This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Designation: A693 - 24 WTER Standard Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip1 This standard is issued under the fixed designation A693; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the yearoflast revision. Anumber in parentheses indicates the year oflast reapproval.A superscript epsilon (s) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U.S. Department of Defense. 1. Scope* E527 Practice for Numbering Metals and Alloys in the 1.1 This specification?coversprecipitation-hardening stain- Unified Numbering System (UNS) less steel plate, sheet, and strip. The mechanical properties of 2.2 SAE Standard: these steels are developed by suitable low-temperature heat SAE J 1086 Recommended Practice for Numbering Metals treatments generally referred to as precipitation hardening. and Alloys (UNS)4 1.2 These steels are used for parts requiring corrosion resistance and high strength at room temperature or at tem- 3. General Requirements peratures up to 600 °F (315 °C). Some of these steels are 3.1 The following requirements for orders for material particularly suitable for moderate to severe drawing and furnished under this specification shall conform to the appli- forming in the solution-treated condition.Others are capable of cable requirements of the current edition of Specification mildformingonly.They aresuitableformachininginthe A480/A480M or as specified in the following: solution-annealed condition, after which they may be hardened 3.1.1 Ordering Information: to the mechanical properties specified in this standard without 3.1.1.1 In addition to the requirements of Specification danger of cracking or distortion A480/A480M, the heat treatment (see Section 6) shall be 1.3 The values stated in inch-pound units are to be regarded specified on thepurchase orderif other than the solution- as the standard. annealed condition is being ordered. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- 4. Materials and Manufacture ization established in the Decision on Principles for the 4.1 The steel shall be melted by one of the following Development of International Standards, Guides and Recom- processes: mendations issued by the World Trade Organization Technical 4.1.1 Electric furnace (with separate degassing and refining Barriers to Trade (TBT) Committee. optional), 4.1.2Vacuumfurnace,and 2. Referenced Documents 4.1.3 One of the former followed by: 2.1 ASTM Standards:3 4.1.3.1 Consumable remelting in vacuum, inert gas, or A480/A480M Specification for General Requirements for electroslag,or Flat-Rolled Stainless and Heat-Resisting Steel Plate, 4.1.3.2 Electron beam refining. Sheet, and Strip 4.1.4 Other commercial melting methods as agreed upon between purchaser and seller are acceptable. 1 This specification is under the jurisdiction of ASTM Committee AO1 on Steel, 5. Chemical Composition Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.17 on Flat-Rolled and Wrought Stainless Steel 5.1 The steel shall conform to the requirements as to Current edition approved May 1, 2024. Published May 2024. Originally chemical composition specified in Table 1, and shall conform approved in 1974. Last previous edition approved in 2022 as A693 - 22. DOI: toapplicablerequirements specifiedinthecurrent editionof 10.1520/A0693-24. 2 For ASME Boiler and Pressure Vessel Code applications see related Specifi- Specification A480/A480M. cat