This standard is issued under the fixed designation A 182/A 182M/A 182M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon(e) indicates an editorial change since the last revision or reapproval.

This specification has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and Standards for the specific year of issue which has been adopted by the Department of Defense.

1.Scope

1.1 This specificatio2n covers forged low alloy and stain-less steel piping components for use in pressure systems.
Included are flanges, fittings, valves, and similar parts to specified dimensions or to dimensional standards such as the ANSI specifications that are referenced in Section 2.
1.2 For bars and products machined directly from bar, refer to Specifications A479/A 479M and A739 for the similar grades available in that specification.
1.3 Several grades of ferritic, martensitic, austenitic, and ferritic/austenitic steels are included in this specification. Selection will depend upon design and service requirements.
1.4 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
1.5 This specification is expressed in both inch-pound units and in SI units.
However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
1.6 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.