GB 699-88 Standard for High Quality Carbon Structural Steel
GB 699-88 Standard for High Quality Carbon Structural Steel is a Chinese standard for certification of steel and other related products intended for use in buildings, bridges and other structures. The primary purpose of the standard is to provide high-quality materials for use in high-demand situations, such as buildings made with multiple stories or buildings that are intended for regular use in harsh weather conditions. The standard outlines the requirements for the quality of the steel, including the need for adequate strength and the need for the steel to resist corrosion.
The Standard for High Quality Carbon Structural Steel requires the steel to contain certain elements and amounts of those elements. The elements required include carbon, manganese, silicon, and phosphorous. The amounts of each element allowed can be found in the specification provided by the standard. The steel must adhere to the specified tolerances, including diameter, length and thickness. Additionally, the steel must meet certain quality assurance criteria, such as resistance to corrosion, ductility and elongation, hardness, and grain size.
The steel’s test results must be reviewed prior to being accepted as a part of the Standard for High Quality Carbon Structural Steel. The steel must meet the specified requirements in order to be accepted. Test results will typically include visual inspection of the properties, as well as testing related to the strength and durability of the steel.
The Standard for High Quality Carbon Structural Steel stipulates that steel with a carbon content lesser than or equal to 0.15% should not be used in constructions which will be subjected to severe or cyclic conditions or high temperatures. The Standard also requires that all steel used in construction should conform to certain value criteria. This is to ensure that the steel can provide sufficient strength for the application it is intended for.
The Standard for High Quality Carbon Structural Steel also provides safety guidelines for the use of steel in various applications. This includes precautions that should be taken to prevent injury from bending or other adverse effects of failure. Additionally, the standards outline methods for testing the quality of steel to ensure that it meets the necessary requirements.
The Standard for High Quality Carbon Structural Steel is an important part of safety regulations for the construction industry in China. It provides requirements for the quality of steel and its various parts, and it sets the standards for steel that is used in various applications. As such, the standards are designed to provide high-quality materials that are intended to perform under demanding circumstances.
