ASTM_B_770_-_15.pdf

Designation:B77015Standard Specification forCopper-Beryllium Alloy Sand Castings for GeneralApplications1This standard is issued under the fixed designation B770;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()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 establishes requirements for copper-beryllium alloy sand castings for general applications andnominal compositions alloys defined by this specification areshown in Table 1.21.2 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 The following safety hazard caveat pertains only to thetest methods described in this specification:This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory requirementsprior to use.2.Referenced Documents2.1 The following documents in the current issue of theBook of Standards form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:3B30 Specification for Copper Alloys in Ingot FormB208 Practice for Preparing Tension Test Specimens forCopper Alloy Sand,Permanent Mold,Centrifugal,andContinuous CastingsB601 Classification for Temper Designations for Copper andCopper AlloysWrought and CastB824 Specification for General Requirements for CopperAlloy CastingsB846 Terminology for Copper and Copper AlloysE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)3.General Requirements3.1 The following sections of Specification B824 constitutea part of this specification:3.1.1 Terminology,3.1.2 Material and Manufacture,3.1.3 Chemical Composition,3.1.4 Dimensions and Permissible Variations,3.1.5 Workmanship,Finish and Appearance,3.1.6 Sampling,3.1.7 Number of Tests and Retests,3.1.8 Specimen Preparation,3.1.9 Test Methods,3.1.10 Significance of Numerical Limits,3.1.11 Inspection,3.1.12 Rejection and Rehearing,3.1.13 Certification,3.1.14 Mill Test Report,and3.1.15 Packaging and Package Marking.3.2 In addition,when a section with a title identical to thatreferenced in 3.1 appears in this specification,it containsadditional requirements which supplement those appearing inSpecification B824.4.Terminology4.1 For definitions of terms relating to copper and copperalloys,refer to Terminology B846.5.Ordering Information5.1 Include the following information for orders for prod-uct:5.1.1 ASTM designation number,title,and year of issue,5.1.2 Copper Alloy UNS Number designation,5.1.3 Temper,5.1.4 Quantity of castings required,1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.05 onCastings and Ingots for Remelting.Current edition approved May 1,2015.Published May 2015.Originallyapproved in 1987.Last previous edition approved in 2010 as B770 10.DOI:10.1520/B0770-15.2The UNS system for copper and copper alloys(see Practice E527)is a simpleexpansion of the former standard designation system accomplished by the additionof a prefix“C”and a suffix“00”.The suffix can be used to accommodatecomposition variations of the base alloy.3For 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 standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.5 Pattern or drawing number,and condition(cast,machined,and so forth),5.1.6 When material is purchased for agencies of the U.S.government,the Supplementary Requirements of SpecificationB824 may be specified.5.2 The following options are available and should bespecified in the contract or purchase order when required.5.2.1 Mechanical requirements,if specified in the purchaseorder(Section 10),5.2.2 Pressure test requirements,if specified in the purchaseorder(Specification B824),5.2.3 Soundness requirements,if specified in the purchaseorder(Specification B824),5.2.4 Repair of castings(Section 12),5.2.5 Certification,if specified in the purchase order(Speci-fication B824),5.2.6 Foundry test report,if specified in the purchase order(Specification B824),5.2.7 Witness inspection,if specified in the purchase order(Specification B824),and5.2.8 Product marking,if specified in the purchase order(Specification B824).6.Materials and Manufact