GB/T 16270-1996 High Strength Structural Steel Heat Treatment and Rolling Steel Plate, Steel Strip
GB/T 16270-1996 High Strength Structural Steel Heat Treatment and Rolling Steel Plate, Steel Strip provides the requirements and test methods for the heat treatment and rolling of high strength structural steel plate, steel strip, and steel-clad sheet, as well as the quality requirements and verification methods for their use. The heat treatments covered by this standard are hot rolling, normalizing and tempering. This standard does not apply to special steel products.
The high strength structural steel referenced in this standard is divided into five classes based on their specified yield strength levels of 395 MPa (680710ksi), 485 MPa (708834 ksi), 590 MPa (849906 ksi), 690 MPa (9921190 ksi), and 885 MPa (12881556 ksi). The delivery states include hot rolling and normalizing and tempering. The steel products must be heat-treated according to specified processes before they can be used.
The protection of high strength structural steel should be considered in the design development and selection stages. For example, the deformation characteristics of the material should be considered, as well as the effects of steel grade, heat treatment, size, surface roughness, shape, and mechanical properties. The selection of steel structure parameters is based on the applicable standards.
In addition, reasonable surface roughness should be ensured for the steel products. The surface roughness of fish and edges should be reduced to the best condition, which can meet the requirements for a particular purpose.
Additionally, GB/T 16270-1996 includes several changes from other standards. The notion of austenization temperature and tempering temperature is introduced, with recommended values specified in the standard. Furthermore, surface inspection is mandatory and the selection of test methods is based on the requirements of the user.
In conclusion, GB/T 16270-1996 High Strength Structural Steel Heat-Treatment and Rolling Steel Plate and Steel Strips provides technical requirements and test methods for hot rolling, normalizing and tempering of high-strength structural steel plates, steel strips and clad steel sheets, as well as the quality requirements and verification methods for application. The standard also defines the austenization temperature, tempering temperature and surface roughness.
