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Document Designation and Title Year Select Item(s) A1021/A1021M Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service 05 A1021 Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service 02 A1021 Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service 01