Continuous hot rolling steel plate and strip (GB/T2519-1981)
The continuous hot rolling steel plate and strip, referred to as the GB/T2519-1981, is a hot rolled steel product which is employed in the production of metallic constructions. It is produced by hot rolling in order to obtain the required form, shape and size. Hot rolling is the process of applying high temperature and pressure to the steel, in order to form it into the desired shape.
The GB/T2519-1981 hot rolled steel plate and strip is specifically designed to meet the requirements of the Chinese National Standard of GB/T 2519-1981. This standard covers the technical requirements as well as inspection and tests for the hot rolled steel plates and strips intended to be used for metallic constructions. It includes the requirements for the characteristics of the steel, the range of sizes and the tolerances for the product.
Furthermore, the GB/T2519-1981 specifies the chemical composition of the hot rolled steel plates and strips. It limits certain elements like sulphur, phosphorus and chlorine which can have a detrimental effect on the structural integrity of the product. At the same time, it sets a maximum amount of permissible trace elements which can still result in an acceptable product.
The standards also specifies the mechanical properties of the hot rolled steel plate and strip. It sets limits to the tensile strength, yield strength, elongation, impact strength, hardness and other properties which play an important role in determining the structural integrity of the product.
Moreover, the GB/T2519-1981 also includes specifications for the surface condition of the hot rolled steel plate and strip. It sets limits to the amounts of scale, defects and other defects which can shall be found on the products. It also sets limits to the intensity of any surface irregularities.
The testing and inspection requirements of the GB/T2519-1981 are provided in order to ensure the conformance of the products to the established quality and performance criteria. It requires chemical tests, visual inspection, destructive tests and other tests which aim to verify the quality and performance of the hot rolled steel plate and strip.
In conclusion, the GB/T2519-1981 hot rolled steel plate and strip is a product which is employed in the production of metallic constructions. This standard includes the specifications of the chemical composition, mechanical properties, surface condition and testing and inspection requirements of the hot rolled steel plate and strip. These specifications aim to ensure that the hot rolled steel plate and strip produced meets the required quality and performance for use in metallic constructions.
