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See Chinese contents: GB/T 38960-2020 GB/T 38960-2020: Cryogenic-resistant controlled expansion alloys
This Standard specifies the order content, classification and code, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of cryogenic-resistant iron-nickelcobalt-based controlled expansion alloys. This Standard applies to iron-nickel-cobalt-based controlled expansion alloy 4J329D bars, flats, foils, strips, wires, pipes that are matched or sealed with semiconductors, hard glass, etc. in the field of space optoelectronics, semiconductor industry and other harsh deep-low temperature applications.
