1.1 本规范 2. 涵盖时效硬化不锈钢的棒材和型材。包括热加工或冷加工的圆形、方形、六边形、条形、角度、三通和通道；这些形状可以通过热轧、挤压或锻造生产。可根据本规范购买用于再成形的坯料或棒材。 1.2 这些钢通常用于在室温或高达600°F[315°C]的温度下需要耐腐蚀性和高强度的零件；632型为700°F[370°C]；UNS S46910型840°F[450°C]。它们适合在固溶退火条件下进行加工，之后可以时效硬化至第节中规定的机械性能 7. 没有开裂或变形的危险。XM型- 25可在收到的完全热处理状态下加工。UNS S46910型适用于固溶退火、冷加工和时效硬化条件下的加工。 1.3 631和632型钢的微观结构中含有大量铁素体，在锻件和较大直径的棒材中可能具有较低的延展性。应用应限于小直径钢筋。 1.4 以英寸-磅单位或国际单位制（公制）表示的数值应单独视为标准；在文本和表格中，[括号]中显示了国际单位制。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。合并两个系统的值可能会导致不符合规范。 1.5 除非订单指定“M”名称，否则材料应以英寸-磅为单位提供。 注1: 锻件见规范 A705/A705M . 注2: 锻造用坯料和棒材见规范 A314飞机 . 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification 2 covers bars and shapes of age-hardening stainless steels. Hot-finished or cold-finished rounds, squares, hexagons, bar shapes, angles, tees, and channels are included; these shapes may be produced by hot rolling, extruding, or forging. Billets or bars for reforging may be purchased to this specification. 1.2 These steels are generally used for parts requiring corrosion resistance and high strength at room temperature, or at temperatures up to 600 °F [315 °C]; 700 °F [370 °C] for Type 632; 840 °F [450 °C] for Type UNS S46910. They are suitable for machining in the solution-annealed condition after which they may be age-hardened to the mechanical properties specified in Section 7 without danger of cracking or distortion. Type XM-25 is machinable in the as-received fully heat treated condition. Type UNS S46910 is suitable for machining in the solution-annealed, cold-worked, and aged-hardened condition. 1.3 Types 631 and 632 contain a large amount of ferrite in the microstructure and can have low ductility in forgings and larger diameter bars. Applications should be limited to small diameter bar. 1.4 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standards; within the text and tables, the SI units are shown in [brackets]. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification. 1.5 Unless the order specifies an “M” designation, the material shall be furnished to inch-pound units. Note 1: For forgings, see Specification A705/A705M . Note 2: For billets and bars for forging see Specification A314 . 1.6 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.