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See Chinese contents: GB/T 28909-2012 GB/T 28909-2012: Extra-high strength structural steel plates in the heat-treatment condition
This standard specifies the ordering content, designation indication method, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of extrahigh strength structural steel plates in the heat-treatment condition. This standard is applicable to steel plates with a thickness of not more than 50 mm for construction machinery such as mines, buildings and agriculture.
