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See Chinese contents: Q/BQB 311-2023 Q/BQB 311-2023: Continuously hot-rolled high yield strength steel sheet and strip for cold forming
This document specifies the dimension, shape, technical requirements, inspection and testing, packaging, marking, and inspection documents for continuously hot-rolled high-yield strength steel sheets and strips for cold forming. This document applies to continuously hot-rolled high-yield strength steel strips for cold forming produced by Baoshan Iron and Steel Co., Ltd., as well as steel sheets cut transversely and steel strips slit longitudinally from it, hereafter referred to as steel sheets and steel strips.
