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See Chinese contents: GB/T 1591-2018 GB/T 1591-2018: High strength low alloy structural steels
This standard specifies the grade indication method, ordering content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of high strength low alloy structural steel. This standard is applicable to high strength low alloy structural steel plates, steel strips, steel sections, steel bars, etc. for general structural and engineering purposes. Its chemical composition is also applicable to steel billets.
