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,		A 216/A 216M
	for High-Temperature Service
Steel Castings, Martensitic Stainless and Alloy, for		A 217/A 217M
	Pressure-Containing Parts, Suitable for High-
	Temperature Service
Castings, Austenitic, Austenitic-Ferritic (Duplex),		A 351/A 351M
	for Pressure-Containing Parts
Steel Castings, Ferritic and Martensitic, for Pressure-		A 352/A 352M
	Containing Parts, Suitable for Low-Temperature
	Service
Steel Castings, Alloy, Specially Heat-Treated, for		A 389/A 389M
	Pressure-Containing Parts, Suitable for High-
	Temperature Service
Steel Castings Suitable for Pressure Service		A 487/A 487M

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 non-conformance 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 and health practices and determine the applicability of regulatory limitations prior to use.