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See Chinese contents: GB/T 39077-2020 GB/T 39077-2020: Test methods for detecting detrimental phases in lean duplex austenitic-ferritic stainless steels
This standard specifies the test methods for detecting detrimental phase in three types of lean duplex austenitic-ferritic stainless steels, namely the microstructure testing method, the Charpy impact test method, the ferric chloride corrosion test method.
