ASTM_B_938_-_04.pdf

Designation:B 938 04Standard Specification forCopper-Beryllium Alloy Forgings and Extrusions(UNS Nos.C17500 and C17510)1This standard is issued under the fixed designation B 938;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.Scope1.1 This specification establishes the requirements forcopper-cobalt-beryllium alloy(UNS No.C17500)and copper-nickel-beryllium alloy(UNS No.C17510)forgings and extru-sions.1.2 The intent is to provide a system of interchangeablealloys.1.3 UnitsValues stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units,which are provided forinformation only and are not considered standard.1.4 The following safety hazard caveat pertains only to thetest method(s)described in this specification.This standarddoes not 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 limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2B 194 Specification for Copper-Beryllium Alloy Plate,Sheet,Strip,and Rolled BarB 249/B 249M Specification for General Requirements forWrought Copper and Copper-Alloy Rod,Bar,Shapes,andForgingsB 601 Classification for Temper Designations for Copperand Copper Alloys-Wrought and CastB 846 Terminology for Copper and Copper AlloysE 8 Test Methods for Tension Testing of Metallic MaterialsE 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic MaterialsE 1004 Practice for Determining Electrical ConductivityUsing the Electromagnetic(Eddy-Current)Method3.General Requirements3.1 The following sections of Specification B 249/B 249Mconstitute a part of this specification.3.1.1 Terminology,3.1.2 Materials and Manufacture,3.1.3 Sampling,3.1.4 Number of Tests and Retests,3.1.5 Sample Preparation,3.1.6 Test Methods,3.1.7 Significance of Numerical Limits,3.1.8 Inspection,3.1.9 Rejection and Rehearing,3.1.10 Certification3.1.11 Mill Test Report,3.1.12 Packaging,Marking,Shipping,and Preservation.3.2 An identical section in this specification supplementsthe referenced section.4.Terminology4.1 For definitions of terms related to copper and copperalloys,refer to Terminology B 846.4.2 Definitions of Terms Specific to This Standard:4.2.1 extrusion,na uniform metal shape,long in relationto its cross-sectional dimensions,produced by forcing a suit-ably preheated billet or preform through an orifice(die)of thedesired cross section.Extrusions generally are furnished instraight lengths.4.2.2 forging,na metal part worked to a predeterminedshape by one or more such processes as hammering,upsetting,pressing,rolling,and so forth.5.Ordering Information5.1 Include the following information when placing ordersfor product under this specification,as applicable:5.1.1 ASTM designation and year of issue,5.1.2 Quantitytotal weight or total length or number ofpieces of each size,5.1.3 Copper Alloy UNS No.(Section 1).5.1.4 Temper(Section 8)or condition(Section 12),5.1.5 Drawing showing the shape,dimensions,and toler-ances,if required,1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,Bar,Wire,Shapes,and Forgings.Current edition approved May 1,2004.Published May 2004.2For 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.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.5.1.6 If an extrusion,the length(or mass)required andstraightness as required,5.2 The following options are available and should bespecified at the time of placing of the order,when required:5.2.1 Tension tests(Section 11)5.2.2 Special tests such as electrical conductivity,5.2.3 Finish(Section 15),and5.2.4 When product is ordered for agencies of the U.S.government.6.Materials and Manufacture6.1 Materials:6.1.1 The material of manufacture shall be cast or wroughtbillet of Copper Alloy UNS No.C17500 or C17510 of suchpurity and soundness as to be suitable for processing in to theproducts prescribed herein.6.1.2 The product heat number shall appear on the certifi-cation or test report.6.2 Manufacture:6.2.1 The product shall be manufactured by hot workingand heat treating as may be necessary to meet the propertiesspecified herein.6.2.2 The product shall be hot worked to the finished size,and subsequently annealed when required,to meet the temperproperties specified.7.Chemical Composition7.1 The mat