自2007年9月起，本规范已被SAE航空航天材料部宣布“取消”，并被其取代，并已被AMS 2243取代。每当提及已取消的MAM 2243C时，应满足最新版AMS 2243的要求。通过这一行动，本文件将保留在航空航天材料规范索引的数字部分，表明其已被“取消”。本规范涵盖了适用于按公制尺寸订购的耐腐蚀和耐热钢制无缝管和焊接管的制造公差。 除非另有说明，否则这些公差适用于所有条件，并基于单个测量值。管道可仅通过两个尺寸（外径和壁厚、内径和壁厚或外径和内径）进行规定。

This specification has been declared "CANCELLED" and superseded by the Aerospace Materials Division, SAE, as of September, 2007, and has been superseded by AMS 2243. The requirements of the latest issue of AMS 2243 shall be fulfilled whenever reference is made to the cancelled MAM 2243C. By this action, this document will remain listed inthe Numerical Section of the Index of Aerospace Material Specifications indicating that it has been "CANCELLED".This specification covers manufacturing tolerances applicable to seamless and welded tubing of corrosion and heat resistant steel ordered to metric dimensions. These tolerances apply to all conditions and are based on individual measurements, unless otherwise noted. Tubing may be specified by two dimensions only (OD and wall thickness, ID and wall thickness, or OD and ID).