1、Designation: B523/B523M 12 B523/B523M 12aStandard Specification forSeamless and Welded Zirconium and Zirconium AlloyTubes1This standard is issued under the fixed designation B523/B523M; the number immediately following the designation indicates the yearof original adoption or, in the case of revisio
2、n, 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 specification2 covers threetwo grades of zirconium and zirconium alloy seamless and welded tubes.1
3、.2 Unless a single unit is used, for example corrosion mass gain in mg/dm2, the values stated in either inch-pound or SI unitsare to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system mustbe used independently of the other. SI value
4、s cannot be mixed with inch-pound values.1.3 The following precautionary caveat pertains only to the test methods portion of this specification: This standard does notpurport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard
5、 toestablish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3A370 Test Methods and Definitions for Mechanical Testing of Steel ProductsB551/B551M Specification for Zirconium and Zirconium Alloy
6、Strip, Sheet, and PlateB614 Practice for Descaling and Cleaning Zirconium and Zirconium Alloy SurfacesE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE213 Practice for Ultrasonic Testing of Me
7、tal Pipe and TubingE426 Practice for Electromagnetic (Eddy-Current) Examination of Seamless and Welded Tubular Products, Titanium, AusteniticStainless Steel and Similar Alloys3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 annealed, nfor purposes of this specification “ anneal
8、ed” denotes material that exhibits a recrystallized grain structure.3.2 Lot Definitions:3.2.1 tubes, na lot shall consist of a material of the same size, shape, condition, and finish produced from the same ingot orpowder blend by the same reduction schedule and the same heat treatment parameters. Un
9、less otherwise agreed betweenmanufacturer and purchaser, a lot shall be limited to the product of an 8 h period for final continuous anneal, or to a single furnaceload for final batch anneal.4. Classification4.1 The tubes are furnished in threetwo grades as follows:4.1.1 Grade R60702Unalloyed zircon
10、ium.4.1.2 Grade R60704Zirconium-tin alloy.4.1.3 Grade R60705Zirconium-niobium alloy.1 This specification is under the jurisdiction of ASTM Committee B10 and is the direct responsibility of Subcommittee B10.02 on Zirconium and Hafnium.Current edition approved May 15, 2012Aug. 1, 2012. Published June
11、2012October 2012. Originally approved in 1970. Last previous edition approved in 20072012 asB523/B523M 07.B523/B523M 12. DOI: 10.1520/B0523_B0523M-12. 10.1520/B0523_B0523M-12A.2 For ASME Boiler and Pressure Vessel Code Applications, see related Specification SB523 in Section II of that Code.3 For re
12、ferenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to prov
13、ide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the
14、standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Ordering Information5.1 Orders for material under this specification should include the following information:5
15、.1.1 Quantity (weight or number of pieces, or both),5.1.2 Name of material (zirconium seamless or welded tube),5.1.3 Dimensions (diameter, wall thickness as either average or minimum, lengths),5.1.4 ASTM designation and year of issue,5.1.5 Grade number (see 4.1), and5.1.6 Additions to the specificat
16、ion, if required. See 6.3.1, 7.3, 10.1, 12.7.3, 14.1, and 15.1 for additional optional requirementsfor the purchase order.NOTE 1A typical ordering description is as follows: 1000 pieces of seamless zirconium tubes, 2 in. 50 mm in outside diameter by 0.06 in. 15 mmin average wall thickness by 10 ft 3
17、 m in length, vacuum annealed, ASTM B523/B523M - 01, Grade R60702.6. Materials and Manufacture6.1 Seamless tube shall be made by any seamless method that will yield a product meeting the requirements of this specification.6.2 Welded tube shall be made from sheet or strip meeting the requirements of
18、Specification B551/B551M by an automaticarc-welding process or other method of welding that will yield a product meeting the requirements of this specification. Filler metalshall not be used. Welded tubing shall be supplied as follows:6.2.1 As welded, or6.2.2 As welded and further reduced.6.2.3 Weld
19、s in grade R60705 shall be stress relief annealed within 14 days after welding to prevent delayed hydride cracking.The heat treatment shall be done as follows:6.2.3.1 The stress-relieving treatment shall consist of holding the fitting at a minimum temperature of 1100F 600C for notless than 12 h/in.
20、25 mm of the maximum thickness in a nonreducing atmosphere. The minimum time at this temperature is 15min. All stress-relieved parts shall be cleaned subsequently and shall be free of oxide scale contamination (see Practice B614).6.3 The tube shall be furnished annealed.6.3.1 Purchaser shall specify
21、 one of the following:(a) annealed in air(b) annealed in vacuum7. Chemical Composition7.1 The material shall conform to the requirements as to chemical composition prescribed in Table 1.7.2 The manufacturers ingot analysis shall be considered the chemical analysis for tubing, except for hydrogen and
22、 nitrogen,which shall be determined on the finished product.TABLE 1 Chemical RequirementsAElementComposition, %UNS Grade DesignationR60702 R60704 R60705R60702 R60704Zirconium + hafnium, minB 99.2 97.5 95.5Zirconium + hafnium, minB 99.2 97.5Hafnium, max 4.5 4.5 4.5Hafnium, max 4.5 4.5Iron + chromium
23、0.2 max 0.2 to 0.4 0.2 maxIron + chromium 0.2 max 0.2 to 0.4Tin . . . 1.0 to 2.0 . . .Tin . . . 1.0 to 2.0Hydrogen, max 0.005 0.005 0.005Hydrogen, max 0.005 0.005Nitrogen, max 0.025 0.025 0.025Nitrogen, max 0.025 0.025Carbon, max 0.05 0.05 0.05Carbon, max 0.05 0.05Niobium . . . . . . 2.0 to 3.0Niobi
24、um . . . . . .Oxygen, max 0.16 0.18 0.18Oxygen, max 0.16 0.18A By agreement between the purchaser and the manufacturer, analysis may berequired and limits established for elements and compounds not specified in thetable of chemical composition.B The value for zirconium + hafnium, min, is a warranted
25、 but not a measured value.B523/B523M 12a27.3 When requested by the purchaser and stated in the purchase order, a product analysis for any elements listed in Table 1 shallbe made on the finished product.7.3.1 The manufacturers analysis shall be considered as verified if the check analysis confirms th
26、e manufacturers reportedvalues within the tolerances prescribed in Table 2.8. Tensile Requirements8.1 The material, as represented by the test specimens, shall conform to the tensile properties prescribed in Table 3.9. Permissible Variation in Dimensions9.1 DiameterAt any point (cross section) along
27、 the length of the tube, the variation in outside diameter shall not exceed thoseprescribed in Table 4.9.2 LengthWhen tubes are ordered cut to length, the length shall be not less than that specified, but a variation of 18 in. 3.2mm will be permitted on tube up to 10 ft 3 m, inclusive. For lengths o
28、ver 10 ft, an additional over-tolerance of 18 in. 3.2 mmfor each 10 ft 3 m or fraction thereof shall be permissible up to 12 in. 13 mm, maximum.9.3 StraightnessThe tube shall be free of bends or kinks and the maximum uniform bow shall not exceed the values shownin Table 5.9.4 Squareness of CutThe an
29、gle of cut of the end of any tube up to 112 in. 40 mm in outside diameter may depart fromsquare not more than 0.016 in./in. mm/mm.TABLE 2 Permissible Variation in Product Analysis BetweenDifferent LaboratoriesElement Permissible Variation in ProductAnalysis, %Hydrogen 0.002Nitrogen 0.01Carbon 0.01Ha
30、fnium 0.1Iron + chromium 0.025Tin 0.05Niobium 0.05Oxygen 0.02TABLE 3 Tensile RequirementsUNS Grade DesignationR60702 R60704 R60705R60702 R60704Tensile strength,min, ksi MPa55 380 60 415 80 550Tensile strength,min, ksi MPa55 380 60 415Yield strength, min,ksi MPa30 205 35 240 55 380Yield strength, min
31、,ksi MPa30 205 35 240Elongation in 2 in.or 50 mm, min, %16 14 16Elongation in 2 in.or 50 mm, min, %16 14TABLE 4 Permissible Variations in Outside Dimensions Based on Individual MeasurementsOutside Diameter, in. mm Diameter Tolerance, in. mmA,B Permissible VariationsC in WallThickness, t, %Under 1 25
32、, excl 0.004 0.100 10Over 1 to 112 25 to 40, incl 0.005 0.125 10Over 112 to 2 40 to 50, incl 0.006 0.150 10Over 2 to 212 50 to 65, incl 0.007 0.180 10Over 212 to 312 65 to 90, incl 0.010 0.250 10A These permissible variations in outside diameter apply only to tubes as finished at the mill before sub
33、sequent swaging, expanding, bending, polishing, or other fabricatingoperations.B Ovality is the maximum and minimum outside diameter of a tube measured at any one cross section. If the measurement is made with a ring gage, the following formulashall apply: Ovality = specified OD tube + diameter tole
34、rance +0.002 in. .05 mm (length of ring gage, 1 in. 25 mm specified tube OD.C When minimum wall tubes are ordered, tolerances are all plus and shall be double the values shown.B523/B523M 12a310. Workmanship and Quality Level Requirements10.1 The finished tube shall be clean and free of foreign mater
35、ial, shall have smooth ends, free of burrs, and shall be free ofinjurious external and internal imperfections in accordance with standards of acceptability agreed upon between the manufacturerand the purchaser. Minor defects may be removed provided the dimensional tolerances of Table 4 are not excee
36、ded.11. Significance of Numerical Limits11.1 For the purpose of determining compliance with the specified limits for requirements of the properties listed in thefollowing table, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding methodsof Practice E
37、29.PropertyRounded Unit for Observedor Calculated ValueChemical composition, and tolerances(when expressed as decimals)nearest unit in the last right-hand placeof figures of the specified limitTensile strength and yield strength nearest 1000 psi 10 MPaElongation nearest 1 %12. Number of Tests and Re
38、tests12.1 One longitudinal tension test, see 13.1, shall be made from each lot.12.2 One chemistry test, see 7.2 and 13.8, for hydrogen and nitrogen shall be made from each lot of finished product.12.3 One flare test, see 13.6, shall be made from each lot.12.4 One reverse flattening test, see 13.7, s
39、hall be made from each lot of welded tubing.12.5 Welded Tubes:12.5.1 Welded tubes shall be nondestructively tested using the following procedures:12.5.1.1 Eddy Current Test, see 13.2.12.5.1.2 Ultrasonic Test, see 13.3.12.5.1.3 Hydrostatic Test, see 13.4, or pneumatic test, see 13.5.12.6 Seamless Tub
40、es:12.6.1 Seamless tubes shall be nondestructively tested using the following procedures:12.6.1.1 Ultrasonic Test, see 13.3.12.6.1.2 Eddy Current Test, see 13.2, or hydrostatic test, see 13.4, or pneumatic test, see 13.5.12.7 Retests:12.7.1 If any sample or specimen exhibits obvious surface contamin
41、ation or improper preparation disqualifying it as a trulyrepresentative sample, it shall be discarded and a new sample or specimen substituted.12.7.2 If the results of any tests of any lot do not conform to the requirements specified, retests shall be made on additional tubesof double the original n
42、umber from the same lot, each of which shall conform to the requirements specified.12.7.3 Retesting after failure of initial retests may be done only with the approval of the purchaser.13. Test Methods13.1 Tension TestsConduct the tension test in accordance with Test Methods E8. Determine the yield
43、strength by the offset(0.2 %) method. Determine the tensile properties using a strain rate of 0.003 to 0.007 in./in. mm/mm/min through the yieldstrength. After the yield strength has been exceeded, the cross-head speed may be increased to approximately 0.05 in./in.mm/mm/min to failure.13.2 Eddy Curr
44、ent Testing:13.2.1 Perform the nondestructive test in accordance with Practice E426, or a purchaser-approved procedure.13.2.1.1 Drilled HoleThe calibration tube shall contain three or more holes, equally spaced circumferentially around the tubeand longitudinally separated by a sufficient distance to
45、 allow distinct identification of the signal form each hole. The holes shallbe drilled radially and completely through the tube wall, with care being taken to avoid distortion of the tube while drilling. Theholes shall not be larger than 0.031 in. 0.8 mm in diameter. As an alternative, the producer
46、may choose to drill one hole and runTABLE 5 StraightnessLength, ft m Maximum Curvature Depthof ArcOver 3 to 6 0.9 to 1.85, incl 18 in. 3.2 mmOver 6 to 8 1.8 to 2.5, incl 316 in. 5 mmOver 8 to 10 2.5 to 3.0, incl 14 in. 6.4 mmOver 10 3.0 14 in./any 10 ft 2.1 mm/mB523/B523M 12a4the calibration standar
47、d through the test coil three times, rotating the tube approximately 120 each time. More passes with smallerangular increments may be used, provided testing of the full 360 of the coil is obtained. For welded tubing, if the weld is visible,one of the multiple holes or the single hole shall be drille
48、d in the weld.13.3 Ultrasonic Testing:13.3.1 For ultrasonic testing, the longitudinal calibration reference notches shall be at the option of the manufacturer, and beany one of the three common notch shapes in accordance with Practice E213. The depth of the notch shall not exceed 10 % of thespecifie
49、d wall thickness of the material or 0.004 in. 0.10 mm, whichever is greater.13.3.2 Set aside any tubes showing an indication in excess of that obtained from the calibration standard and subject them torework, retest, or rejection. A tube, therefore, set aside may be further examined for confirmation of the presence of a defect andmay be resubmitted for inspection by the same technique if no defect is found. Any tube may als
