1、Designation: B621 02 (Reapproved 2016)Standard Specification forNickel-Iron-Chromium-Molybdenum Alloy (UNS N08320)Rod1This standard is issued under the fixed designation B621; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r 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 specification2covers nickel-iron chromium-molybdenum alloy (UNS N08320)3rod for use in generalcorrosive serv
3、ice.1.2 The following products are covered under this specifi-cation:1.2.1 Rods516 to34 in. (7.94 to 19.05 mm) excl in diameter,hot or cold finished, solution annealed and pickled or mechani-cally descaled.1.2.2 Rods34 to 312 in. (19.05 to 88.9 mm) incl in diameter,hot or cold finished, solution ann
4、ealed, ground or turned.1.3 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.1.4 This standard does not purport to address all of thesafet
5、y concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateSafety Data Sheet (SDS) for this product/material as providedby the manufacturer, to establish appropriate safety and heal
6、thpractices, and determine the applicability of regulatory limi-tations prior to use.2. Referenced Documents2.1 ASTM Standards:4B880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys andCobalt AlloysE8 Test Methods for Tension Testing of Metallic Mate
7、rialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E1473 Test Methods for Chemical Analysis of Nickel, Co-balt and High-Temperature Alloys3. Terminology3.1 Definition
8、s of Terms Specific to This Standard:3.1.1 rod, na product of round solid section furnished instraight lengths.4. Ordering Information4.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for material ordered under thisspecification. Examples of such requirement
9、s include but arenot limited to the following:4.1.1 DimensionsNominal diameter and length. Theshortest useable multiple length shall be specified (Table 1).4.1.2 CertificationState if certification or a report of testresults is required (Section 15).4.1.3 Purchaser InspectionState which tests or ins
10、pec-tions are to be witnessed (Section 13).4.1.4 Samples for Product (Check) AnalysisState whethersamples shall be furnished (9.2.2).5. Chemical Composition5.1 The material shall conform to the composition limitsspecified in Table 2.5.2 If a product (check) analysis is made by the purchaser,the mate
11、rial shall conform to the requirements specified inTable 2 subject to the permissible tolerances in SpecificationB880.6. Mechanical Properties and Other Requirements6.1 The mechanical properties of the material at roomtemperature shall conform to those shown in Table 3.7. Dimensions, Mass and Permis
12、sible Variations7.1 DiameterThe permissible variations from the speci-fied diameter shall be as prescribed in Table 4.1This 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
13、 and Their Alloys.Current edition approved June 1, 2016. Published June 2016. Originallyapproved in 1977. Last previous edition approved in 2011 as B621 02 (2011).DOI: 10.1520/B0621-02R16.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SB-621 in Section II of that C
14、ode.3New designation established in accordance with ASTM E527 and SAE J1086,Recommended Practice for Numbering Metals and Alloys (UNS).4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inf
15、ormation, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17.2 Out of RoundnessThe permissible variation in round-ness shall be as prescribed in Table 4.7.3 Matching Allow
16、ancesWhen the surfaces of finishedmaterial are to be machined, the following allowances aresuggested for normal machining operations:7.3.1 As-finished (Annealed and Descaled)For diametersof516 to1116 in. (7.94 to 17.46 mm) incl, an allowance of116in. (1.59 mm) on the diameter should be made for fini
17、shmachining.7.4 Length:7.4.1 Unless multiple, nominal, or cut lengths are specified,random mill lengths shall be furnished.7.4.2 The permissible variations in length of multiple,nominal, or cut length rod shall be as prescribed in Table 1.Where rods are ordered in multiple lengths, an additional14 i
18、n.(6.35 mm) in length shall be allowed for each uncut multiplelength.7.5 Ends:7.5.1 Rods ordered to random or nominal lengths shall befurnished with either cropped or sawed ends.7.5.2 Rods ordered to cut lengths shall be furnished withsquare saw cut or machined ends.7.6 WeightThe material covered by
19、 this specification shallbe assumed to weigh 0.291 lb/in.3(8.05 g/cm3).7.7 StraightnessThe maximum curvature (depth of cord)shall not exceed 0.050 in. multiplied by the length of the cordin feet (0.04 mm multiplied by the length in centimetres).8. Workmanship, Finish, and Appearance8.1 The material
20、shall be uniform in quality and condition,smooth, and free of injurious imperfections.9. Sampling9.1 Lots for Chemical Analysis and Mechanical Testing:9.1.1 A lot for chemical analysis shall consist of one heat.9.1.2 A lot of bar for mechanical testing shall be defined asthe material from one heat i
21、n the same condition and specifieddiameter.9.2 Sampling for Chemical Analysis:9.2.1 A representative sample shall be obtained from eachheat during pouring or subsequent processing.9.2.2 Product (check) analysis shall be wholly the respon-sibility of the purchaser.9.3 Sampling for Mechanical Testing:
22、9.3.1 Arepresentative sample shall be taken from each lot offinished material.10. Number of Tests and Retests10.1 Chemical AnalysisOne test per heat.10.2 Tension TestsOne test per lot.10.3 RetestsIf the specimen used in the mechanical test ofany lot fails to meet the specified requirements, two addi
23、tionalspecimens shall be taken from different sample pieces andtested. The results of the tests on both of these specimens shallmeet the specified requirements.11. Specimen Preparation11.1 Tension test specimens shall be taken from materialafter final heat-treatment and tested in the direction of fa
24、bri-cation.11.2 Tension test specimens shall be any of the standard orsubsized specimens shown in Test Methods E8.11.3 In the event of a disagreement, the referee specimenshall be the largest possible round specimen shown in TestMethods E8.12. Test Methods12.1 The chemical composition and mechanical
25、 propertiesof the material as enumerated in this specification shall bedetermined, in case of disagreement, in accordance with thefollowing ASTM methods:12.1.1 Chemical AnalysisTest Methods E1473.12.1.2 Tension TestTest Methods E8.12.1.3 Determining Significant PlacesPractice E29.12.2 For purposes o
26、f determining compliance with thelimits in this specification, an observed value or a calculatedvalue shall be rounded in accordance with the rounding methodof Practice E29:TABLE 1 Permissible Variations in Length of RodsRandom mill lengths 2 to 12 ft (610 to 3660 mm) longwith not more than 25 weigh
27、t % under4 ft (1.22 m).Multiple lengths Furnished in multiples of aspecified unit length, within thelength limits indicated above.For each multiple, an allowance of14 in. (6.35mm) shall be made for cutting, unlessotherwise specified. At themanufacturers option, individualspecified unit lengths may b
28、e furnished.Nominal lengths Specified nominal lengths havinga range of not less than 2 ft (610mm) with no short lengths allowed.Cut lengths A specified length to which allrods shall be cut with a permissiblevariation of +18 in. (3.17 mm) - 0.TABLE 2 Chemical RequirementsElement Composition Limits,%N
29、ickel 25.027.0Iron remainderAChromium 21.023.0Molybdenum 4.06.0Manganese, max 2.5Carbon, max 0.05Titanium, min 4 carbonSilicon, max 1.00Phosphorus, max 0.04Sulfur, max 0.03ASee 12.1.1.TABLE 3 Mechanical Property RequirementsTensile Strength, min,psi (MPa)Yield Strength (0.2 %Offset), min, psi (MPa)E
30、longation in 2 in.(50.8) or 4DA,min,%75 000 (517) 28 000 (193) 35AD refers to the diameter of the tension specimen.B621 02 (2016)2RequirementsRounded Unit for Observed orCalculated ValueChemical composition andtolerancenearest unit in the last right-hand placeof figures of the specified limitTensile
31、 strength and yield strength nearest 1000 psi (7 MPa)Elongation nearest 1 %13. Inspection13.1 Inspection of the material shall be made as agreed uponby the manufacturer and the purchaser as part of the purchasecontract.14. Rejection and Rehearing14.1 Material tested by the purchaser that fails to co
32、nform tothe requirements of this specification may be rejected. Rejec-tion should be reported to the producer or supplier promptlyand in writing. In case of dissatisfaction with the results of thetest, the producer or supplier may make claim for a rehearing.15. Certification15.1 When specified in th
33、e purchase order or contract, amanufacturers certification shall be furnished to the purchaserstating that material has been manufactured, tested, and in-spected in accordance with this specification, and that the testresults on representative samples meet specification require-ments. When specified
34、 in the purchase order or contract, areport of the test results shall be made.16. Product Marking16.1 Each piece of material12 in. (12.7 mm) or over indiameter shall be marked with the specification number, alloy,heat number, manufacturers identification, and size. Themarkings shall have no deleteri
35、ous effect on the material or itsperformance and shall be sufficiently stable to withstandnormal handling.16.2 Each bundle or shipping container shall be markedwith the name of the material; this specification number; alloy;the size; gross, tare, and net weight; consignor and consigneeaddress; contr
36、act or order number; and such other informationas may be defined in the contract or order.17. Keywords17.1 rod; UNS N08320APPENDIX(Nonmandatory Information)X1. HEAT TREATMENTX1.1 Proper heat treatment during or subsequent to fabrica-tion is necessary for optimum performance, and the manufac-turer sh
37、all be consulted for details.ASTM 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 advised that determination of the validity of any such patent rights, and the riskof inf
38、ringement 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 andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this stand
39、ard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your vi
40、ews 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 contact
41、ing ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 6
42、46-2600; http:/ 4 Permissible Variations in Diameter and Out-of-Roundness of Finished RodsSpecified Diameter, in. (mm)Permissible Variations, in. (mm)DiameterOut of Roundness, maxPlus MinusHot-Finished, Annealed, and Descaled Rods516 to716 (7.9411.11), incl 0.012 (0.30) 0.012 (0.30) 0.018 (0.46)Over716 to58 (11.1115.87), incl 0.014 (0.36) 0.014 (0.36) 0.020 (0.51)Over58 to34 (15.8719.05), excl 0.016 (0.41) 0.016 (0.41) 0.024 (0.61)Hot-Finished, Annealed, and Ground or Turned Rods34 to 312 (19.0588.9), incl 0.010 (0.25) 0 0.008 (0.20)B621 02 (2016)3
