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Cold-rolled thin steel sheets and strips for deep drawing (GB/T2513-1985)
Cold-rolled thin steel sheets and strips for deep drawing are one of the core products used in the forming of automobile parts, and is a kind of steel material that is subjected to cold rolling and further cold forming processes to reduce material thickness and increase surface brightness. It has high dimensional accuracy and good burr performance, which is widely used in the production of automobile body works, fenders, and motor fuel tanks.
GB/T2513-1985 is the national standard of People’s Republic of China that regulates requirements, technical delivery conditions, test methods, and inspections for cold-rolled thin steel sheets and strips for deep drawing. The scope of this standard covers the cold-rolled thin steel sheets and strips for deep drawing with a nominal thickness not less than 0.4mm, namely TS360LA, TS410LA, TS460LA, TS500LA, and TS550LA.
These cold-rolled thin steel sheets and strips for deep drawing manufactured using the national standard must meet the requirements of various mechanical properties and the size of the test piece. The mechanical properties include yield strength, tensile strength, elongation, and r-value, which must comply with the surface quality requirements of the national standard. The required test pieces include longitudinal, transverse, and sample pieces, which should be provided along with the record of delivered products.
Furthermore, GB/T2513-1985 regulations also specify the inspection methods for cold-rolled thin steel sheets and strips for deep drawing. The inspection consists of a visual inspection and a mechanical test. In terms of visual inspection, the surface of the products should be free of scratches, ripples, and visible defects such as cracks. The mechanical test involves the testing of the products in accordance with the requirements of their mechanical properties.
In conclusion, cold-rolled thin steel sheets and strips for deep drawing are highly accurate materials used in the production of automobile parts. GB/T2513-1985 has been established as the national standard that defines the requirements and inspection methods for the product in terms of its mechanical properties, surface quality, and size of the test piece. Adhering to the guidelines of this national standard, manufacturers can accurately produce higher quality products for better vehicle performance and safety.
