ASTM B729–99

Designation: B 729 – 9900 An American National Standard Standard Specification for Seamless UNS N08020, UNS N08026, and UNS N08024 Nickel-Alloy Pipe and Tube1 This standard is issued under the fixed designation B 729; the number immediately following the designation indicates the year of 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 (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This specification covers UNS N08020, UNS N08026, and UNS N08024 seamless, cold-worked or hot finished pipe and tube intended for general corrosive service. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 The following safety hazards caveat pertains only to the test methods portion, Section 10, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: B 829 Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube2 1 This specification is under the jurisdiction of ASTM Committee B-2 B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined Nickel and Cobalt and Their Alloys. Current edition approved May Oct. 10, 1999. 2000. Published June 1999. November 2000. Originally published as B 729 – 84. Last previous edition B 729 – 959. 1 This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because it 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 version of the 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 States. E 8 Test Methods for Tension Testing of Metallic Materials3 3. General Requirement 3.1 Material furnished under this specification shall conform to the applicable requirements of Specification B 829 unless otherwise provided herein. 4. Ordering Information 4.1 OIt is the rdesponsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory performance of materials ordered under this specification sh. Examplles of such requirements include, but are not limited to, the following information: following: 4.1.1 Alloy name or UNS number. 4.1.2 ASTM designation and year of issue. 4.1.3 Finish. 4.1.4 Dimensions: 4.1.4.1 Tube—Specify outside diameter and the average or minimum wall thickness. 4.1.4.2 Pipe—Specify standard pipe size and schedule. 4.1.4.3 Length, (cut to length or random). 4.1.5 Quantity (feet or number of pieces). 4.1.6 Nondestructive Testing (see 7.2): 4.1.6.1 Pressure Requirements—Test pressure if other than required by 10.1. 4.1.6.2 Specify if an electric test is to be performed (see 7.2). 4.1.7 Ends—Plain ends cut and deburred will be furnished. If threaded ends or ends beveled for welding are desired, give details. 4.1.8 Certification—State if certification is required. 4.1.9 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished (see 6.2). 4.1.10 Purchaser Inspection—If the purchaser wishes to witness tests or inspection of material at the place of manufacture, the purchase order must so state, indicating which tests or inspections are to be witnessed. 5. Materials and Manufacture 5.1 The product of UNS N08020 alloy shall be furnished in the stabilized-annealed condition. The product of UNS N08026 alloy shall be furnished in the solution-annealed condition. The product of UNS N08024 alloy shall be furnished in the annealed condition. NOTE 1—The recommended annealing temperatures all followed by quenching in water or rapidly cooling by other means are as follows: 1800 to 1850°F (982 to 1010°C) for UNS N08020, 2050 to 2200°F (1121 to 1204°C) for UNS N08026, and 1925 to 1975°F (1052 to 1079°C) for UNS N08024. 6. Chemical Composition 6.1 The material shall conform to the composition limits specified in Table 1. One test is required for each lot as defined in Specification B 829. 6.2 If a product analysis is performed by the purchaser, the material shall conform to the composition limits specified in Table 1 subject to the product analysis tolerances specified in Table 1 of Specification B 829. 2 Annual Book of ASTM Standards, Vol 02.04. 3 Annual Book of ASTM Standards, Vol 03.01. TABLE 1 Chemical Requirements Element Composition, % UNS N08026 UNS N08020 UNS N08024 Carbon, max 0.03 0.07 0.03 Manganese, max 1.00 2.00 1.00 Phosphorus, max 0.03 0.045 0.035 Sulfur, max 0.03 0.035 0.035 Silicon, max 0.50 1.00 0.50 Nickel 33.00–37.20 32.00–38.00 35.00–40.00 Chromium 22.00–26.00 19.00–21.00 22.50–25.00 Molybdenum 5.00–6.70 2.00–3.00 3.50–5.00 Copper 2.00–4.00 3.00–4.00 0.50–1.50 Columbium (Nb) + tantalum ... 8 3 carbon-1.00 0.15–0.35 Nitrogen 0.10–0.16 ... ... Iron remainderA remainderA remainderA ABy difference. B 729 – 9900 2 7. Mechanical and Other Properties 7.1 Mechanical Properties—The material shall conform to the mechanical property requirements specified in Table 2. 7.2 Pressure and Nondestructive Electric Test—Each pipe and tube shall be subjected to either a pressure test or the nondestructive electric test at the manufacturer’s option. The purchaser may specify which test is to be used. 7.2.1 Any leaking areas may be cut out and the pipe retested as above. 7.2.2 Test signals produced by imperfections such as the following, may be judged as injurious or noninjurious, depending on visual observation of their severity or the type of signal they produce on the testing equipment used, or both. 7.2.2.1 Dinges, 7.2.2.2 Straightener marks, 7.2.2.3 Scratches, 7.2.2.4 Steel die stamps, and 7.2.2.5 Stop marks. 8. Sampling 8.1 Product (Check) Analysis shall be wholly the responsibility of the purchaser. 9. Number of Tests 9.1 Chemical Analysis—One test per lot. 9.2 Mechanical Properties—One test per lot. 9.3 Nondestructive Test—Each piece in each lot. 10. Test Methods 10.1 Hydrostatic Test: 10.1.1 Each pipe or tube shall be hydrostatically tested, at a pressure not to exceed 2500 psi (17 MPa) for nominal sizes 3 in. (76 mm) and under, nor 2800 psi (19 MPa) for all nominal sizes over 3 in. (76 mm). The allowable fiber stress for material in the condition (temper) furnished is 20 000 psi (138 MPa), 10.1.2 Visual examination is to be made when the material is under pressure. The full length of material must be examined for leaks. 10.1.3 When so agreed upon between the manufacturer and the purchaser, pipe or tube may be tested to one and one-half times the allowable fiber stress given in 10.1.1. 11. Keywords 11.1 nickel-iron-chromium-molybdenum-copper-columbium; seamless pipe; seamless tube; UNS N08020; UNS N08024; UNS N08026 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make 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. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org). TABLE 2 Mechanical Property Requirements Tensile Strength, min Yield Strength,A min Elongation in 2 in.(50.8 mm) or 4D min, %ksi MPa ksi MPa 80 550 35 240 30.0 AYield strength shall be determined by the offset method at 0.2 % limiting permanent set in accordance with Test Methods E 8. B 729 – 9900 3 主营业务范围：ASTMASTMASTMASTM、NASNASNASNAS、NASMNASMNASMNASM、MILMILMILMIL、ISOISOISOISO、ENENENEN、 DINDINDINDIN、JISJISJISJIS等技术 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 翻译；技术资料翻译；NADCAPNADCAPNADCAPNADCAP认证 标准资料翻译；国外技术标准中文版优惠低价代购等。 业务 QQQQQQQQ：2298175560229817556022981755602298175560 专业 专注于技术翻译 诚信 实惠 物超所值的服务可靠的质量保证