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

1.2The 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 contain a minimal amount of ferrite. See Supplementary Requirement S5.

1.3Optional Supplementary Requirements S1 to S11 are provided; these call for additional tests to be made if desired.

1.4The 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.

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