1、Designation: B 752 06Standard Specification forCastings, Zirconium-Base, Corrosion Resistant, for GeneralApplication1This standard is issued under the fixed designation B 752; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r 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 zirconium and zirconium-alloycastings for general corrosion-resistant and industrial a
3、pplica-tions.1.2 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system shallbe used independently of the other. Combining
4、 values from thetwo systems may result in nonconformance with the specifi-cation.2. Referenced Documents2.1 ASTM Standards:2A 802/A 802M Practice for Steel Castings, Surface Accep-tance Standards, Visual ExaminationE8 Test Methods for Tension Testing of Metallic MaterialsE10 Test Method for Brinell
5、Hardness of Metallic Materi-alsE18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic MaterialsE23 Test Methods for Notched Bar Impact Testing ofMetallic MaterialsE94 Guide for Radiographic ExaminationE 142 Method for Controlling Quality of RadiographicTesting3E 165 Test
6、 Method for Liquid Penetrant ExaminationE 446 Reference Radiographs for Steel Castings Up to 2 in.51 mm in Thickness3. 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
7、consist of all castings producedfrom the same pour.4. Ordering Information4.1 Orders for castings to this specification 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 inclu
8、ded on thecasting drawing),4.1.2 Quantity,4.1.3 Grade Designation (see Table 1),4.1.4 Options in the specification, and4.1.5 Supplementary requirements desired, including thestandards of acceptance.5. Materials and Manufacture5.1 Material for this specification shall be melted by con-ventional proce
9、sses used for reactive metals. Typical methodsinclude the consumable electrode and inductoslag meltingprocesses.6. Chemical 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 co
10、mposition deter-mined shall conform to the requirements specified for therelevant grade in Table 1.6.1.1 The elements listed in Table 1 are intentional alloyingadditions of elements which are inherent to the manufacture ofprimary zirconium, zirconium sponge, mill product or castings.1This specificat
11、ion 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 edition approved March 1, 2006. Published March 2006. Originallyapproved in 1985. Last previous edition approved in
12、2001 as B 752 01.2For 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.3Withdrawn.1Copyright ASTM International, 10
13、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 by way of unregulated or unanalyzed scrapadditions to the pour. Therefore, pour analys
14、is 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,chemical analysis shall be completed for specific residualelements not listed in this
15、 specification.6.3 Product Analysis A product analysis may be made bythe purchaser on a representative 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)
16、 to a cast surfaceexcept that castings too thin for this shall be analyzed onrepresentative material. 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
17、disagreement between the manufacturerand the purchaser on the conformance of the material to therequirements 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 deter
18、mining conformance of the material to thisspecification.7. Heat Treatment7.1 Unless otherwise specified 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 reli
19、ef performed at 1050 6 50F (565 6 25C) for aminimum of12 h at temperature plus an additional12 hattemperature 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 u
20、pon between the purchaser and producer.8. Workmanship, Finish, and Appearance8.1 All castings shall be 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
21、the casting shallbe as predicted by the pattern.8.2 The surface of the casting shall be free of adhering moldmaterial, scale, cracks, and hot tears as determined by visualexamination. Other surface discontinuities shall meet the visualacceptance standards specified in the order. Practice A 802/A 802
22、M or other visual standards may be used to defineacceptable surface discontinuities and finish. Unacceptablesurface 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 a
23、welding procedure and operators certified to quality require-ments established by the producer. The procedures developedshall be consistent with standard practices recommended forreactive metal alloys. The producer shall maintain documenta-tion on procedure and welder qualifications. Procedure modi-
24、fications or special arrangements shall be as agreed uponbetween the producer and purchaser.9.2 Weld repairs 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
25、 1 in. (25 mm), whichever is smaller, orwhen the surface area of the cavity exceeds approximately 10in.2(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 de
26、posited weld metal shall bewithin the chemical requirements for each grade established inTable 1.9.4 All 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
27、the producer and the purchaser. Grade705C must be stress relieved after any weld repair.10. Inspection10.1 The producer shall afford the purchasers inspector allreasonable facilities necessary to satisfy him that the materialis being produced and furnished in accordance with thisspecification. Found
28、ry inspection by the purchaser shall notTABLE 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, m
29、ax 0.25 0.3 0.3Phosphorus, max 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,Weig
30、ht, %PermissibleVariationin CheckAnalysisNitrogen 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 + 0.02B752062interfere unnecessarily with the pr
31、oducers operations.All testsand 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 recei
32、pt of the test reportsby the purchaser.11.2 Material that shows unacceptable discontinuities asdetermined 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
33、.12. Product Marking12.1 Unless otherwise specified, the following shall apply:12.1.1 Castings shall be marked for material identificationwith the ASTM specification number (B 752) and gradesymbol, that is, 702C, 704C, or 705C.12.1.2 The producers name or identification mark and thepattern number sh
34、all be cast or stamped using low stressstamps on all castings. Small size castings may be such thatmarking 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
35、 such a position as not to injurethe usefulness of the casting.13. Keywords13.1 castings; corrosion-resistant; zirconium; zirconiumalloysSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall be applied only when specified by the purchaser. Details of thesupplementary requirements shall be agree
36、d upon between the producer and purchaser. The specifiedtests shall be performed by the producer prior 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 E94a
37、nd Method E 142, and types anddegrees of discontinuities shall be judged by Reference Radio-graphs E 446. The extent of examination and basis for accep-tance shall be agreed upon between the producer and pur-chaser.S2. Liquid Penetrant ExaminationS2.1 The castings shall be examined for surface disco
38、nti-nuities by means of liquid penetrant examination. The exami-nation shall be in accordance with Test Method E 165.Areas tobe 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. Exami
39、nation of Weld PreparationS3.1 Cavities prepared for welding as a result of surfacediscontinuities, such as cracks, open porosity, 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 dis
40、continuitiesthat are detected by radiography shall be re-radiographed toverify that unacceptable discontinuities have been removed.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 purchase
41、r.S4.2 Each test report shall be signed by an authorized agentof the seller or producer.S4.3 The test report shall be furnished 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 shal
42、l be subject to the priorapproval of the purchaser.S6. Tension TestS6.1 Tensile properties shall be determined on materialrepresenting 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 h
43、eattreatments (including isostatic pressing) have been completedor unless otherwise specified in the purchase order. The resultsshall 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
44、 lot.TABLE S6.1 Tensile and Hardness RequirementsGradeTensileStrength,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 B99B752063S
45、6.3 Tensile tests shall be made in accordance with therequirements of Test Methods E8. Tensile properties shall bedetermined 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
46、 may be discarded and another specimensubstituted from the same pour.S7. Hardness TestS7.1 Hardness shall be determined 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 (incl
47、uding isostatic pressing) havebeen completed or unless otherwise specified in the purchaseorder. The results shall 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
48、for a hardness sample, indentations shall bemade in a surface that will not be subsequently machined.Hardness values 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
49、 with therequirements of Test Methods E10orE18.S8. Hot Isostatic Pressing (HIP)S8.1 Hot Isostatic Pressing (HIP) 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 representin
