ASTM_A_822_-_A_822M_-_04_2015.pdf

Designation:A822/A822M04(Reapproved 2015)Standard Specification forSeamless Cold-Drawn Carbon Steel Tubing for HydraulicSystem Service1This standard is issued under the fixed designation A822/A822M;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.Scope1.1 This specification covers nominal wall thickness,seamless,cold-drawn carbon steel tubing intended for use inhydraulic systems and in other similar applications whereforming operations require tight radius bending and flaring.1.2 Tubing sizes and thicknesses usually furnished to thisspecification are18to 312in.3.2 to 88.9 mm in outsidediameter and 0.035 to 0.134 in.0.9 to 3.4 mm inclusive,innominal wall thickness.Tubing having other dimensions maybe furnished,provided such tubing complies with all otherrequirements of this specification.1.3 Mechanical property requirements do not apply totubing smaller than18in.3.2 mm in inside diameter or 0.015in.0.4 mm in thickness.1.4 Optional supplementary requirements are provided and,when desired,shall be so stated in the order.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem may not be exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the two systems may result in non-conformance with thestandard.2.Referenced Documents2.1 ASTM Standards:2A450/A450M Specification for General Requirements forCarbon and Low Alloy Steel TubesA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel Products3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lotfor tension and hardness test requirementstheterm“lot”applies to all tubes,prior to cutting,of the samenominal diameter and wall thickness which are produced fromthe same heat of steel.When final heat treatment is in abatch-type furnace,a lot shall include only those tubes of thesame size and the same heat which are heat treated in the samefurnace charge.When the final heat treatment is in a continuousfurnace,a lot shall include all tubes of the same size and heat,heat treated in the same furnace at the same temperature,timeat heat,and furnace speed.4.Ordering Information4.1 Orders for material to this specification should includethe following,as required,to describe the desired materialadequately:4.1.1 Quantity(feet,metres,or number of lengths),4.1.2 Name of material(seamless tubing),4.1.3 Manufacture(cold-drawn),4.1.4 Tube size(outside diameter and nominal wallthickness),4.1.5 Length(specific or random),4.1.6 Test report required(see Certified Test Report sectionin Specification A450/A450M),4.1.7 Specification designation,and4.1.8 End use of material.5.General Requirements5.1 Material furnished under this specification shall con-form to the applicable requirements of the latest edition ofSpecification A450/A450M,unless otherwise provided herein.6.Manufacture6.1 Tubes shall be made by the seamless process and shallbe cold drawn to size.7.Heat Treatment7.1 Tubes shall be heated after the final cold workingoperation to a temperature of at least 1200 F 650 C.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Sept.1,2015.Published September 2015.Originallyapproved in 1984.Last previous edition approved in 2010 as A822/A822M04(2010).DOI:10.1520/A0822_A0822M-04R15.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.Chemical Composition8.1 Steel shall conform to the chemical composition re-quirements prescribed in Table 1.9.Mechanical Properties9.1 Tensile PropertiesMaterial shall conform to the tensileproperties prescribed in Table 2.9.2 Hardness RequirementsFinished tubes shall have ahardness not exceeding 65 HRB.The hardness test shall not berequired on tubing having a nominal wall thickness of less than0.065 in.1.7 mm.9.3 Flattening TestA section of finished tubing,not lessthan 3 in.75 mm in length shall not crack or exhibit flawswhen flattened between parallel plates to a distance equal tothree times the tubing nominal wall thickness.Superficialruptures resulting from minor surface imperfections shall notbe considered cause for rejection.10.Permissible Variations in Dimensions10.1 Permissible variations in the outside diameter of thetubing shall not exceed the val