1、Designation:A1057/A1057M08(Reapproved 2014)Standard Specification forSteel,Structural Tubing,Cold Formed,Welded,Carbon,Zinc-Coated(Galvanized)by the Hot-Dip Process1This standard is issued under the fixed designation A1057/A1057M;the number immediately following the designation indicates theyear of
2、original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers cold-formed electric resistanceor electr
3、ic induction welded carbon structural steel tubing inround,square,rectangular,or special shapes that are zinc-coated(galvanized)on the exterior surface only,in continuouscoating lines by the hot-dip process.The tubing can bemanufactured from hot-rolled or cold-rolled steel.This productis intended fo
4、r applications where corrosion resistance andmechanical properties are required.This product is available inseveral zinc coating weights masses,strengths,and chemicalcompositions.1.2 UnitsThe values stated in either SI units or inch-pound units shall be regarded separately as standard.Thevalues stat
5、ed in each system may not be exact equivalents;therefore,each system is to be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.2.Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Ste
6、el Articles with Zinc or Zinc-Alloy CoatingsA902 Terminology Relating to Metallic Coated Steel Prod-uctsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA500/A500M Specification for Cold-Formed Welded andSeamless Carbon Steel Structural Tubing in Rounds andShapesA924/A924M Sp
7、ecification for General Requirements forSteel Sheet,Metallic-Coated by the Hot-Dip ProcessE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 DefinitionsSee Terminology A902 for definitions ofgeneral terminology relating to metallic-coat
8、ed tube steelproducts.3.2 Definitions of Terms Specific to This Standard:3.2.1 acrylicpolymer based on resins prepared from acombination of acrylic and methacrylic esters,acrylic andmethacrylic acids,and styrene.3.2.1.1 DiscussionThe polymers contain functionalgroups such as amide,hydroxyl,or carbox
9、yl and form thermo-setting systems on baking by cross linking with them,or withamino or epoxy resins.3.2.2 de-dimpledThe condition of the end of tubing afterremoval of the protrusion or deformation created by the punchcut operation.3.2.2.1 DiscussionThe dimple is a protrusion that is dis-placed from
10、 the inside diameter and is unrelated to a shear burr.3.2.3 structural tubingtubing tension tested with reportedtest results.4.Dimensions4.1 The product is available in the following sizes:ProductWallThickness,maxExteriorDimension,maxRound Tubing0.250 in.6.5 mmdiameter5.0 in.125 mmSquare,Rectangular
11、,or Special Shapes0.250 in.6.5 mmperiphery16.0 in.405 mm5.Classification5.1 The tube material is available in the following designa-tions:5.1.1 Structural tubing steel STS 38,48,58,and 68.5.1.2 The material is available as zinc-coated in severalcoating weights masses as shown in Table 1.6.Ordering I
12、nformation6.1 Welded tubing with the coating on the exterior surface isonly produced to thickness requirements expressed to 0.001 in.0.01 mm.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A
13、05.11 on Sheet Specifications.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 2008.Last previous edition approved in 2008 as A1057/A1057M 08.DOI:10.1520/A1057_A1057M-08R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service
14、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 6.2 Orders for product to this specification shall incl
15、ude thefollowing information,as necessary,to adequately describe thedesired product.6.2.1 Designation of product(STS)6.2.2 Coating designation(see Table 1)6.2.3 Chemical requirements(see Table 2)6.2.4 Mechanical requirements(see Table 3)6.2.5 Chemical treated or not chemical treated6.2.5.1 When chem
16、ical treatment is not specified,the prod-uct will be furnished as chemical treated,6.2.6 Top coated or not top treated(applied over chemicaltreatment)6.2.6.1 When“top coated”is not specified,the product willbe supplied with an acrylic coating,6.2.7 Oiled or not oiled6.2.7.1 When oiled is not specified,the product will beprovided as chemical treated.6.2.8 End condition6.2.8.1 When the removal of burrs is not specified,theproduct will be furnished with burrs,6.2.9 Mill cut or de-dimpled end condit
