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ASTM B444-23

Current Revision

Standard Specification for Nickel-Chromium-Molybdenum-Niobium Alloys<brk/> and Nickel-Chromium-Molybdenum-Silicon Alloy Pipe and Tube

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1.1 This specification2 covers nickel-chromium-molybdenum-niobium alloys (UNS N06625 and UNS N06852) and nickel-chromium-molybdenum-silicon alloy (UNS N06219)3 in the form of cold-worked seamless pipe and tube. The general requirements for pipe and tube are covered by Specification B829.

1.2 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.

1.3 The following precautionary caveat pertains only to the test methods portion, Section 8, of this specification: 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.

1.4 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.


This specification covers UNS N06625 and UNS N06852 nickel-chromium-molybdenum-columbium alloys and UNS N06219 nickel-chromium-molybdenum-silicon alloy in the form of cold-worked seamless pipe and tube. UNS N06625 products are furnished in annealed Grade 1 and solution annealed Grade 2 while UNS N06219 and UNS N06852 are in solution annealed condition only. Chemical testing shall be performed on each type of material and shall conform to the chemical composition limits specified for carbon, manganese, silicon, phosphorus, sulfur, chromium, tantalum, columbium, cobalt, molybdenum, iron, aluminum, titanium, copper, and nickel. The material shall undergo tensile testing and shall conform to the required room temperature tensile properties like tensile strength, yield strength, and elongation depending on the heat treatment used and including small diameter and light-walled tubing. Each pipe or tube shall undergo hydrostatic testing and shall conform to the allowable fiber stress and also be examined with a nondestructive electric test as prescribed.


SDO ASTM: ASTM International
Document Number B444
Publication Date July 1, 2023
Language en - English
Page Count 5
Revision Level 23
Supercedes
Committee B02.07
Publish Date Document Id Type View
July 1, 2023 B0444-23 Revision
April 1, 2018 B0444-18 Revision
June 1, 2016 B0444-16E01 Revision
June 1, 2016 B0444-16 Revision
Dec. 1, 2006 B0444-06 Revision
Oct. 1, 2004 B0444-04 Revision
June 10, 2003 B0444-03 Revision
Aug. 10, 2000 B0444-00E01 Revision
May 1, 2011 B0444-06R11 Reaffirmation