1、Designation: B 550/B 550M 07Standard Specification forZirconium and Zirconium Alloy Bar and Wire1This standard is issued under the fixed designation B 550/B 550M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last rev
2、ision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) 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 exa
3、mple 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
4、 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 pr
5、acticesand 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 Definit
6、ions 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 r
7、eduction 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
8、cold worked semi-finished solid section product whose cross sectional area isequal to or less than 16 in.2(10 323 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 ore
9、qual 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
10、 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 B 550/B 550M-07, and5.1.5 Addition
11、s to the specification as required.NOTE 1A typical ordering description is as follows: 1000 lb (500 kg)zirconium cold drawn bar, 0.35 in. (10 mm) in diameter by 10 ft (3 m) inlength, ASTM B 550 - 01, Grade R60702.6. Materials and Manufacture6.1 Bar and wire covered by this specification shall beform
12、ed 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
13、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, 2007. Published May 2007. Originallyapproved in 1971. Last previous edition approved in 2002 as B 550/B 550M 02.2For ASME
14、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 stand
15、ards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Chemical Composition7.1 The material shall conform to the requirements as tochemical composition prescribed in Table 3.7.2 The manufactu
16、rers 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
17、 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 properti
18、es, 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
19、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.TABLE 1 Product Sections and SizeProduct Section SizeBars: Hot-fini
20、shed 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, andshapesOver12 in. (13 mm) in diameter or sizeACold-
21、finished flats38 in. (9.5 mm) and over in width,Band18 in. (3.2 mm)and 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, and0.010 in. (.25 mm) to under3
22、16 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. (4.8 mm) can be c
23、old-rolled strip as well as bar.TABLE 2 ConditionForm ConditionBars hot finishedhot finished and annealedcold finishedcold finished and annealedWire cold finishedcold finished and annealedTABLE 3 Chemical RequirementsAElementComposition, %Grades R60702 Grades R60704 Grades R60705Zirconium + hafnium,
24、 min 99.2 97.5 95.5Hafnium, 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 manufactu
25、rer, analysis may be 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 0.01Hafni
26、um 0.1Iron + chromium 0.025Tin 0.05Niobium 0.05Oxygen 0.02TABLE 5 Tensile RequirementsAGradesR60702 R60704 R60705Tensile Strength, min, ksi (MPa) 55 (380) 60 (415) 80 (550)Yield Strength, min, ksi (MPa) 30 (205) 35 (240) 55 (380)Elongation in 2 in. or 50 mm min, %B16 14 16AFor bar only.BWhen a sub-s
27、ize specimen is used, the gage length shall be as specified inTest Methods E8for the specimen.B 550/B 550M 0729.1.3 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
28、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, Pe
29、rmissible 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 tol
30、erances prescribed in Tables 6 and 7, shall befurnished with one of the following finishes as designated onthe purchase order:TABLE 6 Dimensional Tolerances for Hot-Finished Rounds,Squares, Octagons, and HexagonsSpecified Size, in. (mm)Variation inSize, in. (mm)Out of Round,Out of Square, in. (mm)Up
31、0.500 (13) +0.030 0 (+0.75) 0.025 (0.64)Over 0.5001.000 (1325) +0.050 0 (+1.3) 0.040 (1)Over 1.0002.000 (2550) +0.070 0 (+1.8) 0.060 (1.5)Over 2.000-4.000 (50100) +0.150 0 (+3.8) 0.080 (2)Over 4.0006.000 (100150) +0.250 0 (+6.4) 0.100 (2.5)TABLE 7 Dimensional Tolerances in Hot-Rolled Flat BarsThickn
32、ess, in. (mm)Variation inThickness, in. (mm)Variation in Width,Ain. (mm)Up0.150 (3.8) +0.020 0 (+0.5)18 0 (3.2)Over 0.1500.250 (3.86.3) +0.030 0 (+0.75)532 0 (4.0)Over 0.2500.350 (6.38.9) +0.040 0 (+1.0)316 0 (4.8)Over 0.3500.450 (8.911.4) +0.050 0 (+1.3)732 0 (5.6)Over 0.4500550 (11.414) +0.070 0 (
33、+1.8)BOver 0.5501.500 (1438) +0.080 0 (+2.0)BOver 1.500 (38)BBAFor bars sheared from plate, width tolerances shall be as follows:BDepends on size and quantity ordered.Specified Thickness, in.(mm)Width Tolerances, in. (mm)Over UnderOver 0.1000.150116 (1.6)116 (1.6)Over 0.1500.250564 (2.0)564 (2.0)Ove
34、r 0.2500.350332 (2.4)332 (2.4)Over 0.3500.450764 (2.8)764 (2.8)Over 0.4500.55018 (3.2)18 (3.2)Over 0.5500.650532 (4.0)532 (4.0)TABLE 8 Permissible Variations in Sectional Dimensions forCold-Finished Bars in Rounds, Hexagons, Octagons, andSquaresSpecified Size, in. (mm)Permissible Variation, in.A(mm)
35、Over UnderRoundsOver12 1, incl (1325) 0.002 (0.05) 0.002 (0.05)1112 , excl (2538) 0.0025 (0.06) 0.0025 (0.06)112 4, inclB(38100) 0.003 (0.08) 0.003 (0.08)Hexagons, Octagons, and SquaresOver12 1, incl (1325) 0 0.004 (0.10)Over 12, excl (2550) 0 0.006 (0.15)Over 23, incl (5075) 0 0.008 (0.20)Over 3 (7
36、5) 0 0.010 (0.25)AWhen 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 manufacturershould be consult
37、ed.TABLE 9 Permissible Variations in Width and Thickness forCold-Finished Bars in FlatsWidth, in. (mm)Permissible Variations in Width forThicknesses Given, Over and Under,in.A(mm)14 (6.4) and under Over14 (6.4)Width38 1, incl 0.004 (0.10) 0.002 (0.05)Over 12, incl 0.006 (0.15) 0.003 (0.08)Over 23, i
38、ncl 0.008 (0.20) 0.004 (0.10)Over 3412 , inclB0.010 (0.25) 0.005 (0.13)ThicknessThickness, in. (mm)Permissible Variations in ThicknessOver and Under, in.A(mm)18 1, incl (3.2-25) 0.002 (0.05)Over 12, incl (2550) 0.003 (0.08)Over 23, incl (5075) 0.004 (0.10)Over 3412 , inclB(75115) 0.005 (0.13)AWhen i
39、t is necessary to heat treat and pickle after cold finishing, because ofhardness or mechanical property requirements, tolerances are double thoseshown in the table.BFor permissible variations on widths and thicknesses over 412 in. (115 mm) themanufacturer should be consulted.TABLE 10 Permissible Var
40、iations in Sectional Dimensions forWireASpecified Size, in. (mm)Permissible Variation, in. (mm)Over UnderDrawn, Centerless Ground, Centerless Ground and PolishedRound Wire, and Square WireB12 (13) 0.002 (0.05) 0.002 (0.05)Under12 516 , incl (1318) 0.0015 (0.04) 0.0015 (0.04)Under516 0.044, incl (81.
41、1) 0.001 (0.025) 0.001 (0.025)Under 0.0440.033, incl (1.10.8) 0.0008 (0.020) 0.0008 (0.020)Under 0.0330.024, incl (0.80.6) 0.0005 (0.013) 0.0005 (0.013)Under 0.0240.012, incl (0.60.3) 0.0004 (0.010) 0.0004 (0.010)Under 0.0120.008, incl (0.30.2) 0.0003 (0.008) 0.0003 (0.008)Under 0.0080.007, incl (0.
42、21.8) 0.0002 (0.005) 0.0002 (0.005)Under 0.0070.00476, incl (0.180.12) 0.0002 (0.005) 0.0002 (0.005)Under 0.004760.003, incl (0.120.08) 0.0001 (0.003) 0.0001 (0.003)Drawn Wire in Hexagons and OctagonsC12 0 0.004 (0.10)Under12 516 , incl 0 0.003 (0.08)Under516 18 , incl 0 0.002 (0.05)Wire for Which t
43、he Final Operation is a Surface Treatment to Remove Scale orDrawing Lubricant12 0.004 (0.10) 0.004 (0.10)Under12 516 , incl 0.003 (0.08) 0.003 (0.08)Under516 0.044, incl 0.002 (0.05) 0.002 (0.05)Under 0.0440.033, incl 0.0013 (0.03) 0.0013 (0.03)Under 0.0330.024, incl 0.0008 (0.02) 0.0008 (0.02)AManu
44、facturers should be consulted for all tolerances for half-round, oval, andhalf-oval wires.BThe maximum out-of-round tolerance for round wire is one half of the total sizetolerance shown in the above table.CDimensions are across flats.B 550/B 550M 07310.1.1 Not descaled,10.1.2 Mechanically descaled,1
45、0.1.3 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 ro
46、lled, 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 betwe
47、en 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 th
48、e roundingmethods of Practice E29.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 neare
49、st 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
