1、Designation: A 822/A 822M 04Standard Specification forSeamless Cold-Drawn Carbon Steel Tubing for HydraulicSystem Service1This standard is issued under the fixed designation A 822/A 822M; the number immediately following the designation indicates the yearof original adoption or, in the case of revis
2、ion, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers nominal wall thickness, seam-less, cold-drawn carbon steel tubing intende
3、d 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 are18 to 3 in. 3.2 to 88.9 mm in outsidediameter and 0.035 to 0.134 in. 0.9 to 3.4 mm inclusive, in
4、nominal 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 than18 in. 3.2 mm in inside diameter or 0.015in. 0.4 mm in thickness.1.4 Optional
5、supplementary requirements are provided and,when desired, shall be so stated in the order.1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalen
6、ts; therefore, each system shallbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A 450/A 450M Specification for General Requirements forCarbon, Ferritic Alloy, and Austenitic Alloy Steel
7、 TubesA 751 Test Methods, Practices, and Terminology forChemical 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 th
8、ickness 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 in
9、clude 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
10、(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 wall thick-ness),4.1.5 Length (specific or random),4.1.6 Test report required (see Certified Test Report sectionin Specification A 450/A 450M),4.
11、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 A 450, unless otherwise provided herein.6. Manufacture6.1 Tubes shall be made by the
12、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 1200F 650C.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct
13、responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved March 1, 2004. Published March 2004. Originallyapproved in 1984. Last previous edition approved in 2000 as A 82290 (2000).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact AST
14、M Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consho
15、hocken, PA 19428-2959, United States.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 ten-sile properties prescribed in Table 2.9.2 Hardness RequirementsFinished
16、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 pa
17、rallel 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
18、not exceed the values given in Table 3.10.2 Permissible variations in the wall thickness of thetubing shall not exceed 610 % for tubing having 0.50 in. 12.7mm or larger nominal outside diameter or more than 615 %for tubing having a smaller nominal outside diameter.11. Workmanship, Finish, and Appear
19、ance11.1 Finished tubes shall be free of scale but may have asuperficial oxide film on the surfaces.11.2 Finished tubes shall be reasonably straight and havesmooth ends free of burrs. Tubes shall have a workmanlikefinish and shall be free of surface imperfections that cannot beremoved within the all
20、owable wall tolerances. Removal ofsurface imperfections, such as handling marks, straighteningmarks, light mandrel and die marks, shallow pits, and scalepattern, will not be required provided they are within theallowable tolerances.11.3 Finished tubes shall be protected both on the outsideand the in
21、side diameter to prevent corrosion in transit. If acorrosion preventive compound is applied, it shall be such thatafter normal storage periods it can be readily removed bycleaning.12. Number of Tests12.1 One tension test, flaring test, flattening test, and hard-ness test shall be made on each lot of
22、 tubes.13. Hydrostatic Proof Test13.1 Tubing supplied under this specification shall havebeen tested hydrostatically, with no evidence of failure orpermanent deformation, at a pressure that will subject thematerial to a hoop stress of 20 000 psi 140 MPa. Testpressures shall be determined as follows:
23、P 52TSDwhere:D = outside diameter of tubing, in. mm,P = hydrostatic pressure, psi MPa,S = allowable stress = 20 000 psi 140 MPa, andT = minimum wall thickness of tubing, in. mm.13.2 No tube shall be tested beyond a hydrostatic pressureof 5000 psi 35 MPa, unless so specified on the purchaseorder.14.
24、Packaging and Package Marking14.1 Tubing shall be packaged or bundled in such a manneras to prevent damage in ordinary handling and transportation.14.2 Tubing shall be identified by a tag with the name of themanufacturer, purchase order number, specification designa-tion, and size.15. Keywords15.1 c
25、arbon; pressure-containing parts; seamless steel tube;steel tubeTABLE 1 Chemical RequirementsElement Composition, %Carbon 0.18 maxManganese 0.27 to 0.63Phosphorus 0.048 maxSulfur 0.058 maxTABLE 2 Tensile RequirementsTensile strength, min., ksi MPa 45 310Yield strength, min., ksi MPa 25 170Elongation
26、, in 2 in. or 50 mm, min., % 35TABLE 3 Tubing Outside Diameter TolerancesNominal Tubing Outside Diameter,Ain. mmOutside Diameter Tolerance,in. mmUp to 1 25 60.004 0.101to112 25 to 38 60.006 0.15Over 112 to 2 38 to 50, inclusive 60.008 0.20Over2to312 50 to 90, inclusive 60.010 0.25AThe actual outside
27、 diameter shall be the average of the maximum andminimum outside diameters as determined at any one cross-section through thetubing.A 822/A 822M 042SUPPLEMENTARY REQUIREMENTSThe following supplementary requirement may become a part of the specification when specified inthe inquiry or invitation to b
28、id, and purchase order or contract. These requirements shall not beconsidered, unless specified in the order, in which event the necessary tests shall be made by themanufacturer prior to shipment of the tubing.S1. Product AnalysisS1.1 Product analysis shall be made by the supplier fromone tube per h
29、eat of steel. If the original test for productanalysis fails, retests of two additional lengths of tubes shall bemade. Both retests shall meet the requirements of this specifi-cation for the elements in question; otherwise, all remainingmaterial in the heat shall be rejected or, at the option of the
30、producer, each length of tube may be individually tested foracceptance. Lengths of tubes which do not meet the require-ments of this specification shall be rejected.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A 82290 (2000) th
31、at may impact the use of this standard.(1) Revised standard text and tables to include rationalized SIunits and create a combined standard.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this s
32、tandard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years
33、andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee
34、, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 822/A 822M 043
