Hot Rolled Round and Square Steel (GB 702-86)
Steel is an important component in the construction industry, having a range of applications from bridges to buildings. Hot rolled round and square steel produced according to GB 702-86 are one of the leading steel products produced in China, having excellent properties for their use in the building and construction industry. This article will discuss the specifications and properties of Hot Rolled Round and Square Steel produced according to GB 702-86.
GB 702-86 is a standard used to grade steel according to its chemical composition, mechanical properties and surface finish. It is divided into different grade levels according to the application they are traditionally used for. Hot Rolled Round and Square Steel produced according to this standard are typically classed as Grade I-IV, where I is the highest grade and IV is the lowest grade. Hot rolled round and square steel Grade I and Grade II according to this standard have higher mechanical properties and surface finish than Grade III and Grade IV.
The specifications of Hot Rolled Round and Square Steel are dependent on the grade it is classified as. Grade I steel has a Carbon content of 0.30-0.50%, a Tensile Strength of 420-540Mpa, a Yield Strength of 220-315Mpa and an Elongation of 22%-26%, whereas Grade IV steel has a Carbon content of 0.10-0.30%, a Tensile Strength of 280-400MPa, a Yield Strength of 113-196Mpa and an Elongation of 12%-16%.
Properties of Hot Rolled Round and Square Steel
Hot Rolled Round and Square Steel produced according to GB 702-86 has excellent properties which make it highly suitable for use in the construction industry. It has excellent corrosion resistance which is why it is often used for bridges and other structures with exposure to harsh weather conditions. It has a high yield strength which makes it ideal for use in load bearing applications such as columns and beams in buildings. Finally, it has excellent ductility, meaning it can easily be formed in to complex shapes, making it suitable for a range of applications.
Applications of Hot Rolled Round and Square Steel
Due to its excellent properties, Hot Rolled Round and Square Steel produced according to GB 702-86 is highly suitable for use in construction. It is often used for general structural purposes such as beams, columns and trusses, as well as for bridges, buildings and other structures exposed to harsh weather conditions. It is also often used for manufacturing tubes, pipes, rods and sheets.
Conclusion
Hot Rolled Round and Square Steel produced according to GB 702-86 is a high grade steel product with excellent properties. It has excellent corrosion resistance, a high yield strength and good ductility, making it suitable for a range of applications in the construction and building industry.
