CBIES AUTOMOTIVE|Common Terms Used in Steel Standards
CBIES AUTOMOTIVE is a long-term deep plowing auto parts enterprise, the main export of automotive pipe fittings, exported to countries around the world, every day and still has a close connection, including side door crash bars, shock absorber tubes, exhaust pipes, seats, and instrument cross-member tubes and other raw material plates, processing pipe fittings, can not be separated from our steel. And steel only also has some standard common terms. Here's a summary for you.
A. Standards: The standards implemented for steel products in China are national standards (GB, GB/T), industry standards (YB), local standards, and enterprise standards.
B. Technical conditions: Technical conditions refer to the performance indicators and quality requirements that should be achieved by the product as specified in the standards implemented for steel products, such as chemical composition, external dimensions, surface quality, physical properties, mechanical properties, process properties, internal organization, and delivery condition.
C. Quality certificate: the production of metal materials and other industrial products, the same as the production of the same standard regulations, the implementation of the product factory inspection system, unqualified metal materials are not allowed to deliver. For the delivery of metal materials, the production plant needs to provide quality certificates to ensure its quality. The quality certificate of metal materials should not only state the name of the material, specifications, the number of pieces delivered, weight, etc., but also provide all the test results of the specified guarantee items.
D. Quality grade: According to the different requirements of steel surface quality, shape, and size promise deviation, the steel quality is divided into several grades, such as first-grade products and second-grade products. Sometimes different grades are set for a certain requirement, for example, surface quality can be divided into first grade, second grade, and third grade, for surface decarburization layer depth, can be divided into a group, two groups, etc., which indicates that the products are different in quality.
H. Delivery state: Delivery state refers to the ultimate plastic deformation processing or ultimate heat treatment state of the product delivery. Delivery without heat treatment is hot-rolled (forging) and cold-rolled states. Normalized, annealed, high-temperature tempering, tempering, and solution treatment is collectively referred to as heat treatment state delivery, or according to the heat treatment species are called normalized, annealed, high-temperature tempering, tempering, and other state delivery.
