1、Designation: B550/B550M 07 (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 ye
2、ar 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
3、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-pou
4、nd 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
5、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. Terminolo
6、gy3.1 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
7、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
8、, 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 t
9、han 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
10、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 Addit
11、ions to the specification as required.NOTE 1A 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 w
12、ith conventional fabrication methods and equipmentfound in primary ferrous and nonferrous metal plants.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.Curre
13、nt 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 reference
14、d 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 Con
15、shohocken, PA 19428-2959, United States.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 2.7. Chemical Composition7.1 The material shall conform to the requirements as tochemical composition prescribed in
16、 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
17、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 requireme
18、ntsfor 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 ba
19、r 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
20、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 Thic
21、kness 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
22、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.
23、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.
24、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 accept
25、ability 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 shallTABLE 1 Product Sect
26、ions and SizeProduct Section SizeBars: Hot-finished round, squares, octagons, and hexagons14 in. 6.4 mm and over in diameter or sizeHot-finished flats14 in. 6.4 mm to 10 in. 250 mm, incl, in width, and18in. 3.2 mm and over in thicknessCold-finished rounds, squares, octagons, hexagons, andshapesOver1
27、2 in. 13 mm in diameter or sizeACold-finished flats38 in. 9.5 mm and over in width,Band18 in. 3.2 mmand over in thicknessCWire: Cold-finished rounds, squares, octagons, hexagons, andshapes12 in. 13 mm and under in diameter or sizeCold-finished flats116 in. 1.6 mm to under38 in. 9.5 mm in width, and0
28、.010 in. .25 mm to under316 in. 4.8 mm inthicknessASizes12 in. 13 mm and under are wire when in coils, and cut wire when finished in straight lengths.BWidths less than38 in. 9.5 mm and thicknesses less than316 in. 4.8 mm are generally described as flat wire.CThickness18 in. 3.2 mm to under316 in. 4.
29、8 mm can be cold-rolled strip as well as bar.TABLE 2 ConditionForm ConditionBars hot finishedhot finished and annealedcold finishedcold finished and annealedWire cold finishedcold finished and annealedB550/B550M 07 (2012)2be rounded as indicated in accordance with the roundingmethods of Practice E29
30、.PropertyRounded Unit for Observed orCalculated ValueChemical composition and tolerances(when expressed as decimals)nearest unit in the last right-handplace of figures of the specified limitTensile strength and yield strength nearest 1000 psi (10 MPa)Elongation nearest 1 %12. Number of Tests and Ret
31、ests12.1 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 imprope
32、r 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 c
33、onform to therequirements specified.13. Test Methods13.1 Tension TestsThe tension test shall be conducted inaccordance with Test Methods E8. Determine the yield strengthTABLE 3 Chemical RequirementsAElementComposition, %Grades R60702 Grades R60704 Grades R60705Zirconium + hafnium, min 99.2 97.5 95.5
34、Hafnium, max 4.5 4.5 4.5Iron + chromium 0.2 max 0.2 to 0.4 0.2 maxTin . 1.0 to 2.0 .Hydrogen, max 0.005 0.005 0.005Nitrogen, max 0.025 0.025 0.025Carbon, max 0.05 0.05 0.05Niobium . . . . . . 2.0 to 3.0Oxygen, max 0.16 0.18 0.18ABy agreement between the purchaser and the manufacturer, analysis may b
35、e required and limits established for elements and compounds not specified in the tableof chemical composition.TABLE 4 Permissible Variation in Check Analysis BetweenDifferent LaboratoriesElementPermissible Variation inProduct Analysis, %Hydrogen 0.002Nitrogen 0.01Carbon 0.01Hafnium 0.1Iron + chromi
36、um 0.025Tin 0.05Niobium 0.05Oxygen 0.02TABLE 5 Tensile RequirementsAGradesR60702 R60704 R60705Tensile Strength, min, ksi (MPa) 55 380 60 415 80 550Yield Strength, min, ksi (MPa) 30 205 35 240 55 380Elongation in 2 in. or 50 mm min, %B16 14 16AFor bar only.BWhen a sub-size specimen is used, the gage
37、length shall be as specified inTest Methods 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 +0.75 0.025 0.64Over 0.5001.000 1325 +0.050 0 +1.3
38、 0.040 1Over 1.0002.000 2550 +0.070 0 +1.8 0.060 1.5Over 2.000-4.000 50100 +0.150 0 +3.8 0.080 2Over 4.0006.000 100150 +0.250 0 +6.4 0.100 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 +0.518 0 3.
39、2Over 0.1500.250 3.86.3 +0.030 0 +0.75532 0 4.0Over 0.2500.350 6.38.9 +0.040 0 +1.0316 0 4.8Over 0.3500.450 8.911.4 +0.050 0 +1.3732 0 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
40、on size and quantity ordered.Specified Thickness, in.mmWidth Tolerances, in. mmOver UnderOver 0.1000.150116 1.6116 1.6Over 0.1500.250564 2.0564 2.0Over 0.2500.350332 2.4332 2.4Over 0.3500.450764 2.8764 2.8Over 0.4500.55018 3.218 3.2Over 0.5500.650532 4.0532 4.0TABLE 8 Permissible Variations in Secti
41、onal Dimensions forCold-Finished Bars in Rounds, Hexagons, Octagons, andSquaresSpecified Size, in. mmPermissible Variation, in.AmmOver UnderRoundsOver12 1, incl 1325 0.002 0.05 0.002 0.051112 , excl 2538 0.0025 0.06 0.0025 0.06112 4, inclB38100 0.003 0.08 0.003 0.08Hexagons, Octagons, and SquaresOve
42、r12 1, incl 1325 0 0.004 0.10Over 12, excl 2550 0 0.006 0.15Over 23, incl 5075 0 0.008 0.20Over 3 75 0 0.010 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
43、table.BFor permissible variations on sizes over 4 in. 100 mm the manufacturershould be consulted.B550/B550M 07 (2012)3by 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 beenexce
44、eded, 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 speci
45、fication 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 sh
46、all 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.
47、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 o
48、f 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
