1、Designation: B726 02 (Reapproved 2011)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 appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufactur
5、er, to establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations 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 Speci
6、fication for General Requirements for Nickeland Nickel 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
7、 purchaser 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-
8、wall thickness),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 in
9、spection 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
10、 filler 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
11、 1.6.2 If 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-
12、4.7.2 One 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 en
13、d ofone tube per lot.7.5 Nondestructive Test Requirements: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, 2011. Pub
14、lished June 2011. Originallyapproved in 1983. Last previous edition approved in 2006 as B726 02 (2006).DOI: 10.1520/B0726-02R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informatio
15、n, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.5.1 Tubes shall be subjected to a pressure test or nonde-structive electric test at the manufacturers option.7.5.1.1
16、 Leak TestHydrostatic 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 mentionedin this standard. Users of this s
17、tandard are 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
18、andif not 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
19、, which you 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 19428-2
20、959,United 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 standa
21、rd may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 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 4.0Cobalt 2.5 to 4.0Tungsten 2.5 to 4.0I
22、ronAremainderAElement 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 95HRBAHardness values are informative only and not to
23、 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 swaging, expanding,bending, polishing, or othe
24、r fabricating operations. (2) Wall thicknessvariation shall not exceed 615 % of the nominal wall thickness for tubeunder12-in. (12.7-mm) outside diameter, and 610 % of nominal wallthickness for tube of outside diameter12 in. (12.7 mm) and over. (3) Forovality values, the tolerance for average outsid
25、e diameter at any one crosssection does not exceed the outside diameter tolerance for the applicableoutside 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 (38.1), incl 0.006 (0.15) 0.006 (0.15)Ove
26、r 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 (0.63)TABLE 4 Permissible Variations i
27、n 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. Theyapply to cut lengths up to and including 24 ft (7.3 m). For lengths over 24 ft (7.3 m),and additional overtolerance of18 in. (3.2 mm) for each 10 ft (3.0 m) or fractionthereof shall be permissible up to a maximum additional overtolerance of12 in.(12.7 mm).B726 02 (2011)2
