1、Designation: B729 05 (Reapproved 2014)Standard Specification forSeamless UNS N08020, UNS N08026, and UNS N08024Nickel-Alloy Pipe and Tube1This standard is issued under the fixed designation B729; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers UNS N08020, UNS N08026,and UNS N08024 seamless, cold-worked or hot
3、finished pipeand tube intended for general corrosive service.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following safety
4、 hazards caveat pertains only to thetest methods portion, Section 10, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to become familiar with all hazards includingthose id
5、entified in the appropriate Material Safety data Sheet(MSDS) for this product/material as provided by themanufacturer, to establish appropriate safety and healthpractices, and determine the applicability of regulatory limi-tations prior to use.2. Referenced Documents2.1 ASTM Standards:2B829 Specific
6、ation for General Requirements for Nickel andNickel Alloys Seamless Pipe and TubeE8 Test Methods for Tension Testing of Metallic Materials3. General Requirement3.1 Material furnished under this specification shall con-form to the applicable requirements of Specification B829unless otherwise provided
7、 herein.4. Ordering Information4.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for the safe and satisfactoryperformance of material ordered under this specification.Examples of such requirements include, but are not limited to,the following:4.1.1 Alloy nam
8、e or UNS number.4.1.2 ASTM designation and year of issue.4.1.3 Finish.4.1.4 Dimensions:4.1.4.1 TubeSpecify outside diameter and the average orminimum wall thickness.4.1.4.2 PipeSpecify standard pipe size and schedule.4.1.4.3 Length, (cut to length or random).4.1.5 Quantity (feet or number of pieces)
9、.4.1.6 Hydrostatic Test or Nondestructive Electric TestSpecify type of test (see 7.2):4.1.6.1 Hydrostatic Pressure RequirementsSpecify testpressure if other than required by 10.1.4.1.7 EndsPlain ends cut and deburred will be furnished.If threaded ends or ends beveled for welding are desired, givedet
10、ails.4.1.8 CertificationState if certification is required.4.1.9 Samples for Product (Check) AnalysisState whethersamples for product (check) analysis should be furnished (see6.2).4.1.10 Purchaser InspectionIf the purchaser wishes towitness tests or inspection of material at the place ofmanufacture,
11、 the purchase order must so state, indicatingwhich tests or inspections are to be witnessed.5. Materials and Manufacture5.1 The product of UNS N08020 alloy shall be furnished inthe stabilized-annealed condition. The product of UNS N08026alloy shall be furnished in the solution-annealed condition. Th
12、eproduct of UNS N08024 alloy shall be furnished in theannealed condition.NOTE 1The recommended annealing temperatures all followed byquenching in water or rapidly cooling by other means are as follows: 1800to 1850F (982 to 1010C) for UNS N08020, 2050 to 2200F (1121 to1204C) for UNS N08026, and 1925
13、to 1975F (1052 to 1079C) for UNSN08024.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.07 on Refined Nickel and Cobalt and Their Alloys.Current edition approved Oct. 1, 2014. Published October 2014
14、. Originallyapproved in 1984. Last previous edition approved in 2009 as B729 05 (2009).DOI: 10.1520/B0729-05R14.2For 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
15、standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16. Chemical Composition6.1 The material shall conform to the composition limitsspecified in Table 1. One test is required for each lot
16、as definedin Specification B829.6.2 If a product analysis is performed by the purchaser, thematerial shall conform to the composition limits specified inTable 1 subject to the product analysis tolerances specified inTable 1 of Specification B829.7. Mechanical and Other Properties7.1 Mechanical Prope
17、rtiesThe material shall conform tothe mechanical property requirements specified in Table 2.7.2 Hydrostatic or Nondestructive Electric TestEach pipeand tube shall be subjected to either the hydrostatic test or thenondestructive electric test. The type of test to be used shall beat the option of the
18、manufacturer, unless otherwise specified inthe purchase order.8. Sampling8.1 Product (Check) Analysis shall be wholly the responsi-bility of the purchaser.9. Number of Tests9.1 Chemical AnalysisOne test per lot.9.2 Mechanical PropertiesOne test per lot.9.3 Hydrostatic or Nondestructive Electric Test
19、Each piecein each lot.10. Test Methods10.1 Hydrostatic Test:10.1.1 Each pipe or tube shall be hydrostatically tested, at apressure not to exceed 2500 psi (17 MPa) for nominal sizes 3in. (76 mm) and under, nor 2800 psi (19 MPa) for all nominalsizes over 3 in. (76 mm). The allowable fiber stress for m
20、aterialin the condition (temper) furnished is 20 000 psi (138 MPa),10.1.2 Visual examination is to be made when the materialis under pressure. The full length of material must be examinedfor leaks.10.1.3 When so agreed upon between the manufacturer andthe purchaser, pipe or tube may be tested to one
21、 and one-halftimes the allowable fiber stress given in 10.1.1.10.1.4 If any pipe or tube shows leak during hydrostatictesting, it shall be rejected. Any leaking areas may be cut outand the pipe retested as above.10.2 Nondestructive Electric TestEach pipe or tube shallbe examined with a nondestructiv
22、e electric test in accordancewith Specification B829.10.2.1 Test signals produced by imperfections such as thefollowing, may be judged as injurious or noninjurious, depend-ing on visual observation of their severity or the type of signalthey produce on the testing equipment, or both.10.2.1.1 Dinges,
23、10.2.1.2 Straightener marks,10.2.1.3 Scratches,10.2.1.4 Steel die stamps, and10.2.1.5 Stop marks.11. Keywords11.1 nickel-iron-chromium-molybdenum-copper-colum-bium; seamless pipe; seamless tube; UNS N08020; UNSN08024; UNS N08026TABLE 1 Chemical RequirementsElementComposition, %UNS N08026 UNS N08020
24、UNS N08024Carbon, max 0.03 0.07 0.03Manganese, max 1.00 2.00 1.00Phosphorus, max 0.03 0.045 0.035Sulfur, max 0.03 0.035 0.035Silicon, max 0.50 1.00 0.50Nickel 33.0037.20 32.0038.00 35.0040.00Chromium 22.0026.00 19.0021.00 22.5025.00Molybdenum 5.006.70 2.003.00 3.505.00Copper 2.004.00 3.004.00 0.501.
25、50Columbium (Nb) + tantalum . 8 carbon-1.00 0.150.35Nitrogen 0.100.16 . .Iron remainderAremainderAremainderAABy difference.TABLE 2 Mechanical Property RequirementsTensile Strength,minYield Strength,AminElongation in 2 in.(50.8 mm) or 4D min, %ksi MPa ksi MPa80 550 35 240 30.0AYield strength shall be
26、 determined by the offset method at 0.2 % limitingpermanent set in accordance with Test Methods E8.B729 05 (2014)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly adv
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29、f you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Indivi
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