ASTM-B468 › Historical Revision Information
Standard Specification for Welded UNS N08020, N08024, and N08026 Alloy Tubes
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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.
Scope
1.1 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.
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 B 751
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.
Keywords
welded tube; N08020; N08024; N08026; Carpenter alloy--specifications; Chromium-nickel-iron-molybdenum-copper alloy--pipe/tube; Condenser and heat exchanger systems--nickel alloy; Corrosive service applications--tube (Ni/Ni alloys); High-temperature service applications--nickel (specifications); Nickel alloy tube--specifications; Nickel-iron alloy--specifications; Nickel-iron-chromium alloys--specifications; Potassium iodide method; UNS N08020 (Ni-Fe-Cr alloy, Carpenter 20Cb3); UNS N08024 (Cr-Ni-Fe-Mo-Cu alloy, columbium stabilized); UNS N08026 (Ni-Cr wrought alloy, Carpenter 20Mo6); Welded Ni/Ni alloy tube--specifications; ICS Number Code 77.150.30 (Copper products)
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Document Number
ASTM-B468-04(2009)
Revision Level
2004 R09 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
Oct. 1, 2009
Document Type
Specification
Page Count
2 pages
Committee Number
B02.07