Hot-rolled steel strip for pipelines with high toughness of Baosteel
The Baosteel pipeline steel strip for high toughness can be applied in such fields as ductile iron pipe, steel pipe, oil casing, steel wire and other steel products. It has excellent cold bending performance, high molding performance, strain resistance and impact absorption, and is especially suitable for the manufacture of fine grain quality structural steel products. In addition, it can also be used for welding structural components and manufacturing ship panels, tanks and special welded structural components.
The hot-rolled steel strip for pipelines with high toughness of Baosteel is a kind of high-quality steel strip specially developed for pipeline applications. It is made of Baosteels own steel strip with superior metallurgical characteristics such as higher strength and better weldability. With the characteristic of excellent cold-bending performance, it has the advantages of high impact toughness, uniform tensile characteristics, good toughness balance and easy tear.
Generally, the process used in the manufacture of hot-rolled steel strip for pipelines with high toughness of Baosteel is hot rolling. Hot rolling is the process of heating steel billets above the recrystallization temperature and rolling them into steel strips. After hot rolling, the thickness of the steel strip is reduced by a large margin, which is about 30%-90%. The outside diameter of the steel strip is large, the cross section is trapezoidal, and the thickness at the two ends is different.
The analyzed steel chemical components of hot-rolled steel strip for pipelines with high toughness of Baosteel are mainly C, Mn and P. These components are important for the stability of the physical and chemical properties of the steel, and also have large effects on the performance and mechanical properties of pipeline steel strip. The chemical components of the high toughness Baosteels steel strip for pipelines are C: 0.17-0.24%, Mn: 0.90-1.20%, P: 0.035% (max) and S: 0.035% (max).
The mechanical properties of Baosteels steel strip for pipelines with high toughness are excellent. Its yield strength is 530-560 MPa, tensile strength is 570-620 MPa and elongation rate is 17-23%. Its impact energy at 0 ºC is 36 J/cm2 and at -20 ºC is 27 J/cm2. The carbon equivalent of the steel strip is 0.38-0.45, and its microalloying level is medium. This assured the toughness, ductility and weldability of the steel strip.
In conclusion, Baosteels hot rolled steel strip for high toughness pipelines is a reliable material for pipelines and related products. The superior mechanical properties, high strength and superior cold-bending performance make it ideal for a wide range of industrial applications, such as oil casing, steel pipes, electrical power pipelines and gas pipelines. Its excellent weldability, strict quality control and comprehensive after-sales service make it very popular in the market.
