1.1 This specification covers austenitic alloy steel pipe for use in high-temperature, corrosive, or nuclear pressure service.

1.2 Several grades of austenitic stainless steel are covered as indicated in Table 1.

(A) Where ellipses (...) appear in this table there is no requirement, and the element need not be analyzed or reported.
(B) Grades CPF10MC and CPF8C may have a columbium plus tantalum content maximum of 1.35 %.
(C) No designation as yet assigned by ASTM International or Steel Founders' Society of America.
(D) By agreement between the manufacturer and the purchaser, the carbon content of Grade CPH20 may be restricted to 0.10 % max. When so agreed, the grade designation shall be CPH10.
1.3 Optional supplementary requirements are provided when additional testing may be required.

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.

NOTE 1: This specification is not intended to cover centrifugal pipe made from alloys containing more than 0.20 % carbon, such as are covered by Specification A297/A297M.

1.4.1 Within the text, the SI units are shown in brackets.

ASTM Standards

A297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E94 Guide for Radiographic Examination
E165 Practice for Liquid Penetrant Examination for General Industry
E186 Reference Radiographs for Heavy-Walled (2 to 412-in. (50.8 to 114-mm)) Steel Castings
E280 Reference Radiographs for Heavy-Walled (412 to 12-in. (114 to 305-mm)) Steel Castings
E446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness

ANSI Standard

B46.1 Surface Texture