ASTM_A_608_-_A_608M_-_14.pdf

Designation:A608/A608M14Standard Specification forCentrifugally Cast Iron-Chromium-Nickel High-Alloy Tubingfor Pressure Application at High Temperatures1This standard is issued under the fixed designation A608/A608M;the number immediately following the designation indicates the yearof original adoption or,in 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.Scope*1.1 This specification covers iron-chromium-nickel,high-alloy tubes made by the centrifugal casting process intendedfor use under pressure at high temperatures.1.2 The grades of high alloys detailed in Table 1 areintended for applications requiring strength and resistance tocorrosion and scaling at high temperatures.1.3 Optional Supplementary Requirements S1 to S11 areprovided;these call for additional tests to be made if desired.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4.1 Within the text,the SI units are shown in brackets.2.Referenced Documents2.1 ASTM Standards:2A342/A342M Test Methods for Permeability of WeaklyMagnetic MaterialsA488/A488M Practice for Steel Castings,Welding,Qualifi-cations of Procedures and PersonnelA999/A999M Specification for General Requirements forAlloy and Stainless Steel PipeE8 Test Methods for Tension Testing of Metallic MaterialsE21 Test Methods for Elevated Temperature Tension Tests ofMetallic MaterialsE94 Guide for Radiographic ExaminationE139 Test Methods for Conducting Creep,Creep-Rupture,and Stress-Rupture Tests of Metallic MaterialsE142 Method for Controlling Quality of Radiographic Test-ing(Withdrawn 2000)3E151 Recommended Practice for Tension Tests of MetallicMaterials at Elevated Temperatures with Rapid Heatingand Conventional or Rapid Strain Rates(Withdrawn1984)3E165 Practice for Liquid Penetrant Examination for GeneralIndustryE340 Test Method for Macroetching Metals and Alloys3.Ordering Information3.1 Orders for material to this specification should includethe following,as required,to describe the desired materialadequately:3.1.1 Quantity(feet,centimeters,or number of lengths),3.1.2 Name of material(centrifugally cast tubing),3.1.3 Specification number and grade(Table 1),3.1.4 Size(outside or inside diameter and minimum wallthickness,see Section 8).3.1.5 Condition(see Section 9,as cast or as cast withmachining on outside or inside surfaces,or machined;see 5.1,8,and 9),3.1.6 Length(specific or random),(Permissible Variationsin Length Section of Specification A999/A999M),3.1.7 End finish(Ends Section of Specification A999/A999M),3.1.8 Optional requirements(see 8.2.3 regarding the manu-facturers wall thickness allowance for as cast tubing andSupplementary Requirements S1 to S11),3.1.9 Test report required(see Section 13),and3.1.10 Special requirements to be added to the specification.4.General Requirements4.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A999/A999M,unless otherwise provided herein.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved Oct.1,2014.Published November 2014.Originallyapproved in 1970.Last previous edition approved in 2012 as A608/A608M 12.DOI:10.1520/A0608_A0608M-12.2For 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 last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Materials and Manufacture5.1 The tubing may be supplied in the as cast condition or ascast with machining on the outside or inside surfaces,ormachined,as agreed upon between the manufacturer and thepurchaser.5.2 Heat treatment of the tubing shall not be required underthis specification.6.Chemical Requirements6.1 The material shall conform to the requirements as tochemical composition as prescribed in Table 1.7.Tensile Properties7.1 Tension tests at room temperature are not recommendedas acceptance criteria under this specification since the alloysare intended for elevated-temperature service,and room-temperature tests do not have a dependable relationship toelevated-temperature properties.(Where the design of thetubing is based on an assumption of certain minimum creep-rupture properties,one of