，介绍GB/T6723-1986《通用冷弯开口型钢》的标准。
General Cold-Bent Open Section Steel GB/T6723-1986
GB/T6723-1986, the standard for General Cold-Bent Open Section Steel, specifies the requirements, standards, and test methods for constructing cold-bent open sections for use in reinforced concrete structures, steel latticed towers, and light steel structures. This standard covers the following points: profile and dimensional tolerance, surface condition, mechanical properties, inspection requirements and test methods.
The cold-bent open section steel covered by this standard includes homogeneous steel, aluminium-zinc alloy steel and stainless steel. Steel of different grades such as Q195, Q215, Q235, etc. is used to manufacture cold-bent open sections. The profile of products made of carbon steel is the same as that of the former GB8662 standard.
The dimensions and tolerances of cold-bent open section steel products specified by GB/T6723-1986 are basically the same as those specified by the former GB8662 standard. The size ranges from 10mm to 200mm in height and 2.5mm to 10mm in thickness.
The surface condition of the steel should comply with the requirements of the standard, including straightness, flatness, rust, peeling and other defects.The mechanical properties that must be met include elongation rate, yield strength, tensile strength, etc., which vary depending on the type and grade of steel used.
Inspection requirements should be met before and after the production process, as per the requirements of GB/T6723-1986.The test methods specified by the standard include mechanical tests such as tensile test, flattening test, bending test, etc.
In conclusion, GB/T6723-1986 is a comprehensive standard for the production of general cold-bent open section steel. It specifies the requirements, standards and test methods needed to manufacture cold-bent open sections for the purpose of constructing reinforced concrete structures, steel latticed towers and light steel structures. By following these requirements and standards, production of cold-bent open section steel products is ensure to be of high quality and safe to use.
