ASTM_A_953_-_02.pdf

Designation:A 953 02Standard Specification forAustenitic Chromium-Nickel-Silicon Alloy Steel Seamlessand Welded Tubing1This standard is issued under the fixed designation A 953;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers grades of nominal-wall-thickness,austenitic alloy steel tubing for general corrosion-resisting and low-or high-temperature service,having aspecified minimum chromium content of less than 10.50%.1.2 The tubing sizes and thicknesses usually furnished tothis specification are14in.(6.4 mm)in inside diameter andlarger and 0.020 in.(0.51 mm)in nominal wall-thickness andheavier.1.3 Mechanical property requirements do not apply totubing smaller than18in.(3.2 mm)in inside diameter or 0.015in.(0.38 mm)in thickness.1.4 Some steels covered by this specification,especially thehigh silicon containing steels,because of their particular alloycontent and specialized properties,may require special care intheir fabrication and welding.Specific procedures are offundamental importance,and it is presupposed that all param-eters will be in accordance with approved methods capable ofproducing the desired properties in the finished fabrication.1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.The values stated ineach system are not exact equivalents;therefore,each systemmust be used independently of the other.Combining valuesfrom the two systems may result in nonconformance with thespecification.Unless the order specifies the applicable“M”specification designation(SI units),the material shall befurnished in inch-pound units.2.Referenced Documents2.1 ASTM Standards:A 370 Test Methods and Definitions for Mechanical Testingof Steel Products2A 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet,and Strip2A 632 Specification for Seamless and Welded AusteniticStainless Steel Tubing(Small-Diameter)for General Ser-vice3A 1016/A 1016M Specification for General Requirementsfor Ferritic Alloy Steels,Austenitic and Stainless SteelTubes32.2ANSI Standard:B 31.3 Chemical Plant and Petroleum Refinery Piping42.3ASME Pressure Vessel Code:Section VIII Division 1,Pressure Vessels53.Ordering Information3.1 Orders for material under this specification shouldinclude the following,as required,to describe 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 nominal wall thickness),3.1.5 Length(specific or random),3.1.6 Test report required(see Section on Inspection ofSpecification A 1016/A 1016M),3.1.7 Specification designation,and3.1.8 Special requirements.4.General Requirements4.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A 1016/A 1016M,unless otherwise providedherein.5.Manufacture5.1 The tubes shall be made by the seamless or weldedprocess.5.2 At the manufacturers option,tubing may be furnishedeither hot finished or cold finished.1This specification 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 Sept.10,2002.Published October 2002.Originallypublished as A 953-96.Last previous edition A 953-96.2Annual Book of ASTM Standards,Vol 01.03.3Annual Book of ASTM Standards,Vol 01.01.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.5Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.6.Heat Treatment6.1 All material shall be furnished in the heat-treatedcondition.Except as provided in 6.2,the heat-treatment pro-cedure shall,consist of heating the material to a minimumtemperature of 1900F(1040C)and quenching in water orrapidly cooling by other means.6.2 Controlled structural or special service characteristicsshall be specified as a guide for the most suitable heattreatment.If the final heat treatment is at a temperature under1900F and is so specified on the order,each tube shall bestenciled with the final heat treatment temperature in degreesFahrenheit after the suffix“HT.”6.3 S70003 shall be heat treated in the range 1920F(1050C)minimum to 2010F(1100C)maximum followed bya water quench or rapid cooling by other means.7.Chemical Composition7.1 The steel shall conform to the