1、Designation:B550/B550M07(Reapproved 2012)Standard Specification forZirconium and Zirconium Alloy Bar and Wire1This standard is issued under the fixed designation B550/B550M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of
2、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.Scope1.1 This specification2covers three grades of zirconium andzirconium alloy bar and wire.1.2 Unless a single unit is used,for e
3、xample corrosion massgain in mg/dm2,the values stated in either inch-pound or SIunits are to be regarded separately as standard.The valuesstated in each system are not exact equivalents;therefore eachsystem must be used independently of the other.SI valuescannot be mixed with inch-pound values.1.3 T
4、he following precautionary caveat pertains only to thetest methods portions of 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 practic
5、esand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:3E8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Definitions of
6、 Terms Specific to This Standard:3.1.1 annealed,ndenotes material that exhibits a recrys-tallized grain structure.3.2 Lot Definitions:3.2.1 bar and wire,na lot shall consist of a material of thesame size,shape,condition,and finish produced from the sameingot or powder blend by the same reduction sch
7、edule and thesame heat treatment parameters.Unless otherwise agreedbetween manufacturer and purchaser,a lot shall be limited tothe product of an 8 h period for final continuous anneal,or toa single furnace load for final batch anneal.3.2.2 Forms:3.2.2.1 bar,na hot rolled,forged,or cold worked semi-f
8、inished solid section product whose cross sectional area isequal to or less than 16 in.210 323 mm2;rectangular bar mustbe less than or equal to 10 in.254 mm in width and greaterthan 0.1875 in.4.8 mm in thickness.3.2.2.2 wire,nrounds,flats,or special shapes less than orequal to 0.1875 in.4.8 mm in th
9、ickness or major dimension.4.Classification4.1 The bar or wire is to be furnished in three grades asfollows:4.1.1 Grade R60702Unalloyed zirconium.4.1.2 Grade R60704Zirconium-tin.4.1.3 Grade R60705Zirconium-niobium.5.Ordering Information5.1 Orders for material under this specification shouldinclude t
10、he following information:5.1.1 Quantity(weight or number of pieces),5.1.2 Name of material(zirconium bar or wire)(Table 1),5.1.3 Grade number(see 4.1),5.1.4 Standard designation and year of issue,for exampleASTM Specification B550/B550M-07,and5.1.5 Additions to the specification as required.NOTE1A t
11、ypical ordering description is as follows:1000 lb 500 kgzirconium cold drawn bar,0.35 in.10 mm in diameter by 10 ft 3 m inlength,ASTM B550-01,Grade R60702.6.Materials and Manufacture6.1 Bar and wire covered by this specification shall beformed with conventional fabrication methods and equipmentfound
12、 in primary ferrous and nonferrous metal plants.6.2 The products covered include the sections and sizesshown in Table 1.6.3 Bar and wire will be supplied in the conditions pre-scribed in Table 2.1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and
13、Alloys and is the direct responsibility ofSubcommittee B10.02 on Zirconium and Hafnium.Current edition approved May 1,2012.Published May 2012.Originallyapproved in 1971.Last previous edition approved in 2007 as B550/B550M 07.DOI:10.1520/B0550_B0550M-07R12.2For ASME Boiler and Pressure Vessel Code ap
14、plications,see related Specifi-cation SB-550 in Section II of that Code.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 we
15、bsite.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Chemical Composition7.1 The material shall conform to the requirements as tochemical composition prescribed in Table 3.7.2 The manufacturers ingot analysis shall be consideredthe che
16、mical analysis for bar and wire,except for hydrogen andnitrogen,which shall be determined on the finished product.7.3 When requested by the purchaser and stated in thepurchase order,a product analysis for any elements listed inTable 3 shall be made on the finished product.7.3.1 The manufacturers analysis shall be considered asverified if the check analysis confirms the manufacturersreported values within the tolerances prescribed in Table 4.8.Mechanical Properties8.1 The annealed material shall
