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See Chinese contents: Q/BQB 517-2023 Q/BQB 517-2023: Wire rods for cold heading
This Document specifies the size, shape, weight and tolerance, technical requirements, inspection and testing, packaging, marking and inspection documents of wire rods for cold heading. This Document applies to hot-rolled wire rods for cold heading produced by Baoshan Iron and Steel Co., Ltd. It is mainly used for manufacturing high-grade cold-formed fasteners, special-shaped parts, etc. used in the automotive, electronics, machinery and other industries.
