1、Designation: B726 02 (Reapproved 2016)Standard Specification forNickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-SiliconAlloy (UNS N06333) Welded Tube1This standard is issued under the fixed designation B726; the number immediately following the designation indicates the year oforiginal adoption or,
2、in the case 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 alloy UNS N06333 in the formof welded tube intended for
3、 heat-resisting applications andgeneral 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 This standard does not
4、purport to address all of thesafety 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 est
5、ablish appropriate safety and healthpractices, and determine the applicability of regulatory limi-tations prior to use.2. Referenced Documents2.1 ASTM Standards:2B718 Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Plate,Sheet, and StripB751 Specification
6、 for General Requirements for Nickel andNickel Alloy Welded Tube3. General Requirement3.1 Material furnished under this specification shall con-form to the applicable requirements of Specification B751unless otherwise provided herein.4. Ordering Information4.1 It is the responsibility of the purchas
7、er to specify allrequirements that are necessary for material ordered to thisspecification. Examples of such requirements include, but arenot limited to, the following:4.1.1 Alloy or UNS number,4.1.2 ASTM designation and date of issue,4.1.3 Dimensions (outside or inside diameter and nominal-wall thi
8、ckness),4.1.4 Length (specific or random),4.1.5 Quantity (feet or number of pieces),4.1.6 CertificationState if certification is required,4.1.7 Samples for Product (Check) AnalysisState whethersamples should be furnished, and4.1.8 Purchaser InspectionIf purchaser wishes to witnesstests or inspection
9、 of material at place of manufacture, thepurchase order must so state indicating which tests or inspec-tions are to be witnessed.5. Materials and Manufacture5.1 The tube shall be made from flat-rolled alloy conform-ing to Specification B718, by an automatic welding processwith no addition of filler
10、metal.5.2 Tube shall be furnished annealed after welding, withoxide removed. When the final heat treatment is performed ina protective atmosphere, descaling is not necessary.6. Chemical Composition6.1 The material shall conform to the requirements as tochemical composition specified in Table 1.6.2 I
11、f a product (check) analysis is performed by thepurchaser, the material shall conform to the product (check)analysis variations in Specification B751.7. Mechanical and Other Requirements7.1 The mechanical properties of the material at roomtemperature shall conform to those shown in Tables 2-4.7.2 On
12、e test is required for each lot as defined in Specifi-cation B751.7.3 Flattening TestA flattening test shall be made on eachend of one tube per lot. Superficial ruptures resulting fromsurface imperfections shall not be cause for rejection.7.4 Flange TestA flange test shall be made on each end ofone
13、tube per lot.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 June 1, 2016. Published June 2016. Originallyapproved in 1983.
14、 Last previous edition approved in 2011 as B726 02 (2011).DOI: 10.1520/B0726-02R16.2For 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 standards Document Summary pa
15、ge onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17.5 Nondestructive Test Requirements:7.5.1 Tubes shall be subjected to a pressure test or nonde-structive electric test at the manufacturers option.7.5.1.1 Leak Tes
16、tHydrostatic or pneumatic (air underwa-ter).7.5.1.2 Electric TestEddy current or ultrasonic.8. Keywords8.1 UNS N06333; welded tubeASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned inthis standard. Users of this standard a
17、re expressly advised that determination of the validity of any such patent rights, and the riskof 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 andif not
18、 revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard 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 y
19、ou may attend. If 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,Unite
20、d States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting 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 al
21、so be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Chemical RequirementsElement Composition Limits, %Carbon 0.10 maxManganese 2.0 maxPhosphorus 0.03Sulfur 0.03Silicon 1.5 maxChromium 24.0 to 27.0Nickel 44.0 to 48.0Molybdenum 2.5 to
22、4.0Cobalt 2.5 to 4.0Tungsten 2.5 to 4.0IronAremainderAElement may be determined arithmetically by difference.TABLE 2 Mechanical PropertiesTensileStrength,min, psi(MPa)Yield Strength,0.2 % offset,min, psi (MPa)Elongationin 2 in. or50 mm, or4D,min,%HardnessA80 000(551)35 000(241)30 75 to 95HRBAHardnes
23、s values are informative only and not to be construed as the basis foracceptance.TABLE 3 Permissible Variations in Outside Diameter,Ovality, and Wall Thickness of Welded TubeNOTE 1(1) These permissible variations in outside diameter applyonly to tubes as finished at the mill before subsequent swagin
24、g, expanding,bending, polishing, or other fabricating operations.(2) Wall thickness variation shall not exceed 15 % of the nominal wallthickness for tube under12-in. (12.7-mm) outside diameter, and 10 % ofnominal wall thickness for tube of outside diameter12 in. (12.7 mm) andover.(3) For ovality val
25、ues, the tolerance for average outside diameter at anyone cross section does not exceed the outside diameter tolerance for theapplicable outside diameter.Outside Diameter, in.(mm)Permissible Variations in OutsideDiameter, in. (mm)Plus MinusUnder 1 (25.4) 0.004 (0.10) 0.004 (0.10)1 (25.4) to 112 (38.
26、1), incl 0.006 (0.15) 0.006 (0.15)Over 112 (38.1) to 2(50.8), excl0.008 (0.20) 0.008 (0.20)2 (50.8) to 212 (63.5), excl 0.010 (0.25) 0.010 (0.25)212 (63.5) to 3 (76.2), excl 0.012 (0.30) 0.012 (0.30)3 (76.2) to 4 (102), incl 0.015 (0.38) 0.015 (0.38)Over 4 (102) to 5 (127), incl 0.015 (0.38) 0.025 (
27、0.63)TABLE 4 Permissible Variations in LengthAOutside Diameter,in. (mm)Cut Length, in. (mm)Over UnderUnder 2 (50.8)2 (50.8) and over18 (3.2)316 (4.8)00AThese permissible variations in length apply to tube before bending. They applyto cut lengths up to and including 24 ft (7.3 m). For lengths over 24 ft (7.3 m), andadditional overtolerance of18 in. (3.2 mm) for each 10 ft (3.0 m) or fraction thereofshall be permissible up to a maximum additional overtolerance of12 in. (12.7 mm).B726 02 (2016)2
