ASTM_A_789_-_A_789M_-_17.pdf

Designation:A789/A789M17Standard Specification forSeamless and Welded Ferritic/Austenitic Stainless SteelTubing for General Service1This standard is issued under the fixed designation A789/A789M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification2covers grades of average wallthickness,or,if specified on the order,minimum wallthickness,of stainless steel tubing for services requiringgeneral corrosion resistance,with particular emphasis onresistance to stress corrosion cracking.These steels are suscep-tible to embrittlement if used for prolonged periods at elevatedtemperatures.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.Within the text,the SI units are shown inbrackets.The inch-pound units shall apply unless the Mdesignation of this specification is specified in the order.2.Referenced Documents2.1 ASTM Standards:3A480/A480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet,and StripA1016/A1016M Specification for General Requirements forFerritic Alloy Steel,Austenitic Alloy Steel,and StainlessSteel TubesE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 SAE Standard:4SAE J 1086 Practice for Numbering Metals and Alloys(UNS)3.Ordering Information3.1 Orders for product under this specification should in-clude the following,as required,to describe the desiredmaterial adequately:3.1.1 Quantity(feet,metres,or number of lengths),3.1.2 Name of product(seamless or welded tubes),3.1.3 Grade(see Table 1),3.1.4 Size(outside diameter and average wall thickness,unless minimum wall thickness is specified),3.1.5 Length(specific or random),3.1.6 Optional requirements(for product analysis,see Sec-tion 8;for hydrostatic or nondestructive electric test,seeSection 10),3.1.7 Test report required(see the Inspection section ofSpecification A1016/A1016M),3.1.8 Specification designation,and3.1.9 Special requirements.4.General Requirements4.1 Product furnished under this specification shall conformto the applicable requirements of Specification A1016/A1016M,unless otherwise provided herein.5.Manufacture5.1 The tubes shall be made by the seamless or weldedprocess with no filler metal added.6.Heat Treatment6.1 All tubes shall be furnished in the heat-treated conditionin accordance with the procedures shown in Table 2.Forseamless tubes,as an alternate to final heat treatment in acontinuous furnace or batch-type furnace,immediately follow-ing hot forming while the temperature of the tubes is not lessthan the specified minimum solution treatment temperature,tubes may be individually quenched in water or rapidly cooledby other means.7.Chemical Composition7.1 The steel shall conform to the chemical requirementsprescribed in Table 1.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved March 15,2017.Published March 2017.Originallyapproved in 1981.Last previous edition approved in 2016 as A789/A789M 16a.DOI:10.1520/A0789_A0789M-17.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-cation SA789 in Section II of that Code.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 8.Product Analysis8.1 An analysis of either one billet or one length offlat-rolled stock or one tube shall be made from each heat.Thechemical composition thus determined shall conform to therequirements specified.8.2 A product analysis tolerance(see the annex table onChemical Requirements(Product Analysis Tolerances)inSpecification A480/A480M)shall apply.The product analysistolerance is not a