properties. The annealing process involves heating the material to a temperature between 800°C and 900°C, followed by slow cooling or quenching at 750°C. Quenching is typically performed at a temperature range of 950°C to 1000°C, with oil cooling. Tempering is carried out at 700°C to 750°C, followed by rapid cooling.

Dimensional Range

SUS403 stainless steel plates and coils are available in various dimensions to meet customer requirements. The thickness range for plates typically varies from a few millimeters to several centimeters, while the width and length can be customized according to specific orders. Coils are available in various diameters and lengths, suitable for further processing into sheets or other forms.

Impact Testing

JIS G4304 SUS403 stainless steel undergoes rigorous impact testing to ensure its suitability for demanding applications. The material is tested at low temperatures to assess its ductility and resistance to cracking. The results of these tests indicate the material's ability to withstand impact loads without failing.

Primary Applications

JIS G4304 SUS403 stainless steel plates and coils find applications in numerous industries due to their excellent properties. These include:

 Petrochemical industry: Used in the manufacture of pipelines, valves, and fittings for handling corrosive chemicals and oil products.

 Chemical processing: Employed in tanks, reactors, and other equipment for handling acids, alkalis, and other chemicals.

 Food processing: Ideal for use in equipment such as slicers, mixers, and juicers due to its corrosion resistance and hygiene properties.

 Automotive industry: Used in exhaust systems and other components requiring high temperature resistance and corrosion protection.

TJC Steel Group Supply Cases

TJC Steel Group, a leading supplier of stainless steel products, has a robust portfolio of supply cases involving JIS G4304 SUS403 stainless steel plates and coils. Some of the key supply cases include:

 Supplying SUS403 stainless steel plates for the construction of a chemical storage facility, ensuring durability and corrosion resistance.

 Providing SUS403 stainless steel coils for the manufacture of exhaust systems for an automotive manufacturer, meeting strict quality and performance requirements.

 Delivering SUS403 stainless steel sheets to a food processing company for use in food cutting and mixing equipment, ensuring hygiene and corrosion resistance.

In conclusion, JIS G4304 SUS403 hot-rolled stainless steel plates and coils offer exceptional properties that make them suitable for a wide range of demanding applications. With their balanced chemical composition, superior mechanical properties, and versatility, these materials are trusted by industries worldwide.