Hot-rolling and equal angle steel (GB 9787- 88)
Hot rolling and equal angle steel (GB 9787-88) is a hot-rolled steels and angle steels that conform to the national standards of China for the products. Hot-rolling and equal angle steel (GB 9787-88) are widely used in many areas such as light industry, machinery production, construction and transportation fields.
Hot-rolling and equal angle steel (GB 9787-88) is composed of iron, carbon and manganese. Its yield strength ranges from 205MPa to 390MPa, while the tensile strength ranges from 270MPa to 470MPa. In addition to high strength, hot-rolling and equal angle steel (GB 9787-88) also features with good toughness, plasticity and welding properties.
Hot-rolling and equal angle steel (GB 9787-88) are divided into equal angle steel and unequal angle steel. The unequal angle steel which is rebar is usually in the following specifications: 75mm*50mm*6mm；90mm*56mm*6mm；100mm*70mm*7mm and so on. The unequal angle steel used for structures often have specifications as: 120mm*63/64/68*7mm；140mm*73/74/77/78/80*7mm；160mm*90/91/93/94/97*8mm and so on.
The most commonly used of the hot-rolling and equal angle steel (GB 9787-88) are for ships, bridge, boiler, high pressure vessels, oil pipelines, pressure vessels, automobile frame and construction. Besides, hot-rolling and equal angle steel (GB 9787-88) are also widely used as loading machines, construction machines, metal materials, farm tools and road construction tools, etc.
In the manufacture of hot-rolling and equal angle steel (GB 9787-88), the steel is heated up to a temperature above the transformation temperature before deformation to improve its plastic properties. After the steel is formed, it is cooled down in a certain way to affect its structure and properties. Steel surface treatment such as galvanizing and oil coating can greatly improve corrosion resistance and resistance to aging.
Due to their excellent performance, hot-rolling and equal angle steel (GB 9787-88) is widely used in many industries. It is an important material for maintaining the stability of main structure and components as well as carrying various loads. Therefore, choosing the appropriate steel level and surface treatment has become the key to material selection.
