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This specification covers welded UNS N08020, N08024, and N08026 alloy boiler, heat exchanger, and condenser tubes for general corrosion-resisting and low- or high-temperature service. Tubing shall be made from flat-rolled stock by an automatic welding process with no addition of filler metal. Subsequent to welding and prior to final heat treatment, the material shall be cold-worked in either the wed metal only, or in both the weld and base metal. Tubing of UNS N0820 alloy shall be furnished in the stabilized-annealed condition, Tubing of UNS N0824 alloy shall be furnished in the annealed condition. Tubing of UNS N0826 alloy shall be furnished in the solution-annealed condition. The material shall conform to the composition limits specified. The material shall conform to the mechanical property requirements for tensile strength, yield strength and elongation. Flattening and flange tests shall be made on each end of one tube per lot.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
1.1 This specification covers welded UNS N08020 alloy boiler, heat exchanger, and condenser tubes for general corrosion-resisting and low- or high-temperature service.
1.2 This specification covers tubes 1/8 to 5 in. (3.18 to 127 mm), inclusive, in outside diameter and 0.015 to 0.500 in. (0.38 to 12.70 mm), inclusive, in wall thickness. Table 2 of Specification B751 lists the dimensional requirements of these sizes. Tubes having other dimensions may be furnished provided such tubing complies with all other requirements of this specification.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
B751 Specification for General Requirements for Nickel and Nickel Alloy Welded Tube
B899 Terminology Relating to Non-ferrous Metals and Alloys