We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.
High quality piping products from approved manufacturers.
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Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.
Thick-walled square tubes are known for their robust performance in demanding applications, offering a combination of large sizes, high strength, and exceptional durability. Here are some of the key performance features of thick-walled square tubes.
Super Steel Manufacturing Co.,Ltd is professional thick-walled square tubes manufacturer, for more details, please contact:sales@super-steels.com
Large Format
The production of thick-walled square tubes has reached impressive sizes, with the largest production line by Nippon Steel offering specifications up to 550mm550mm22mm. In contrast, the largest square and rectangular tubes produced in Europe and the United States are typically limited to 400mm400mm12.7mm.
High Strength
To reduce weight while enhancing safety features like earthquake and impact resistance, high-strength steel is commonly used in thick-walled square tubes. The material strength has reached limits of 630MPa or even higher, making these tubes highly resilient in structural applications.
Super Thick Product Design
These tubes are produced with a maximum thickness of up to 19mm. The impressive thickness is not only a testament to their size but also indicates the difficulty involved in their cold forming. The side thickness ratio—indicating the relative thickness—is a critical measure of product complexity.
Fire Resistance
Thick-walled square tubes made from B490RNQ hot-rolled steel excel in fire resistance. These tubes surpass the mechanical properties of the national standard Q345B at room temperature, providing equal or superior forming performance. Furthermore, their yield strength ratio adheres to national construction industry regulations on earthquake resistance. The high-temperature performance of these tubes also significantly outperforms that of Q345B, enhancing their suitability for fire-prone environments.
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