1、Designation: B 726 02 (Reapproved 2006)Standard Specification forNickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-SiliconAlloy (UNS N06333) Welded Tube1This standard is issued under the fixed designation B 726; 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 (e) 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
3、for heat-resisting applications andgeneral corrosive service.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 The following precautionary statement pertains only tothe test methods portion, Section 13, of this sp
4、ecification: 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 identified in the appropriate Material Safety Data Sheet(MSDS) for this product/ma
5、terial as provided by the manufac-turer, to establish appropriate safety and health practices, anddetermine the applicability of regulatory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:2B 718 Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N0
6、6333) Plate,Sheet, and StripB 751 Specification 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 B 751unless otherwise provided herein.4. Ordering Inform
7、ation4.1 It is the responsibility of the 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
8、(outside or inside diameter and nominal-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 InspectionI
9、f purchaser wishes to witnesstests or inspection 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 B 718, by an aut
10、omatic welding processwith no addition of 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
11、tochemical composition specified in Table 1.6.2 If a product (check) analysis is performed by thepurchaser, the material shall conform to the product (check)analysis variations in Specification B 751.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys a
12、nd is the direct responsibility of SubcommitteeB02.07 on Refined Nickel and Cobalt and Their Alloys.Current edition approved Dec. 1, 2006. Published December 2006. Originallyapproved in 1983. Last previous edition approved in 2002 as B 726 02.2For referenced ASTM standards, visit the ASTM website, w
13、ww.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsElement Composition Limits, %Carbon 0.10 maxManganese 2.0 maxPhosphorus 0.03Sulfur 0.03Si
14、licon 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 4.0IronAremainderAElement may be determined arithmetically by difference.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Me
15、chanical and Other Requirements7.1 The mechanical properties of the material at roomtemperature shall conform to those shown in Tables 2-4.7.2 One test is required for each lot as defined in Specifi-cation B 751.7.3 Flattening TestA flattening test shall be made on eachend of one tube per lot. Super
16、ficial ruptures resulting fromsurface imperfections shall not be cause for rejection.7.4 Flange TestA flange test shall be made on each end ofone tube per lot.7.5 Nondestructive Test Requirements:7.5.1 Tubes shall be subjected to a pressure test or nonde-structive electric test at the manufacturers
17、option.7.5.1.1 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. U
18、sers of this standard 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 eve
19、ry five years 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 techn
20、ical committee, 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 Conshohock
21、en, PA 19428-2959,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).TABLE 2 Mechanical Propertie
22、sTensileStrength,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 be construed as the basis foracceptance.TABLE 3 Permissible Variations in Outside Diameter,Ovali
23、ty, 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 other fabricating operations. (2) Wall thicknessvariation shall not exceed 615 % of the nominal wall
24、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 outside diameter at any one crosssection does not exceed the outside diameter tolerance for the applica
25、bleoutside 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)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
26、.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 in LengthAOutside Diameter,in. (mm)Cut Length, in. (mm)Over UnderUnder 2 (50.8)2 (50.8) and over18
27、 (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).B 726 02 (2006)2
