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See Chinese contents: GB/T 38938-2020 GB/T 38938-2020: High strength and low expansion alloy
This Standard specifies the order content, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certification of high strength and low expansion alloy. This Standard applies to high strength and low expansion alloy bars, flats and plates for high-load, high-precision loadbearing components.
