ASTM A618 A618M-2004(2010) Standard Specification for Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing《热成型焊接和无缝高强度低合金结构钢管标准规范》.pdf
《ASTM A618 A618M-2004(2010) Standard Specification for Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing《热成型焊接和无缝高强度低合金结构钢管标准规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM A618 A618M-2004(2010) Standard Specification for Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing《热成型焊接和无缝高强度低合金结构钢管标准规范》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A618/A618M 04 (Reapproved 2010)Standard Specification forHot-Formed Welded and Seamless High-Strength Low-AlloyStructural Tubing1This standard is issued under the fixed designation A618/A618M; the number immediately following the designation indicates the yearof original adoption or, in
2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 Th
3、is specification covers grades of hot-formed weldedand seamless high-strength low-alloy square, rectangular,round, or special shape structural tubing for welded, riveted, orbolted construction of bridges and buildings and for generalstructural purposes. When the steel is used in welded construc-tion
4、, the welding procedure shall be suitable for the steel andthe intended service.1.2 Grade II has atmospheric corrosion resistance equiva-lent to that of carbon steel with copper (0.20 minimum Cu)Grades Ia and Ib have atmospheric corrosion resistance sub-stantially better than that of Grade II (Note
5、1). When properlyexposed to the atmosphere, Grades Ia and Ib can be used bare(unpainted) for many applications. When enhanced corrosionresistance is desired, Grade III, copper limits may be specified.NOTE 1For methods of estimating the atmospheric corrosion resis-tance of low alloy steels see Guide
6、G101 or actual data.1.3 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.
7、 Combining valuesfrom the two systems may result in non-conformance with thestandard.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentA751 Tes
8、t Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsG101 Guide for Estimating the Atmospheric CorrosionResistance of Low-Alloy Steels3. Ordering Information3.1 Orders for material under this specification shouldinclude the following as required to describe the materialadequ
9、ately:3.1.1 Quantity (feet, metres, or number of lengths),3.1.2 Grade (Table 1 and Table 2),3.1.3 Material (round, square, or rectangular tubing),3.1.4 Method of manufacture (seamless, buttwelded, orhot-stretch-reduced electric-resistance welded),3.1.5 Size (outside diameter and nominal wall thickne
10、ss forround tubing and the outside dimensions and calculated nomi-nal wall thickness for square and rectangular tubing),3.1.6 Length (specific or random, see 8.2),3.1.7 End condition (see 9.2),3.1.8 Burr removal (see 9.2),3.1.9 Certification (see 12.1),3.1.10 Specification designation (A618 or A618M
11、, includ-ing yeardate),3.1.11 End use, and3.1.12 Special requirements.4. Process4.1 The steel shall be made by one or more of the followingprocesses: open-hearth, basic-oxygen, or electric-furnace.4.2 Steel may be cast in ingots or may be strand cast. Whensteels of different grades are sequentially
12、strand cast, identifi-cation of the resultant transition material is required. Theproducer shall remove the transition material by any estab-lished procedure that positively separates the grades.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related
13、Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved April 1, 2010. Published August 2010. Originallyapproved in 1968. Last previous edition approved in 2004 as A618/A618M04.DOI: 10.1520/A0618_A0618M-04R10.2For referenced ASTM standa
14、rds, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
15、 19428-2959, United States.5. Manufacture5.1 The tubing shall be made by the seamless, furnace-buttwelded (continuous-welded), or hot-stretch-reducedelectric-resistance-welded process.6. Chemical Composition6.1 When subjected to the heat and product analysis, respec-tively, the steel shall conform t
16、o the requirements prescribed inTable 1.6.1.1 For Grades Ia and Ib, the choice and use of alloyingelements, combined with carbon, manganese, and sulfur withinthe limits prescribed in Table 1 to give the mechanicalproperties prescribed in Table 2 and to provide the atmosphericcorrosion resistance of
17、1.2, should be made by the manufac-turer and included and reported in the heat analysis forinformation purposes only to identify the type of steel applied.For Grades Ia and Ib material, the atmospheric corrosion-resistance index, calculated on the basis of the chemicalcomposition of the steel as des
18、cribed in Guide G101, shall be6.0 or higher.NOTE 2The user is cautioned that the Guide G101 predictive equationfor calculation of an atmospheric corrosionresistance index has beenverified only for the composition limits stated in that guide.6.1.2 When Grade III is required for enhanced corrosionresi
19、stance, copper limits may be specified and the minimumcontent shall be 0.20 % by heat analysis and 0.18 % by productanalysis.6.2 HeatAnalysisAn analysis of each heat of open-hearth,basic-oxygen, or electric-furnace steel shall be made by themanufacturer. This analysis shall be made from a test ingot
20、taken during the pouring of the heat. The chemical compositionthus determined shall conform to the requirements specified inTable 1 for heat analysis.6.3 Product Analysis:6.3.1 An analysis may be made by the purchaser fromfinished tubing manufactured in accordance with this specifi-cation, or an ana
21、lysis may be made from flat-rolled stock fromwhich the welded tubing is manufactured. When productanalyses are made, two sample lengths from a lot of each 500lengths, or fraction thereof, shall be selected. The specimensfor chemical analysis shall be taken from the sample lengths inaccordance with t
22、he applicable procedures of Test Methods,Practices, and Terminology A751. The chemical compositionthus determined shall conform to the requirements specified inTable 1 for product analysis.6.3.2 In the event the chemical composition of one of thesample lengths does not conform to the requirements sh
23、own inTable 1 for product analysis, an analysis of two additionallengths selected from the same lot shall be made, each of whichshall conform to the requirements shown in Table 1 for productanalysis, or the lot is subject to rejection.7. Mechanical Requirements Mechanical Requirements7.1 Tensile Pro
24、perties:7.1.1 The material, as represented by the test specimen,shall conform to the requirements prescribed in Table 2.7.1.2 Elongation may be determined on a gage length ofeither 2 in. 50 mm or 8 in. 200 mm at the manufacturersoption.7.1.3 For material under516 in. 8.0 mm in thickness, adeduction
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