ASTM B468-04 pdf free.Standard Specification for Welded UNS N08020, N08024, and N08026 Alloy Tubes.
This specification covers welded UNS N08020,NO8024,and N08026 alloy boiler，heat exchanger，and con-denser tubes for general corrosion-resisting and low-or hightemperature service.This specification covers tubes 1/s to 5 in. (3.18 to 127mm), inclusive, in outside diameter and 0.015 to 0.500 in. (0.38to 12.70 mm), inclusive, in wall thickness.Table 2 of Speci-fication B 751 lists the dimensional requirements of these sizes.Tubes having other dimensions may be furnished providedsuch tubing complies with all other requirements of thisspecification.The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only. This standard does not purport to address all of thesafety concerns，if any,associated with its use. lt is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet for this product/material as pro-vided by the manufacturer; to establish appropriate safety andhealth practices, and determine the applicability of regulatorylimitations prior to use.Referenced Documents2.1 ASTM Standards: A 262 Practices for Detecting Susceptibility to Intergranu-lar Attack in Austenitic Stainless Steels.B751 Specification for General Requirements for Nickeland Nickel-Alloy Welded Tube.B 899Terminology Relating to Non-ferrous Metals andAlloys.Definitions for terms defined in Terminology B 899shall apply unless otherwise defined by the requirements of thisdocument.Material furnished in accordance with this specificationshall conform to the applicable requirements of the currentedition of Specification B751 unless otherwise providedherein.
The tubing shall be made from flatrolled stock by anautomatic welding process with no addition of filler metal.Subsequent to welding and prior to final heat treatment,thematerial shall be coldworked in either the weld metal only, orin both the weld and base metal.
Tubing of UNS N08020 alloy shall befurnished in the stabilized-annealed condition. Tubing of UNSN08024 alloy shall be furnished in the annealed condition.Tubing of UNS N08026 alloy shall be furnished in thesolution-annealed condition.ASTM B468 pdf download.