1.1 This specification covers a group of common requirements that are mandatory for steel castings produced by the investment casting process for pressure-containing parts under each of the following ASTM Specifications: Title of Specification ASTM Designation Steel Castings, Carbon, Suitable for Fusion Welding, A216/A216M for High-Temperature Service Steel Castings, Martensitic Stainless and Alloy, for A217/A217M Pressure-Containing Parts, Suitable for High- Temperature Service Castings, Austenitic, for Pressure-Containing A351/A351M Parts Steel Castings, Ferritic and Martensitic, for Pressure- A352/A352M Containing Parts, Suitable for Low-Temperature Service Steel Castings, Alloy, Specially Heat-Treated, for A389/A389M Pressure-Containing Parts, Suitable for High- Temperature Service Steel Castings Suitable for Pressure Service A487/A487M Castings, Iron-Nickel-Chromium and Nickel Alloys, Spe-      cially Controlled for Pressure-Retaining Parts for      Corrosive Service A990/A990M Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for      Pressure-Containing Parts A995/A995M 1.2 This specification also covers a group of supplementary requirements, which may be applied to the above specifications as indicated therein. These requirements are provided for use when additional testing or inspection is desired, and apply only when specified individually by the purchaser in the order. 1.3 When investment casting is ordered, the requirements of this specification shall take precedence over the individual material specification requirements. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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.