Chemical composition(%)

Mechanical properties

High International Recognition: Adhering to the Japanese JIS G3101 standard, it is a globally recognized basic structural steel grade, especially popular in Southeast Asia, Japan, South Korea, and the Middle East, resulting in low export communication costs.

Excellent Comprehensive Processing Performance: Low-carbon design, simple welding process, high-quality welding without preheating, and no risk of welding cracks; easily adaptable to cold working processes such as bending, stamping, cutting, and rolling; strong downstream secondary processing adaptability, requiring no additional customer processing, suitable for export processing needs in hardware, steel structures, etc.

Extremely High Cost-Effectiveness: No alloying elements added, mature smelting process, low production cost, and affordable pricing; more price-competitive than low-alloy steel plates such as Q355B, making it the preferred material for basic infrastructure and light industry.

Wide Applications and Stable Demand: Suitable for various scenarios such as building steel structures, machinery bases, bridge supports, hardware accessories, and container manufacturing; stable export market demand, eliminating concerns about application limitations, and suitable for export needs in multiple regions.

JIS SS400 Product Disadvantages:

Moderate strength, unsuitable for heavy-duty applications: Tensile strength 400-510MPa, yield strength up to 245MPa, lower than low-alloy steel plates such as Q355B, making it unsuitable for heavy-duty, high-stress structural applications such as main beams of high-rise buildings, heavy engineering machinery, and high-pressure vessels.

No impact performance requirements: Impact testing is not mandatory; low-temperature toughness is average, unsuitable for frigid regions such as Northern Europe and northern Russia.

Poor corrosion resistance: Lacking anti-corrosion alloying elements, prone to rusting during open-air storage or sea transport; requires anti-corrosion treatment such as painting and galvanizing for export.

Our factory's advantages in producing JIS SS400 series products:

Our factory strictly adheres to the JIS G3101 standard in production, deeply aligning with its core requirements for SS400 steel. We also incorporate the "same line, same standard, same quality" management philosophy to ensure product quality meets both domestic and overseas acceptance standards, achieving consistent quality for both domestic and international markets. Leveraging mature smelting processes, we precisely control the content of basic elements such as C, Si, and Mn, and strictly control the P and S impurity content to ≤0.050%, addressing the weakness of the relatively lenient chemical composition control in the SS400 standard. Each batch of products comes with a complete original material certificate (MTC), clearly indicating core information such as chemical composition, mechanical properties, and furnace batch number. This information can be verified through third-party testing, fully meeting export quality inspection and overseas customer acceptance requirements. Batch quality fluctuations are minimal, significantly reducing customer complaint risks. Furthermore, we utilize advanced rolling technology to optimize the grain structure, further enhancing the plasticity and toughness of the steel plate, making our products outperform similar products from ordinary manufacturers.