1、Designation: B 595 95 (Reapproved 2006)Standard Specification forSintered Aluminum Structural Parts1This standard is issued under the fixed designation B 595; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. 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 sintered aluminum structuralparts made primarily from aluminum powders to which con-trolled amounts of
3、master alloys or elemental copper, magne-sium, and silicon have been added by blending.1.2 This specification covers the following variables:1.2.1 CompositionDepending upon levels of copper, mag-nesium, and silicon content, two grades, and1.2.2 DensityType.1.3 Parts ordered to this specification wil
4、l be in one of thefollowing conditions:1.3.1 As-sintered,1.3.2 As-repressed for additional density, or1.3.3 All other conditions plus heat treated.1.4 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.2. Referenced Documents2.1 A
5、STM Standards:2B 243 Terminology of Powder MetallurgyB 328 Test Method for Density, Oil Content, and Intercon-nected Porosity of Sintered Metal Structural Parts andOil-Impregnated BearingsE8 Test Methods for Tension Testing of Metallic Materials3. Terminology3.1 DefinitionsDefinitions of powder meta
6、llurgy termscan be found in Terminology B 243. Additional descriptiveinformation is available in the Related Material Section ofVolume 02.05 of the Annual Book of ASTM Standards.4. Ordering Information4.1 Orders for material to this specification shall include thefollowing information:4.1.1 Dimensio
7、ns (see 9.1),4.1.2 Chemical composition (see 6.1),4.1.3 Density (see 7.1),4.1.4 State of heat treatment,4.1.5 Mechanical property requirements (see 8.1), and4.1.6 Certification (see 14.1).5. Materials and Manufacture5.1 Structural parts shall be made by molding and sinteringmetal powders to produce
8、finished parts conforming to therequirements of this specification.6. Chemical Composition6.1 The material shall conform to the requirements of Table1.6.2 The chemical analysis shall be made in accordance withthe methods prescribed in the latest edition of the Annual Bookof ASTM Standards, Vol 03.05
9、, or any other approved methodagreed upon between the manufacturer and the purchaser.7. Density7.1 The parts shall conform to the density range prescribedin Table 2.7.2 The density shall be measured in accordance with TestMethod B 328.7.3 If the density does not vary more than 0.1 g/cm3fromone secti
10、on of the structural part to any other section, theoverall density shall fall within the limits prescribed in Table 2.7.4 If the density varies more than 0.1 g/cm3from onesection of the structural part to any other section, the manu-facturer and the purchaser shall agree upon a critical section ofth
11、e part where the stresses are the highest. The density of thiscritical section rather than the average density shall fall withinthe limits prescribed in Table 2.8. Mechanical Properties8.1 The manufacturer and the purchaser shall agree onqualification tests for the determination of mechanical proper
12、-ties.8.2 These tests shall be performed on production parts.8.3 These tests shall be determined after consideration ofthe function of the part.8.4 The limits and sampling plan shall be agreed uponbetween the manufacturer and purchaser.1This specification is under the jurisdiction of ASTM Committee
13、B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.05 on Structural Parts.Current edition approved April 1, 2006. Published April 2006. Originallyapproved in 1973. Last previous edition approved in 2000 as B 595 95 (2000).2For referenced ASTM standard
14、s, 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 Harbor Drive, PO Box C700, West Conshohocken, PA 1
15、9428-2959, United States.8.5 All shipments of parts subsequent to the establishmentof testing conditions shall conform to the limits agreed upon.NOTE 1The mechanical properties in tension and compression thatmay be expected from standard specimens molded to size are given inAppendix X1 of this speci
16、fication.9. Dimensions and Tolerances9.1 Permissible variations in dimensions shall be within thelimits specified on the drawings describing the structural partsaccompanying the order or shall be within the limits specifiedin the order.10. Workmanship, Finish, and Appearance10.1 Structural parts sha
17、ll be uniform in composition.10.2 When parts are cut or fractured, the exposed surfaceshall be of uniform appearance.11. Sampling11.1 LotUnless otherwise specified, a lot shall consist ofparts of the same form and dimensions made from powders ofthe same composition molded and sintered under the same
18、conditions and submitted for inspection at one time.11.2 Chemical AnalysisIf required by purchase agree-ment, at least one sample for chemical analysis shall be takenfrom each lot. A representative sample of chips may beobtained by dry milling, drilling or crushing at least two pieceswith clean dry
19、tools without lubrication. In order to obtainoil-free chips, the parts selected for test shall have the oilextracted in accordance with Test Method B 328, if necessary.11.3 Mechanical TestsThe manufacturer and purchasershall agree on a representative number of specimens formechanical tests.12. Inspe
20、ction12.1 Unless otherwise specified, inspection of parts sup-plied on contract shall be made by the purchaser.13. Rejection and Rehearing13.1 Parts that fail to conform to the requirements of thisspecification may be rejected. Rejection should be reported tothe producer or supplier promptly and in
21、writing. In case ofdissatisfaction with test results, the producer or supplier maymake claim for rehearing.14. Certification14.1 When specified in the purchase order or contract, aproducers certification shall be furnished to the purchaser thatthe parts were manufactured, sampled, tested, and inspec
22、ted inaccordance with this specification and have been found to meetthe requirements. When specified in the purchase order orcontract, a report of the test results shall be furnished.14.2 The purchase order shall specify whether or not thecertification includes chemistry.14.3 Upon request of the pur
23、chaser in the contract or order,the certification of an independent third party indicatingconformance to the requirements of this specification may beconsidered.15. Keywords15.1 as-repressed; as-sintered; density; interconnected po-rosity; oil-impregnated; powder metallurgy; sintered alumi-num; stru
24、ctural parts; thermal conditionAPPENDIX(Nonmandatory Information)X1. MECHANICAL PROPERTIES AND HARDNESS DATAX1.1 Data for the mechanical properties of sintered alumi-num specimens are given in Table X1.1. The data do notconstitute a part of this specification. They merely indicate tothe purchaser th
25、e mechanical properties that may be expectedfrom special tension specimens conforming to the density andchemical requirements specified. It should be understood thatthe values represent specimens molded to size and not speci-mens cut from commercial parts. See Fig. 20 of Test MethodsE8.X1.2 Hardness
26、 values are given as apparent values, asdescribed in General Description of Production, Properties, andUses of Metal Powder Sintered Bearings, and Sintered MetalPowder Structural Parts (see gray pages).TABLE 1 Chemical RequirementsElementComposition, %AXX-6061AACXX-2014ACopper 0.5 max 3.55.0Magnesiu
27、m 0.41.2 0.20.8Silicon 0.20.8 1.2 maxAluminum, min 96.0 91.5Total of other elements,determined by difference,max1.5 1.5AAn “XX” denotes position of thermal condition designation.TABLE 2 DensityType Dry Density, g/cm3I 2.30 to 2.45II 2.45 to 2.60III 2.60 minB 595 95 (2006)2ASTM International takes no
28、 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 respons
29、ibility.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 addressed t
30、o 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 the add
31、ress 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 (phone),
32、 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE X1.1 Typical PropertiesAMaterial DesignationCodeBTypeUltimate TensileStrengthTensile YieldStrength (0.2 % offset)Elongationin 25 mm or 1in.,%ApparentRockwellHardnessMPa psi MPa psiAT1-6061 I 83 12 000 6
33、2 9 000 4.0 6065 HRHAT4-6061 I 97 14 000 79 11 500 3.5 6570 HRHAT6-6061 I 138 20 000 131 19 000 0.5 8085 HRHAT1-6061 II 128 18 500 69 10 000 6.0 8085 HRHAT4-6061 II 159 23 000 103 15 000 5.0 5055 HREAT6-6061 II 207 30 000 193 28 000 2.0 6570 HREACT1-2014 I 138 20 000 97 14 000 2.0 8085 HRHACT4-2014
34、I 165 24 000 145 21 000 2.0 5560 HREACT6-2014 I 207 30 000 172 25 000 0.5 6570 HREACT1-2014 II 152 22 000 117 17 000 3.0 8590 HRHACT4-2014 II 179 26 000 152 22 000 2.5 5560 HREACT6-2014 II 241 35 000 228 33 000 1.0 7075 HREACT1-2014 III 172 25 000 152 22 000 3.0 5560 HREACT4-2014 III 221 32 000 179
35、26 000 2.5 7075 HREACT6-2014 III 290 42 000 279 40 000 2.0 8085 HREATypical sintering atmosphere for the above grades may be nitrogen, dissociated ammonia, or vacuum.BDescription of Thermal Conditions:T1 as-sintered.T4 solution heat treated at (505 to 520C) 940 to 970F, cold water quenched and aged minimum of 4 days at room temperature.T6 solution heat treated at (505 to 520C) 940 to 970F, cold water quenched and aged 18 h at (160 to 175C) 320 to 350F.B 595 95 (2006)3
