1.范围1。1本标准实施规程旨在补充ASTM的要求 标准规范A216/A216M、A217/A217M、A351/A351M、A352/A352M、A389/A389M、A487/A487M和A744/A744M，并提供一系列典型的参考照片，说明钢制压力铸件常见的各种表面不规则性，以及一般可接受和一般可拒收的质量。第5节的表1显示了MSS对本标准实施规程与比较器所示表面质量水平之间关系的解释，以及国际铸造技术协会（CTI）“钢铸件表面质量定义比较器”的相关照片。 1.2对于定义铸钢件质量的其他无损检测，本标准实施规程可由以下MSS标准实施规程补充:SP-53，“磁粉检测方法”；SP-54，“射线照相检查方法”；SP-93，“液体渗透检测方法”；SP-94，“超声波检测方法”；SP-112，“视觉和触觉方法”。

Please note: A laminated photo set is also available.  Please search forMSS SP-55for more information.1. SCOPE1.1 This Standard Practice is intended to supplement the requirements of ASTM Standard Specifications A216/A216M, A217/A217M, A351/A351M, A352/A352M, A389/A389M, A487/A487M, and A744/A744M, and to provide a series of reference photographs typical of the various surface irregularities common to steel pressure castings and illustrations of generally acceptable and generally rejectable quality. Table 1 of Section 5 is provided to show MSS interpretation as to the relationship between this Standard Practice and the levels of surface quality illustrated by the comparators and the associated photographs of the Castings Technology International (CTI), "Comparators for the Definition of Surface Quality of Steel Castings".1.2 For additional nondestructive examinations defining quality of steel castings, this Standard Practice may be supplemented by the following MSS Standard Practices: SP-53, "Magnetic Particle Examination Method"; SP-54, "Radiographic Examination Method"; SP-93, "Liquid Penetrant Examination Method"; SP-94, "Ultrasonic Examination Method"; and SP-112, "Visual and Tactile Method".