1.1 本规范涵盖了通过雾化预合金粉末或铁粉热致密制造的粉末锻造铁材料，并拟用作结构零件。 1.2 本规范涵盖由以下材料制成的粉末锻造零件: 1.2.1 成分: 1.2.1.1 PF-10XX碳钢（由雾化铁粉和石墨粉制成）， 1.2.1.2 PF-10CXX铜碳钢（由雾化铁粉、铜粉和石墨粉制成）， 1.2.1.3 PF-11XX碳钢，含硫化锰，可提高机械加工性能（由雾化铁粉、硫化锰和石墨粉制成）， 1.2.1.4 PF-11CXX、PF-1130CXX和PF-1135CXX铜碳钢，含硫化锰，用于增强机械加工性能（由雾化铁粉、铜、硫化锰和石墨粉制成）， 1.2.1.5 PF-42XX镍钼钢（由预合金雾化铁镍钼粉和石墨粉制成）， 1.2.1.6 PF-46XX镍钼钢（由预合金雾化铁镍钼粉和石墨粉制成）， 1.2.1.7 PF-44XX钼钢（由预合金雾化铁钼粉和石墨粉制成），以及 1.2.1.8 PF-49XX钼钢（由预合金雾化铁钼粉和石墨粉制成）。 注1: 合金成分名称是对AISI-SAE术语的修改。例如:10CXX表示一种含有铜和XX量碳的普通碳钢。合金和杂质元素的成分极限可能不同于AISI-SAE极限。化学成分限值在第节中规定 6. . 注2: XX表示买方为应用规定的锻造碳含量，单位为百分之一百。对于给定的规定碳含量，允许极限应符合 6.2 . 注3: 在整个文件中，粉末锻造P/F的旧首字母缩略词已由PF取代。材料名称前缀的更改只是为了与当前批准的粉末锻造首字母缩写匹配。各种粉末锻造材料的材料规格和性能特征没有变化。 1.2.2 分数: 1.2.2.1 A级- 密度等于最大值0.5 % 多孔性。适用零件图纸指定的粉末锻造零件截面的最小密度不得小于 表1 . 1.2.2.2 B级- 密度等于最大值1.5 % 多孔性。适用零件图纸指定的粉末锻造零件截面的最小密度不得小于 表1 . 1.3 单位- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.4 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 covers powder forged ferrous materials fabricated by hot densification of atomized prealloyed or iron powders and intended for use as structural parts. 1.2 This specification covers powder forged parts made from the following materials: 1.2.1 Compositions: 1.2.1.1 PF-10XX Carbon Steel (produced from atomized iron powder and graphite powder), 1.2.1.2 PF-10CXX Copper-Carbon Steel (produced from atomized iron powder, copper and graphite powders), 1.2.1.3 PF-11XX Carbon Steel with manganese sulfide for enhanced machinability (produced from atomized iron powder, manganese sulfide, and graphite powders), 1.2.1.4 PF-11CXX, PF-1130CXX, and PF-1135CXX Copper-Carbon Steels with manganese sulfide for enhanced machinability (produced from atomized iron powder, copper, manganese sulfide, and graphite powders), 1.2.1.5 PF-42XX Nickel-Molybdenum Steel (produced from prealloyed atomized iron-nickel-molybdenum powder and graphite powder), 1.2.1.6 PF-46XX Nickel-Molybdenum Steel (produced from prealloyed atomized iron-nickel-molybdenum powder and graphite powder), 1.2.1.7 PF-44XX Molybdenum Steel (produced from prealloyed atomized iron-molybdenum powder and graphite powder), and 1.2.1.8 PF-49XX Molybdenum Steel (produced from prealloyed atomized iron-molybdenum powder and graphite powder). Note 1: Alloy composition designations are modifications of the AISI-SAE nomenclature. For example: 10CXX designates a plain carbon steel containing copper and XX amount of carbon. Compositional limits of alloy and impurity elements may be different from the AISI-SAE limits. Chemical composition limits are specified in Section 6 . Note 2: XX designates the forged carbon content, in hundredths of a percent, that is specified by the purchaser for the application. For a given specified carbon content, the permissible limits shall be as specified in 6.2 . Note 3: The old acronym for powder forging P/F has been replaced by PF throughout the document. The change in the prefix for the material designations is just to match the currently approved acronym for powder forging. No change has been made to the material specification and performance characteristics for the various powder forged materials. 1.2.2 Grades: 1.2.2.1 Grade A— Density equivalent to a maximum of 0.5 % porosity. The minimum density of those sections of the powder forged part so designated by the applicable part drawing shall not be less than the value specified in Table 1 . 1.2.2.2 Grade B— Density equivalent to a maximum of 1.5 % porosity. The minimum density of those sections of the powder forged part so designated by the applicable part drawing shall not be less than the value specified in Table 1 . 1.3 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.4 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.