1.1 This specification covers iron-chromium-nickel, high-alloy tubes made by the centrifugal casting process intended for use under pressure at high temperatures.

1.2 The grades of high alloys detailed in Table 1 are intended for applications requiring strength and resistance to corrosion and scaling at high temperatures.

(A) Where ellipses (...) appear in this table there is no requirement, and the element need not be analyzed or reported.
(B) Manufacturing control should ensure that this composition contains a minimal amount of ferrite. See Supplementary Requirement S5.
1.3 Optional Supplementary Requirements S1 to S11 are provided; these call for additional tests to be made if desired.

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.

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

1.5 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.

ASTM Standards

A342/A342M Test Methods for Permeability of Weakly Magnetic Materials
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E8/E8M Test Methods for Tension Testing of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
E94/E94M Guide for Radiographic Examination Using Industrial Radiographic Film
E139 Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
E142 Method for Controlling Quality of Radiographic Testing
E151 Recommended Practice for Tension Tests of Metallic Materials at Elevated Temperatures with Rapid Heating and Conventional or Rapid Strain Rates
E165/E165M Practice for Liquid Penetrant Examination for General Industry
E340 Practice for Macroetching Metals and Alloys