ASTM A451/A451M-14 - 1.11.2014
 
1. Scope

1.1 This specification2 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.

 
2. Referenced Documents

A297/A297M-21a

Standard Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application (Includes all amendments and changes 9/17/2021).

B46.1

Surface Texture Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

E446-20(2026)

Standard Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness

E280-21(2026)

Standard Reference Radiographs for Heavy-Walled (412 to 12 in. (114 to 305 mm)) Steel Castings

E186-20(2026)

Standard Reference Radiographs for Heavy-Walled (2 to 412 in. (50.8 to 114 mm)) Steel Castings

E165-09

Standard Practice for Liquid Penetrant Examination for General Industry

E94-04

Standard Guide for Radiographic Examination

A999/A999M-23

Standard Specification for General Requirements for Alloy and Stainless Steel Pipe

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications