1、Designation:A334/A334M04a(Reapproved 2016)Standard Specification forSeamless and Welded Carbon and Alloy-Steel Tubes forLow-Temperature Service1This standard is issued under the fixed designation A334/A334M;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.1.Scope1.1 This specification2covers several grades of minimum-wall-thickness,seamless and welded,c
3、arbon and alloy-steeltubes intended for use at low temperatures.Some product sizesmay not be available under this specification because heavierwall thicknesses have an adverse affect on low-temperatureimpact properties.1.2 Supplementary Requirement S1 of an optional nature isprovided.This shall appl
4、y only when specified by the pur-chaser.NOTE1For tubing smaller than12in.12.7 mm in outside diameter,the elongation values given for strip specimens in Table 1 shall apply.Mechanical property requirements do not apply to tubing smaller than18in.3.2 mm in outside diameter and with a wall thickness un
5、der 0.015 in.0.4 mm.1.3 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 equivalents;therefore,each system mustbe used independently of the other.Combining
6、 values from thetwo systems may result in nonconformance with the specifi-cation.The inch-pound units shall apply unless the“M”designation of this specification is specified in the order.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is ther
7、esponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA1016/A1016M Spe
8、cification for General Requirements forFerritic Alloy Steel,Austenitic Alloy Steel,and StainlessSteel TubesE23 Test Methods for Notched Bar Impact Testing of Me-tallic Materials3.Ordering Information3.1 Orders for material under this specification shouldinclude the following,as required to describe
9、the desiredmaterial adequately:3.1.1 Quantity(feet,metres,or number of lengths),3.1.2 Name of material(seamless or welded tubes),3.1.3 Grade(Table 1),3.1.4 Size(outside diameter and minimum wall thickness),3.1.5 Length(specific or random),3.1.6 Optional requirements(other temperatures,Section14;hydr
10、ostatic or electric test,Section 16),3.1.7 Test report required,(Certification Section of Specifi-cation A1016/A1016M),3.1.8 Specification designation,and3.1.9 Special requirements and any supplementary require-ments selected.4.General Requirements4.1 Material furnished under this specification shal
11、l con-form to the applicable requirements of the current edition ofSpecification A1016/A1016M,unless otherwise providedherein.5.Materials and Manufacture5.1 The tubes shall be made by the seamless or automaticwelding process with no addition of filler metal in the weldingoperation.1This specificatio
12、n is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved March 1,2016.Published March 2016.Originallyapproved in 1951.Last previous editi
13、on approved in 2010 as A334/A334M 04a(2010).DOI:10.1520/A0334_A0334M-04AR16.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-334 in Section II of that Code.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servic
14、eastm.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.Heat Treatment6.1 All seamless and welded tubes,other than Gra
15、des 8 and11,shall be treated to control their microstructure in accor-dance with one of the following methods:6.1.1 Normalize by heating to a uniform temperature of notless than 1550 F 845 C and cool in air or in the coolingchamber of an atmosphere controlled furnace.6.1.2 Normalize as in 10.1.1,and
16、,at the discretion of themanufacturer,reheat to a suitable tempering temperature.6.1.3 For the seamless process only,reheat and control hotworking and the temperature of the hot-finishing operation to afinishing temperature range from 1550 to 1750 F 845 to 955C and cool in a controlled atmosphere furnace from an initialtemperature of not less than 1550 F 845 C.6.1.4 Treat as in 6.1.3 and,at the discretion of themanufacturer,reheat to a suitable tempering temperature.6.2 Grade 8 tubes shall be he