1、Designation:A27/A27M17Standard Specification forSteel Castings,Carbon,for General Application1This standard is issued under the fixed designation A27/A27M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers carbon steel castings for ge
3、n-eral applications that require up to 70 ksi(485 MPa)minimumtensile strength.NOTE1The grades covered by this specification represent materialsthat are suitable for assembly with other steel castings or wrought steelparts by fusion welding.It is not intended to imply that all these gradespossess the
4、 same degree of weldability or that the same weldingtechniques can be used on all castings.It is the responsibility of thepurchaser to establish for himself a suitable welding technique.1.2 Several grades and two classes of steel castings arecovered,as indicated below.The grade and class desired sha
5、llbe specified by the purchaser.1.2.1 Grade N-1Chemical analysis only.1.2.2 Grade N-2Heat treated but not mechanically tested.1.2.3 Grade U-60-30 415-205Mechanically tested butnot heat treated.1.2.4 Grades 60-30 415-205,65-35 450-240,70-36485-250,and 70-40 485-275Heat treated and mechani-cally teste
6、d.1.2.5 Class 1 and Class 2 steel castings shall be specified inaccordance with 9.2.1.3 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 t
7、he other.Combiningvalues from the two systems may result in nonconformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practice
8、s and determine the applica-bility of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Rec
9、om-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A781/A781M Specification for Castings,Steel and Alloy,Common Requirements,for General Industrial UseA957/A957M Specification for Investment Castings,Steeland Alloy,
10、Common Requirements,for General IndustrialUse3.General Conditions for Delivery3.1 Except for steel investment castings,material furnishedto this specification shall conform to the requirements ofSpecification A781/A781M,including any supplementary re-quirements that are indicated in the purchase ord
11、er.Failure tocomply with the general requirements of Specification A781/A781M constitutes nonconformance with the specification.Incase of a conflict between the requirements of this specificationand Specification A781/A781M,this specification shall pre-vail.3.2 Steel investment castings furnished to
12、 this specificationshall conform to the requirements of Specification A957/A957M,including any supplementary requirements that areindicated in the purchase order.Failure to comply with thecommon requirements of Specification A957/A957M consti-tutes nonconformance with this specification.In case of c
13、on-flict between the requirements of this specification and Speci-fication A957/A957M,Specification A957/A957M shallprevail.4.Ordering Information4.1 Orders for material under this specification shouldinclude the following information in proper sequence.4.1.1 Quantity,1This specification is under th
14、e jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved May 1,2017.Published May 2017.Originallyapprovedin1901.Lastpreviouseditionapprovedin2016asA27/A27M 13(2016).DOI:10.1520/A0027_A0
15、027M-17.2For 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.*A Summary of Changes section appears at the end of this s
16、tandardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.1.2 Specification,grade(1.2),and class(9.2),4.1.3 Description of th