B550B550M-07 (Reapproved 2012).pdf

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 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 example 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 The 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 practicesand 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 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 schedule 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-finished 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 thickness 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 the 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 typical 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 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 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 applications,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 website.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 chemical 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 conform to the requirementsfor mechanical properties,at room temperature,as prescribedin Table 5.Wire supplied for welding applications shall befurnished with a temper suitable for uniform feeding insemiautomatic or automatic welding equipment.9.Permissible Variations in Dimensions9.1 Unless otherwise specified,all bar or wire shall conformto the permissible variations in dimensions prescribed in Tables6-14,as follows:9.1.1 Table 6,Dimensional Tolerances for Hot-FinishedRounds,Squares,Octagons,and Hexagons.9.1.2 Table 7,Dimensional Tolerances in Hot-Rolled FlatBars.9.1.3 Table 8,Permissible Variations in Sectional Dimen-sions for Cold-Finished Bars in Rounds,Hexagons,Octagons,and Squares.9.1.4 Table 9,Permissible Variations in Width and Thick-ness for Cold-Finished Bars in Flats.9.1.5 Table 10,Permissible Variations in Sectional Dimen-sions for Wire.9.1.6 Table 11,Permissible Variations in Thickness andWidth for Cold-Finished Flat Wire.9.1.7 Table 12,Permissible Variations in Length for Hot-Finished or Cold-Finished Bars.9.1.8 Table 13,Permissible Variations in Length for Roundand Shape,Straightened and Cut Wire,and Exact LengthResheared Wire.9.1.9 Table 14,Permissible Variations in Straightness forHot-or Cold-Finished Bars.10.Workmanship,Finish,and Appearance10.1 Bars in the hot-finished condition which will conformto the tolerances prescribed in Tables 6 and 7,shall befurnished with one of the following finishes as designated onthe purchase order:10.1.1 Not descaled,10.1.2 Mechanically descaled,10.1.3 Mechanically descaled and pickled,and10.1.4 Turned(round bars only).10.2 Bars and wire in cold-finished condition that willconform to the tolerances prescribed in Tables 8-12,shall befurnished with one of the following finishes as designated onthe purchase order.10.2.1 Cold drawn or cold rolled,or swaged,10.2.2 Turned(round bars only),10.2.3 Centerless ground(round bars only),and10.2.4 Polished(round bars only).10.3 Bars or wire shall be free of cracks,seams,slivers,blisters,burrs,and other injurious imperfections in accordancewith standards of acceptability agreed upon between themanufacturer and the purchaser.11.Significance of Numerical Limits11.1 For the purpose of determining compliance with thespecified limits for requirements of the properties listed in thefollowing table,an observed value or a calculated value shallbe rounded as indicated in accordance with the roundingmethods of Practice E29.TABLE 1 Product Sections and SizeProductSectionSizeBars:Hot-finished round,squares,octagons,and hexagons14in.6.4 mm and over in diameter or sizeHot-finished flats14in.6.4 mm to 10 in.250 mm,incl,in width,and18in.3.2 mm and over in thicknessCold-finished rounds,squares,octagons,hexagons,andshapesOver12in.13 mm in diameter or sizeACold-finished flats38in.9.5 mm and over in width,Band18in.3.2 mmand over in thicknessCWire:Cold-finished rounds,squares,octagons,hexagons,andshapes12in.13 mm and under in diameter or sizeCold-finished flats116in.1.6 mm to under38in.9.5 mm in width,and0.010 in.25 mm to under316in.4.8 mm inthicknessASizes12in.13 mm and under are wire when in coils,and cut wire when finished in straight lengths.BWidths less than38in.9.5 mm and thicknesses less than316in.4.8 mm are generally described as flat wire.CThickness18in.3.2 mm to under316in.4.8 mm can be cold-rolled strip as well as bar.TABLE 2 ConditionFormConditionBarshot finishedhot finished and annealedcold finishedcold finished and annealedWirecold finishedcold finished and annealedB550/B550M 07(2012)2 PropertyRounded Unit for Observed orCalculated ValueChemical composition and tolerances(when expressed as decimals)nearest unit in the last right-hand placeof figures of the specified limitTensile strength and yield strengthnearest 1000 psi(10 MPa)Elongationnearest 1%12.Number of Tests and Retests12.1 One longitudinal tension test shall be made from eachlot of bar and rod,see 13.1.12.2 One chemistry test for hydrogen and nitrogen contentshall be made from each lot of finished product,see 13.2.12.3 Retests:12.3.1 If any sample or specimen exhibits obvious surfacecontamination or improper preparation disqualifying it as atruly representative sample,it shall be discarded and a newsample or specimen substituted.12.3.2 If the results of any tests of any lot do not conform tothe requirements specified,retests shall be made on additionalsamples from the same lot,each of which shall conform to therequirements specified.TABLE 3 Chemical RequirementsAElementComposition,%Grades R60702Grades R60704Grades R60705Zirconium+hafnium,min99.297.595.5Hafnium,max4.54.54.5Iron+chromium0.2 max0.2 to 0.40.2 maxTin.1.0 to 2.0.Hydrogen,max0.0050.0050.005Nitrogen,max0.0250.0250.025Carbon,max0.050.050.05Niobium.2.0 to 3.0Oxygen,max0.160.180.18ABy agreement between the purchaser and the manufacturer,analysis may be required and limits established for elements and compounds not specified in the table ofchemical composition.TABLE 4 Permissible Variation in Check Analysis BetweenDifferent LaboratoriesElementPermissible Variation inProduct Analysis,%Hydrogen0.002Nitrogen0.01Carbon0.01Hafnium0.1Iron+chromium0.025Tin0.05Niobium0.05Oxygen0.02TABLE 5 Tensile RequirementsAGradesR60702R60704R60705Tensile Strength,min,ksi(MPa)55 38060 41580 550Yield Strength,min,ksi(MPa)30 20535 24055 380Elongation in 2 in.or 50 mm min,%B161416AFor bar only.BWhen a sub-size specimen is used,the gage length shall be as specified in TestMethods E8 for the specimen.TABLE 6 Dimensional Tolerances for Hot-Finished Rounds,Squares,Octagons,and HexagonsSpecified Size,in.mmVariation inSize,in.mmOut of Round,Out of Square,in.mmUp0.500 13+0.030 0+0.750.025 0.64Over 0.5001.000 1325+0.050 0+1.30.040 1Over 1.0002.000 2550+0.070 0+1.80.060 1.5Over 2.000-4.000 50100+0.150 0+3.80.080 2Over 4.0006.000 100150+0.250 0+6.40.100 2.5TABLE 7 Dimensional Tolerances in Hot-Rolled Flat BarsThickness,in.mmVariation inThickness,in.mmVariation in Width,Ain.mmUp0.150 3.8+0.020 0+0.5180 3.2Over 0.1500.250 3.86.3+0.030 0+0.755320 4.0Over 0.2500.350 6.38.9+0.040 0+1.03160 4.8Over 0.3500.450 8.911.4+0.050 0+1.37320 5.6Over 0.4500550 11.414+0.070 0+1.8BOver 0.5501.500 1438+0.080 0+2.0BOver 1.500 38BBAFor bars sheared from plate,width tolerances shall be as follows:BDepends on size and quantity ordered.Specified Thickness,in.mmWidth Tolerances,in.mmOverUnderOver 0.1000.1501161.61161.6Over 0.1500.2505642.05642.0Over 0.2500.3503322.43322.4Over 0.3500.4507642.87642.8Over 0.4500.550183.2183.2Over 0.5500.6505324.05324.0TABLE 8 Permissible Variations in Sectional Dimensions forCold-Finished Bars in Rounds,Hexagons,Octagons,andSquaresSpecified Size,in.mmPermissible Variation,in.AmmOverUnderRoundsOver121,incl13250.0020.050.0020.051112,excl25380.0025 0.060.0025 0.061124,inclB381000.0030.080.0030.08Hexagons,Octagons,and SquaresOver121,incl132500.004 0.10Over 12,excl255000.006 0.15Over 23,incl507500.008 0.20Over 37500.010 0.25AWhen it is necessary to heat treat or heat treat and pickle after cold finishing,because of special hardness or mechanical property requirements,tolerances aredouble those shown in the table.BFor permissible variations on sizes over 4 in.100 mm the manufacturer shouldbe consulted.B550/B550M 07(2012)3 13.Test Methods13.1 Tension TestsThe tension test shall be conducted inaccordance with Test Methods E8.Determine the yield strengthby the offset(0.2%)method.Determine the tensile propertiesusing a strain rate of 0.003 to 0.007 in./in.mm/mm/minthrough the yield strength.After the yield strength has beenexceeded,the cross-head speed may be increased to approxi-mately 0.05 in./in.mm/mm/min to failure.13.2 Chemical TestsThe chemical analyses shall be con-ducted by the standard techniques normally used by themanufacturer.14.Inspection14.1 The manufacturer shall inspect the material covered bythis specification prior to shipment.If so specified in thepurchase order,the purchaser or his representative may witnessthe testing and inspection of the material at the place ofmanufacture.In such cases the purchaser shall state in hispurchase order which tests he desires to witness.The manu-facturer shall give ample notice to the purchaser as to the timeand place of the designated tests.If the purchasers represen-tative does not present himself at the time agreed upon for thetesting,the manufacturer shall consider the requirement forpurchasers inspection at the place of manufacture to bewaived.14.2 The manufacturer shall afford the inspector represent-ing the purchaser,without charge,all reasonable facilities tosatisfy him that the material is being furnished in accordancewith this specification.This inspection shall be so conducted asnot to interfere unnecessarily with the operation of the works.15.Rejection15.1 Rejection for failure of the material to meet therequirements of this specification shall be reported to themanufacturer.Unless otherwise specified,rejected materialmay be returned to the manufacturer at the manufacturersexpense,unless the purchaser receives,within three weeks ofthe notice of rejection,other instructions for disposition.16.Certification16.1 A producer or supplier shall furnish the purchaser witha certificate that the material was manufactured,sampled,tested,and inspected in accordance with this specification andhas been found to meet the requirements.The certificate shallinclude a report of the test results.17.Referee17.1 In the event of disagreement between the manufacturerand the purchaser on the conformance of the material to therequirements of this specification or any special test specifiedby the purchaser,a mutually acceptable referee shall performthe tests in question.The results of the referees testing shall beused in determining conformance of the material to thisspecification.18.Product Marking18.1 Each bundle,box,or coil shall be marked or taggedlegibly and conspicuously with the purchase order or contractnumber,manufacturers private identification mark,the ASTMdesignation,the grade,size,ingot number,and gross,