1、Designation:A51206(Reapproved 2012)Standard Specification forCold-Drawn Buttweld Carbon Steel Mechanical Tubing1This standard is issued under the fixed designation A512;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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.Scope*1.1 This specification covers cold-drawn buttweld
3、 carbonsteel tubes for use as mechanical tubing.1.2 This specification covers round,square,rectangular,andspecial shape mechanical tubing.1.3 Round tube size ranges covered are outside diameters upto 312in.(88.9 mm)and wall thickness from 0.035 to 0.500in.(0.89 to 12.70 mm).1.4 Optional supplementar
4、y requirements are provided and,when desired,shall be so stated in the order.1.5 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referen
5、ced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA1040 Guide for Specifying Harmonized Standard GradeCompositions for Wrought Carbon,Low-Alloy,and AlloySteelsE59 Practice for Sampling Steel and Iron for Determinationof Chemical Composition(Wit
6、hdrawn 1996)32.2 Military Standards:4MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Steel Mill Products Preparation for Shipmentand Storage2.3 Federal Standard:Fed.Std.No.123 Marking for Shipments(Civil Agencies)43.Ordering Information3.1 Orders for material under this specification shouldi
7、nclude the following,as required,to describe the requiredmaterial adequately:3.1.1 Quantity(feet,weight(Note 1),or number of lengths),NOTE1The term“weight”is temporarily used in this specificationbecause of established trade usage.The word is used to mean both“force”and“mass,”and care must be taken
8、to determine which is meant in eachcase(SI unit for force=newton and for mass=kilogram).3.1.2 Name of material(buttweld carbon steel mechanicaltubing),3.1.3 Form(round,square,rectangular,special shape),3.1.4 Condition,description and code letters(Section 5),3.1.5 Grade,if required(Section 6),3.1.6 D
9、imensions(round,Section 9 or square andrectangular,Section 10),3.1.7 Length(round length,9.2;square and rectangularlength,10.5),3.1.8 Burr removal(Section 11),3.1.9 Report of chemical analysis and products analysis,ifrequired,3.1.10 Individual supplementary requirements if required(S1 through S5),3.
10、1.11 Special requirements,3.1.12 End use,3.1.13 Specification designation,3.1.14 Special marking(Section 15),and3.1.15 Special packaging(Section 16).4.Materials and Manufacture4.1 The steel shall be made by any process.4.2 If a specific type of melting is required by the purchaser,it shall be as sta
11、ted on the purchase order.4.3 The primary melting may incorporate separate degas-sing or refining,and may be followed by secondary melting,such as electroslag or vacuum-arc remelting.If secondarymelting is employed,the heat shall be defined as all of theingots remelted from a single primary heat.1Th
12、is 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 March 1,2012.Published November 2012.Originallyapproved in 1964.Last previous
13、edition approved in 2006 as A512 06.DOI:10.1520/A0512-06R12.2For 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.3The l
14、ast approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100
15、Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);4.4 Steel may be cast in ingots or may be strand cast.Whensteel of different grades is sequentially strand cast,identifica-tion of the resultant transition material is required.The
16、producer shall remove the transition material by an establishedprocedure that positively separates the grades.4.5 Tubes shall be made by the furnace buttweld process.4.6 Tubes shall be cold finished,either externally only(sunk)or externally and internally(mandrel drawn).5.Condition5.1 The purchaser shall specify in the order one of thefollowing conditions:MD(Mandrel Drawn)No final thermal treatmentSD(Sink Drawn)No final thermal treatmentMDSRMandrel Drawn and Stress RelievedSDSRSink Drawn and Str
