1、Designation: B752 06 (Reapproved 2011)1Standard Specification forCastings, Zirconium-Base, Corrosion Resistant, for GeneralApplication1This standard is issued under the fixed designation B752; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、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.1NOTEMethod E 142 was removed editorially from Section 2 and X1.1.2 was corrected in April 2011.1. Scope1.1
3、This specification covers zirconium and zirconium-alloycastings for general corrosion-resistant and industrial applica-tions.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 informat
4、ion onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A802/A802M Practice for Steel Castings, Surface Accep-tance Standards, Visual ExaminationE8 Test Methods for Tension Testing of Metallic MaterialsE10 Test Method for Brinell Hardness of Metallic MaterialsE18 Test Meth
5、ods for Rockwell Hardness of Metallic Ma-terialsE23 Test Methods for Notched Bar Impact Testing ofMetallic MaterialsE94 Guide for Radiographic ExaminationE165 Practice for Liquid Penetrant Examination for GeneralIndustryE446 Reference Radiographs for Steel Castings Up to 2 in.(50.8 mm) in Thickness3
6、. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 pour, nshall consist of all material melted and castat one time.3.2 Lot Definitions:3.2.1 castings, na lot shall consist of all castings producedfrom the same pour.4. Ordering Information4.1 Orders for castings to this specificati
7、on shall include thefollowing, as required to describe the requirements adequately.4.1.1 Description of the castings by pattern number ordrawing (dimensional tolerances shall be included on thecasting drawing),4.1.2 Quantity,4.1.3 Grade Designation (see Table 1),4.1.4 Options in the specification, a
8、nd4.1.5 Supplementary requirements desired, including thestandards of acceptance.5. Materials and Manufacture5.1 Material for this specification shall be melted by con-ventional processes used for reactive metals. Typical methodsinclude the consumable electrode and inductoslag meltingprocesses.6. Ch
9、emical Composition6.1 Pour AnalysisAn analysis of each pour shall be madeby the producer from a sample such as a casting or test bar thatis representative of the pour. The chemical composition deter-mined shall conform to the requirements specified for therelevant grade in Table 1.6.1.1 The elements
10、 listed in Table 1 are intentional alloyingadditions of elements which are inherent to the manufacture ofprimary zirconium, zirconium sponge, mill product or castings.6.1.1.1 Elements other than those listed in Table 1 aredeemed to be capable of occurring in the grades listed in Table1 by and only b
11、y way of unregulated or unanalyzed scrapadditions to the pour. Therefore, pour analysis for elements notlisted in Table 1 shall be considered to be in excess of the intentof this specification.6.2 When agreed upon by producer and purchaser andrequested by the purchaser in his written purchase order,
12、chemical analysis shall be completed for specific residualelements not listed in this specification.1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommittee B10.02 on Zirconium and Hafnium.Current
13、edition approved April 1, 2011. Published April 2011. Originallyapproved in 1985. Last previous edition approved in 2006 as B752 06. DOI:10.1520/B0752-06R11E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
14、 ASTMStandards volume information, 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.6.3 Product AnalysisA product analysis may be made bythe purchaser on a representative
15、 casting from any lot. Becauseof the possibility of oxygen or other interstitial contamination,samples for oxygen, carbon, hydrogen, and nitrogen analysisshall be taken no closer than14 in. (6.3 mm) to a cast surfaceexcept that castings too thin for this shall be analyzed onrepresentative material.
16、The chemical composition determinedshall conform to the analysis in Table 1 within the checkanalysis variations shown in Table 2 or shall be subject torejection by the purchaser.6.4 In the event of disagreement between the manufacturerand the purchaser on the conformance of the material to therequir
17、ements of this specification or any special test specifiedby the purchase, a mutually acceptable referee shall performthe tests in question. The results of the referees testing shall beused in determining conformance of the material to thisspecification.7. Heat Treatment7.1 Unless otherwise specifie
18、d in the contract, all castingswill be supplied in the as-cast condition except when post-weldheat treatment is required.7.2 If post-weld heat treatment is required, it shall consist ofa stress relief performed at 1050 6 50F (565 6 25C) for aminimum of12 h at temperature plus an additional12 hattemp
19、erature per inch of thickness for section sizes greater than1 in. (25 mm). After heat treatment, the castings should becooled in air or in the furnace to ambient temperature unlessotherwise agreed upon between the purchaser and producer.8. Workmanship, Finish and Appearance8.1 All castings shall be
20、made in a workmanlike manner andshall conform to the dimensions in drawings furnished by thepurchaser before manufacturing is started. If the pattern issupplied by the purchaser, the dimensions of the casting shallbe as predicted by the pattern.8.2 The surface of the casting shall be free of adherin
21、g moldmaterial, scale, cracks, and hot tears as determined by visualexamination. Other surface discontinuities shall meet the visualacceptance standards specified in the order. Practice A802/A802M or other visual standards may be used to defineacceptable surface discontinuities and finish. Unaccepta
22、blesurface discontinuities shall be removed, and their removalverified by visual examination of the resultant cavities.9. Repair by Welding9.1 If repairs are required, these shall be made using awelding procedure and operators certified to quality require-ments established by the producer. The proce
23、dures developedshall be consistent with standard practices recommended forreactive metal alloys. The producer shall maintain documenta-tion on procedure and welder qualifications. Procedure modi-fications or special arrangements shall be as agreed uponbetween the producer and purchaser.9.2 Weld repa
24、irs shall be considered major in the case of acasting that has leaked on a hydrostatic test or when the depthof the cavity after preparation for repair exceeds 20 % of theactual wall thickness or 1 in. (25 mm), whichever is smaller, orwhen the surface area of the cavity exceeds approximately 10in.2(
25、6500 mm2). All other weld repairs shall be consideredminor. Major and minor repairs shall be subject to the samequality standards as are used to inspect the castings.9.3 The composition of the deposited weld metal shall bewithin the chemical requirements for each grade established inTable 1.9.4 All
26、castings with major weld repairs shall be stressrelieved after repair in accordance with 7.2. Stress relief afterminor repairs is not required for grades 702C and 704C exceptby agreement between the producer and the purchaser. Grade705C must be stress relieved after any weld repair.10. Inspection10.
27、1 The producer shall afford the purchasers inspector allreasonable facilities necessary to satisfy him that the materialis being produced and furnished in accordance with thisspecification. Foundry inspection by the purchaser shall notinterfere unnecessarily with the producers operations.All testsan
28、d inspections, with the exception of product analysis (6.3),shall be made at the place of manufacture, testing, or inspectionunless otherwise agreed upon.11. Rejection11.1 Any rejection based on test reports shall be reported tothe producer within 60 days from the receipt of the test reportsby the p
29、urchaser.TABLE 1 Chemical RequirementsAGrade Designation,Composition, %702C 704C 705CZirconium and hafnium,min.98.8 97.1 95.1Hafnium, maxIron and chro-mium, max4.50.34.50.34.50.3Hydrogen, max 0.005 0.005 0.005Nitrogen, max 0.03 0.03 0.03Carbon, max 0.1 0.1 0.1Oxygen, max 0.25 0.3 0.3Phosphorus, max
30、0.01 0.01 0.01Tin . 1.0 to 2.0 .Niobium . . 2.0 to 3.0ABy agreement between the purchaser and the producer, analysis may berequired and limits established for elements and compounds not specified in thistable.TABLE 2 Check Analysis TolerancesElementMaximumof Range,Weight, %PermissibleVariationin Che
31、ckAnalysisNitrogen 0.03 +0.006Carbon 0.10 +0.02Hydrogen 0.005 +0.001Iron and chromium 0.30 +0.06Oxygen 0.25 +0.05Hafnium 4.50 +0.50Phosphorus 0.010 +0.003Tin 1.0 to 2.0 60.02Niobium 2.0 to 3.0 60.015Residuals 0.10 +0.02B752 06 (2011)1211.2 Material that shows unacceptable discontinuities asdetermine
32、d by the acceptance standards specified on the order,subsequent to acceptance at the producers works, will berejected, and the producer shall be notified within 60 days, oras otherwise agreed upon.12. Product Marking12.1 Unless otherwise specified, the following shall apply:12.1.1 Castings shall be
33、marked for material identificationwith the ASTM specification number (B752) and grade sym-bol, that is, 702C, 704C, or 705C.12.1.2 The producers name or identification mark and thepattern number shall be cast or stamped using low stressstamps on all castings. Small size castings may be such thatmark
34、ing must be limited consistent with the available area.12.1.3 The marking of lot numbers on individual castingsshall be agreed upon between the producer and the purchaser.12.1.4 Marking shall be in such a position as not to injurethe usefulness of the casting.13. Keywords13.1 castings; corrosion-res
35、istant; zirconium; zirconiumalloysSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall be applied only when specified by the purchaser. Details of thesupplementary requirements shall be agreed upon between the producer and purchaser. The specifiedtests shall be performed by the producer prior
36、to shipment of the castings.S1. Radiographic ExaminationS1.1 The castings shall be examined for internal defects bymeans of X rays or gamma rays. The procedure shall be inaccordance with Guide E94 and types and degrees of discon-tinuities shall be judged by Reference Radiographs E446. Theextent of e
37、xamination and basis for acceptance shall be agreedupon between the producer and purchaser.S2. Liquid Penetrant ExaminationS2.1 The castings shall be examined for surface disconti-nuities by means of liquid penetrant examination. The exami-nation shall be in accordance with Test Method E165. Areas t
38、obe inspected, methods and types of liquid penetrants to be used,developing procedure, and basis for acceptance shall be agreedupon between the producer and purchaser.S3. Examination of Weld PreparationS3.1 Cavities prepared for welding as a result of surfacediscontinuities, such as cracks, open por
39、osity, and so forth shallbe examined by means of liquid penetrant examination in orderto verify removal of such discontinuities.S3.2 Weld repairs that are made to eliminate discontinuitiesthat are detected by radiography shall be re-radiographed toverify that unacceptable discontinuities have been r
40、emoved.S4. CertificationS4.1 A test report shall be furnished. The test report shallcontain the results of the actual chemical analysis and othertests specified by the purchaser.S4.2 Each test report shall be signed by an authorized agentof the seller or producer.S4.3 The test report shall be furnis
41、hed within 5 days ofshipment of the castings.S5. Prior Approval of Major Weld RepairsS5.1 Major weld repairs as defined and agreed upon be-tween the producer and purchaser shall be subject to the priorapproval of the purchaser.S6. Tension TestS6.1 Tensile properties shall be determined on materialre
42、presenting each pour. Properties shall be determined in theas-cast condition unless the purchase order requires the prop-erties be determined in the final condition after all heattreatments (including isostatic pressing) have been completedor unless otherwise specified in the purchase order. The res
43、ultsshall conform to the requirements specified in Table S6.1.S6.2 Test bars may be obtained from special test blocks castfor that purpose or cut from castings processed with a lot.S6.3 Tensile tests shall be made in accordance with therequirements of Test Methods E8. Tensile properties shall bedete
44、rmined using a strain rate of 0.003 to 0.007 in./in./min(0.005 to 0.007 mm/mm/min) through the yield strength.S6.4 If any test specimen shows defective machining ordevelops flaws, it may be discarded and another specimensubstituted from the same pour.TABLE S6.1 Tensile and Hardness RequirementsGrade
45、TensileStrength,minYieldStrength, 0.2 %Offset, minElongationin1in.(51 mm)length, min, %Hardness,HB, maxHardness,Rockwell,maxksi MPa ksi MPa702C 55 (380) 40 (276) 12 210 B96704C 60 (413) 40 (276) 10 235 B99705C 70 (483) 50 (345) 12 235 B99B752 06 (2011)13S7. Hardness TestS7.1 Hardness shall be determ
46、ined on each lot. Hardnessshall be determined in the as-cast condition unless the purchaseorder requires the hardness be determined in the final conditionafter all heat treatments (including isostatic pressing) havebeen completed or unless otherwise specified in the purchaseorder. The results shall
47、conform to the requirements specifiedin Table S6.1.S7.2 Hardness shall be determined on a sample cast for thatpurpose, or on a casting randomly selected from a lot. If acasting is used for a hardness sample, indentations shall bemade in a surface that will not be subsequently machined.Hardness value
48、s reported shall be representative of the basemetal of the castings and not of any surface contaminationcaused by mold-metal interactions.S7.3 Hardness tests shall be made in accordance with therequirements of Test Methods E10 or E18.S8. Hot Isostatic Pressing (HIP)S8.1 Hot Isostatic Pressing (HIP)
49、shall be used to improveas-cast properties or remove internal defects, or both. Tempera-ture, time at temperature, and atmosphere shall be agreed uponbetween supplier and purchaser.S8.2 HIP may be substituted for required thermal treatmentprovided all requirements for that treatment are met andtemperatures detrimental to the material properties are notreached.S9. Charpy Impact TestS9.1 Charpy impact test properties shall be determined onmaterial representing each lot. Three Charpy V-notch speci-mens shall be made from a test piece and tested in accordancewith Te
