In the realm of stainless steel, JIS G4304 SUS434 hot-rolled stainless steel plates and coils stand out for their exceptional corrosion resistance, mechanical properties, and versatility. This article delves into the chemical composition, mechanical properties, heat treatment state, dimensional specifications, impact testing, primary applications, and supply cases of TJC Steel Group for SUS434 stainless steel.

Chemical Composition

JIS G4304 SUS434 stainless steel boasts a balanced chemical composition that ensures superior performance. It contains a chromium content ranging from 16.00% to 18.00%, which contributes significantly to its corrosion resistance. Additionally, it includes molybdenum in the range of 0.75% to 1.25%, which further enhances its resistance to chloride stress corrosion cracking. Other key elements include carbon (≤0.12%), silicon (≤1.00%), manganese (≤1.00%), sulfur (≤0.030%), and phosphorus (≤0.040%). The low nickel content (≤0.60%) maintains the alloy's cost-effectiveness while still providing adequate corrosion resistance.

Mechanical Properties

JIS G4304 SUS434 stainless steel exhibits exceptional mechanical properties. Its tensile strength is ≥450 MPa, while the yield strength is ≥205 MPa. The elongation at break is ≥22%, indicating good ductility. The reduction of area is ≥60%, signifying excellent formability. The hardness, measured on the Brinell scale, is ≤183HB.

Heat Treatment State

SUS434 stainless steel undergoes heat treatment to optimize its properties. Annealing, typically conducted at temperatures ranging from 780°C to 850°C, improves the material's internal structure, resulting in better plasticity and toughness. Quenching, achieved through rapid cooling after heating to 950°C to 1050°C, increases the hardness and strength of the steel.

Dimensional Specifications

JIS G4304 SUS434 stainless steel plates and coils adhere to strict dimensional specifications. The thickness and width tolerances are governed by ISO 9444, ensuring consistency and accuracy. This allows for precise cutting and processing, meeting the demands of various applications.

Impact Testing

JIS G4304 SUS434 stainless steel undergoes rigorous impact testing to ensure its suitability for demanding applications. The test results validate the material's ability to withstand sudden impacts without fracturing or failing.

Primary Applications

JIS G4304 SUS434 stainless steel finds widespread use in various industries. Its corrosion resistance and formability make it a popular choice for automotive exterior trim, heat-resistant appliances, home appliances, and cutlery. Additionally, its ability to withstand chloride stress corrosion cracking ensures its suitability for applications involving saltwater or chlorinated environments.

TJC Steel Group Supply Cases

TJC Steel Group, a leading supplier of stainless steel products, has a robust portfolio of JIS G4304 SUS434 hot-rolled stainless steel plates and coils. The company has supplied these materials to numerous projects in the automotive, construction, and chemical processing industries. One such case involved the supply of SUS434 stainless steel coils for the exterior trim of a premium automobile model. The material's corrosion resistance and aesthetic appeal were key factors in its selection.

In conclusion, JIS G4304 SUS434 hot-rolled stainless steel plates and coils offer a compelling combination of corrosion resistance, mechanical properties, and versatility. Their applications span diverse industries, and TJC Steel Group remains a trusted supplier of these high-performance materials.