本规范涵盖了两个等级的优质飞机钢，即棒材、线材、固溶热处理条件下的锻件和锻件坯料形式的耐腐蚀钢。本规范所涵盖的产品仅限于标称6.00英寸（152.4毫米），且平行侧面（厚度）之间的直径或最大横截面尺寸以下，除非产品在H1000条件下进行测试（见3.5.1.2和8.7）。当产品在H11000条件下进行测试时，该产品被限制为8.00英寸（203.2毫米）并且小于平行侧面之间的直径或最大横截面尺寸（厚度）。锻造坯料可以是任何尺寸。

This specification covers two grades of a premium aircraft-quality, corrosion-resistant steel in the form of bars, wire, forgings in the solution heat treated condition, and forging stock. Product covered by this specification is limited to a nominal 6.00 inches (152.4 millimeters) and under diameter or maximum cross-sectional dimension between parallel sides (thickness), unless the product is tested in the response to H1000 condition (see3.5.1.2and8.7). When product is tested in the H1000 condition, the product is limited to 8.00 inches (203.2 millimeters) and under diameter or maximum cross-sectional dimension between parallel sides (thickness). Stock for forging may be of any size.