1、Designation: A 836/A 836M 02 (Reapproved 2007)Standard Specification forTitanium-Stabilized Carbon Steel Forgings for Glass-LinedPiping and Pressure Vessel Service1This standard is issued under the fixed designation A 836/A 836M; the number immediately following the designation indicates the yearof
2、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. Scope1.1 This specification covers nonstandard as-forged fittings,v
3、alve components, and parts for glass-lined piping and pres-sure vessel service. Mechanical properties are certified on thebasis of test material subjected to heat treatments to simulateglass-coating operations.1.2 The values stated in either inch-pound units or SI unitsare to be regarded separately
4、as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation. The inch-pound units s
5、hall apply unless the “M”designation of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:2A 788/A 788M Specification for Steel Forgings, GeneralRequirementsA 961/A 961M Specification for Common Requirementsfor Steel Flanges, Forged Fittings, Valves, and Parts fo
6、rPiping Applications3. Ordering Information3.1 Product furnished to this specification shall conform tothe requirements of Specification A 961/A 961M, includingany supplementary requirements that are indicated in thepurchase order. Failure to comply with the requirements ofSpecification A 961/A 961M
7、 constitutes non-conformancewith this specification.3.2 It is the purchasers responsibility to specify in thepurchase order all ordering information necessary to purchasethe needed material. Examples of such information include butare not limited to the ordering information in SpecificationA 961/A 9
8、61M and the following:3.2.1 Supplementary requirements, and3.2.2 Additional requirements (see 10.1, 12.1, 12.2, and12.3).3.3 If the requirements of this specification are in conflictwith the requirements of Specification A 961/A 961M, therequirements of this specification shall prevail.4. Materials
9、and Manufacture4.1 The material shall be forged by hammering, pressing,rolling, extruding, or upsetting, such that the finished productwill be a forging as defined in the Terminology Section ofSpecification A 788/A 788M.4.2 When specified in the order, the manufacturer shallsubmit for approval by th
10、e purchaser a sketch showing theshape of the rough forging before machining.4.3 Forgings shall be protected against sudden or too rapidcooling from the rolling or forging while passing through thecritical range.4.4 Heat treatment of forgings is neither required norprohibited. However, the test mater
11、ial for qualifying theforging or the welding procedure shall be heat treated tosimulate glass-coating operations.5. Chemical Composition5.1 An analysis of each heat shall be made by the manufac-turer to determine the percentages of the elements specified inTable 1. The chemical composition thus dete
12、rmined shallconform to the requirements in Table 1.6. Mechanical Properties6.1 The test material shall conform to the requirements as totensile properties prescribed in Table 2.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the
13、direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved March 1, 2007. Published April 2007. Originallyapproved in 1984. Last previous edition approved in 2002
14、 as A 836/A 836M 02.2For 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 page onthe ASTM website.1Copyright ASTM International, 100 Barr H
15、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Number of Tests and Retests7.1 One tension test shall be made from each heat.7.2 If any test specimen is defectively machined, it may bediscarded and another specimen substituted.8. Retests8.1 When one or more representativ
16、e test specimens do notconform to specification requirements for the tested character-istic, only a single retest for each nonconforming characteristicmay be performed to establish product acceptability. Retestsshall be performed on twice the number of representativespecimens that were originally no
17、nconforming. When anyretest specimen does not conform to specification requirementsfor the characteristic in question, the lot represented by thatspecimen shall be rejected, or the test material shall be heattreated or reheat-treated in accordance with 4.4, and tested inaccordance with Sections 6 an
18、d 7.9. Test Specimens9.1 The test material to be used for qualifying the forgingsshall be heat treated with the forgings represented by the testmaterial, if the forgings are heat treated, then, the test materialshall be normalized three times from a minimum temperatureof 1550 F 845 C prior to testin
19、g. This heat treatmentsimulates glass-coating operations.10. Repair by Welding10.1 Approval by the purchaser shall be required prior toweld repair.10.2 The welded test plate used to qualify the procedureshall be normalized three times at 1550 F 845 C prior totesting to simulate glass-coating operati
20、ons.10.3 The composition of the weld deposits shall be similarto the base metal and in accordance with the procedurequalification for the applicable material. Welding shall beaccomplished with a weld procedure designed to produce lowhydrogen in the weldment. Short-circuit gas metal arc weldingis per
21、missible only with the approval of the purchaser.11. Rejection and Rehearing11.1 Samples representing material rejected by the pur-chaser shall be preserved until disposition of the claim has beenagreed upon by the manufacturer and the purchaser.12. Certification12.1 When specified in the purchase o
22、rder or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled, tested,and inspected in accordance with this specification and hasbeen found to meet the requirements. The specification desig-nation included on test reports shall
23、 include year of issue andrevision letter, if any.12.2 When specified in the purchase order or contract, areport of the test results shall be furnished.12.3 Upon request of the purchaser in the contract or order,a report of the test results and chemical analyses shall befurnished.13. Marking of Forg
24、ings13.1 Identification marks consisting of the manufacturerssymbol or name (Note), designation of service rating, thisspecification number, class, and size shall be legibly forged orstamped on each forging, and in such a position as not to injurethe usefulness of the forgings.13.2 Bar CodingIn addi
25、tion to the requirements in 13.1,bar coding is acceptable as a supplemental identificationmethod. The purchaser may specify in the order a specific barcoding system to be used. The bar coding system, if applied atthe discretion of the supplier, should be consistent with one ofthe published industry
26、standards for bar coding. If used onsmall parts, the bar code may be applied to the box or asubstantially applied tag.14. Keywords14.1 carbon; pipe fittings; piping applications; pressurecontaining parts; pressure vessel service; steel; steel flanges;steel forgings; steel valvesASTM International ta
27、kes 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 infringement of such rights, are entirely their own r
28、esponsibility.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 standard or for additional standardsand should be addre
29、ssed 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 views known to the ASTM Committee on Standards, at t
30、he 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 aboveaddress or at 610-832-9585 (p
31、hone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 1 Chemical RequirementsElement Composition, %Carbon, max 0.20Manganese, max 0.90Phosphorus, max 0.05Silicon, max 0.35Sulfur, max 0.05Titanium, min 43 carbon contentTitanium, max. 1.00TABLE 2 Tensile RequirementsClass ITensile strength, min, ksi MPa 55 380Yield strength,Amin, ksi MPa 25 175Elongation in 2 in. or 50 mm, min, % 22Reduction of area, min, % 35ADetermined by either the 0.2 % offset method or the 0.5 % extension-under-load method.A 836/A 836M 02 (2007)2
