Q/BQB 402-2003 is an enterprise standard issued by Baoshan Iron and Steel Co., LTD., which mainly stipulates the classification, code, size, shape, weight, technical requirements, inspection and testing, packaging, marking and quality certificate of cold continuous rolled carbon steel plate and steel strip. This standard is designed for the company's production of cold continuous rolled carbon plates and steel strips with thicknesses ranging from 0.30mm to 3.5mm.
Features of Q/BQB 402-2003
Standard: The standard specifies the parameters of the steel plate and steel strip in detail to ensure the standardization and consistency of the product.
The classification is clear: according to different uses, surface quality, surface structure and heat treatment types, the steel plate and steel strip are classified in detail.
Wide applicability: The steel plate and steel strip under this standard can be widely used in many fields to meet different needs.
Chemical composition of Q/BQB 402-2003
The carbon (C) content will vary depending on the grade, for example SPCC has a carbon content of 0.12 or less, while SPCE has a lower carbon content.
The content of manganese (Mn) is also controlled, such as in SPCC, the content of manganese is less than 0.50.
The content of phosphorus (P) and sulfur (S) is also limited to ensure the quality and performance of the steel.
Delivery status of Q/BQB 402-2003
The delivery condition of steel plates and strips is usually the product after cold continuous rolling, annealing and flat treatment.
Specific delivery conditions (such as annealing, leveling or other heat treatment methods) may be adjusted according to customer requirements and indicated in the warranty.
Mechanical properties of Q/BQB 402-2003
Mechanical properties such as tensile strength (Rm) and yield strength (Rp0.2) will vary according to different brands.
Elongation after fracture is also one of the important indexes to measure the mechanical properties of steel plate and steel strip.
Q/BQB 402-2003 application scope
Automotive industry: Used to manufacture automobile body, chassis and other parts, requiring good formability and weldability.
Electronics industry: Used to manufacture enclosures and structural parts of electronic equipment, requiring high precision and flat surfaces.
Construction industry: In the construction industry, this steel plate and steel strip can be used to manufacture steel structures, doors and Windows.
Other manufacturing: such as furniture, hardware products and other manufacturing industries, the standard under the steel plate and steel strip are also widely used.