JIS G4304 SUS630 hot-rolled stainless steel plates and coils are a high-performance material that stands out for their exceptional properties and versatility. This article delves into the chemical composition, mechanical properties, heat treatment status, dimensional range, impact testing, primary applications, and supply cases by TJC Steel Group.

Chemical Composition

SUS630 stainless steel boasts a unique chemical composition that contributes to its superior performance. The alloy contains carbon (C) at a maximum of 0.07%, silicon (Si) up to 1.00%, manganese (Mn) not exceeding 1.00%, sulfur (S) and phosphorus (P) both limited to 0.030% and 0.035% respectively. The chromium (Cr) content ranges from 15.50% to 17.50%, nickel (Ni) between 3.00% and 5.00%, copper (Cu) from 3.00% to 5.00%, and niobium (Nb) between 0.15% and 0.45%. This composition ensures both strength and corrosion resistance.

Mechanical Properties

The SUS630 alloy exhibits remarkable mechanical properties, including high tensile strength and yield strength. After heat treatment, the material can achieve a tensile strength of over 740 N/mm² and a yield strength of over 540 N/mm², coupled with an elongation of at least 12% and a reduction in area of at least 40%. The hardness ranges from 217 HB to over 375 HB, depending on the heat treatment conditions.

Heat Treatment Status

SUS630 stainless steel plates and coils are typically supplied in a heat-treated condition. The heat treatment process involves solid solution treatment at a temperature range of 1020°C to 1060°C, followed by rapid cooling. Ageing treatments at various temperatures, including 470°C to 490°C, 540°C to 560°C, 570°C to 590°C, and 610°C to 630°C, are also applied to enhance the mechanical properties.

Dimensional Range

JIS G4304 SUS630 hot-rolled stainless steel plates and coils are available in a wide range of dimensions. The thickness of the plates can vary from millimeters to several centimeters, depending on the specific application. The coils are available in various widths and lengths, tailored to meet customer requirements.

Impact Testing

To ensure the material's reliability and durability, SUS630 stainless steel undergoes rigorous impact testing. These tests evaluate the material's resistance to sudden applied loads and its ability to withstand impact without fracturing. The results of these tests further validate the material's suitability for high-stress applications.

Primary Applications

JIS G4304 SUS630 hot-rolled stainless steel plates and coils find extensive use in various industries. Their high strength, corrosion resistance, and wear resistance make them ideal for applications such as high-pressure vessels, turbine blades, valve components, and other critical parts in the aerospace, petrochemical, and power generation industries. The material is also used in the medical field for surgical instruments and implants due to its biocompatibility.

TJC Steel Group Supply Cases

TJC Steel Group has a rich history of supplying JIS G4304 SUS630 hot-rolled stainless steel plates and coils to various industries. Some notable cases include the supply of large-scale plates for turbine components in an aerospace project and the provision of coils for the manufacturing of chemical reactor vessels in a petrochemical plant. TJC Steel Group's commitment to quality and timely delivery has earned it a reputation as a trusted supplier of high-performance stainless steel materials.