Hot Rolling Unequal Angled Steels (GB/T9788-1988)
Unequal angle steel is a kind of steel whose cross section is not equal within the range of 5 mm to 30 mm. It is one of the most commonly used structural steel products for engineering, mechanical and other construction related uses due to its strength and durability. Unequal angle steel is sometimes also referred to as unequal angle iron.
Unequal angle steel is produced using hot rolling. Hot rolling is a process wherein steel is placed in a furnace and heated to very high temperatures, usually in excess of 1100°C. The steel is then passed through a series of rolling mills wherein it is compressed and flattened into the desired thickness and shape. The final product is an equilateral steel bar known as an angle that is slightly tapered at the ends.
Unequal angle steel has been used in a variety of structures included bridges, transmission towers, ships, industrial buildings and residential constructions. Hot rolling is a very cost effective and efficient method of production when compared to cold rolling. It results in a stronger and more consistent product with improved mechanical properties. Unequal angle steel bars require little to no post-production processing such as bending, machining or welding.
Unequal angle steel produced in accordance with the Chinese standard GB/T 9788-1988. This standard specifies the requirements for hot rolled unequal angle steel and its quality, size, shape and tolerance. It also covers the guidelines for heat treatment of unequal angle steel.
Unequal angle steel is available in a variety of sizes and thicknesses, depending on the needs of the project. The standard length for unequal angle steel bars is 6 metres, although some suppliers may offer unequal length bars. As the thickness of the bar varies, so does the weight. Generally most suppliers keep a wide range of weights and sizes in stock.
Unequal angle steel is a highly popular form of steel used in numerous construction projects as it provides excellent support and strength as well as being cost effective. It is highly durable and has high tolerance levels, allowing it to be used in a variety of applications. Manufactured in accordance with the Chinese standard GB/T 9788-1988, unequal angle steel is a highly versatile product used in a variety of structures.
