1、Designation: B 823 01Standard Specification forMaterials for Nonferrous Powder Metallurgy (P/M) StructuralParts1This standard is issued under the fixed designation B 823; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、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 a variety of nonferrous powdermetallurgy (P/M) structural materials and includes a classifi
3、-cation system, or material designation code. With the classifi-cation system, this specification includes chemical compositionand minimum tensile yield strength.1.2 The property values stated in inch-pound units are to beregarded as the standard. The values given in parentheses arefor information o
4、nly.NOTE 1Paragraphs 6.1 and 8.1 govern material classification by thedesignation code. The classification system is explained in the Appendix.2. Referenced Documents2.1 ASTM Standards:B 243 Terminology of Powder Metallurgy2B 328 Test Method for Density, Oil Content, and Intercon-nected Porosity of
5、Sintered Powder Metal Structural Partsand Oil-Impregnated Bearings22.2 Other Standard:MPIF Standard 35, Materials Standard for P/M StructuralParts33. Terminology3.1 DefinitionsDefinitions of powder metallurgy termscan be found in Terminology B 243. Additional descriptiveinformation is available in t
6、he Related Materials section of Vol02.05 of the Annual Book of ASTM Standards.4. Ordering Information4.1 Materials for parts covered by this specification shall beordered by materials designation code.4.2 Orders for parts under this specification may include thefollowing information:4.2.1 Certificat
7、ion, if required (see Section 10),4.2.2 Test methods and mechanical properties other thanstrength (see 8.2 and 8.3),4.2.3 Density (see 7.1),4.2.4 Porosity and oil content (see 7.2), and4.2.5 Special packaging, if required.5. Materials and Manufacture5.1 Structural parts shall be made by pressing and
8、 sinteringmetal powders. Parts may also be made by repressing andresintering sintered parts, if necessary, to produce finished partsin conformance with the requirements of this specification.6. Chemical Composition6.1 The material shall conform to the requirements providedin Table 1.6.2 Chemical ana
9、lysis, if required, shall be performed byany method agreed upon by the manufacturer and the pur-chaser.7. Physical Properties7.1 Density:7.1.1 The buyer and the seller may agree upon a minimumaverage density for the part and minimum densities for specificregions of the part.7.1.2 Density shall be de
10、termined in accordance with TestMethod B 328.7.2 Porosity:7.2.1 The buyer and the seller may agree upon a minimumvolume oil content for parts that are to be self-lubricating.7.2.2 The buyer and the seller may agree upon a functionaltest for porosity in parts that are to be self-lubricating, or forpe
11、rmeability where fluid flow must be restricted.8. Mechanical Properties8.1 The minimum guaranteed tensile yield strength, asshown in Table 2, is a numerical suffix to the materialdesignation code and is read as 103psi. The code is adoptedfrom MPIF Standard 35. All tensile yield strengths are defined
12、as the 0.2 % offset yield strengths.8.2 The purchaser and manufacturer should agree upon themethod to be used to verify the minimum strength character-istics of the finished parts. Since it is usually impossible tomachine tensile test specimens from these parts, alternativestrength tests are advisab
13、le. An example would be measuring1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.05 on Structural Parts.Current edition approved Oct. 10, 2001. Published December 2001. Originallypublish
14、ed as B 823 92. Last previous edition B 823 93.2Annual Book of ASTM Standards, Vol 02.05.3Available from Metal Powder Industries Federation, 105 College Road East,Princeton, NJ 08540.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.th
15、e force needed to break teeth off a gear with the gear properlyfixtured.8.3 The tensile yield strength of the part may be measuredindirectly by testing flat tensile bars (See Fig. 1) molded fromthe same mixed powder lot at the density of the critical regionof the parts and then processed along with
16、the parts.8.4 Transverse rupture strength values can also be related totensile yield strengths by correlation. While nonferrous P/Mmaterials are technically too ductile for this simple beam test,the test values are reproducible and useful.9. Sampling9.1 LotUnless otherwise specified, a lot shall con
17、sist ofparts of the same form and dimensions made from powders ofthe same composition, molded and processed under the sameconditions, and submitted for inspection at one time.9.2 Chemical AnalysisWhen requested on the purchaseorder, at least one sample for chemical analysis shall be takenfrom each l
18、ot. The analysis shall be performed by a mutuallyagreed upon method.9.3 Mechanical TestsThe manufacturer and the purchasershall agree upon a representative number of specimens formechanical tests.10. Rejection and Rehearing10.1 Parts failing to conform to the requirements of thisspecification may be
19、 rejected. Rejection should be reported tothe producer or supplier promptly and in writing.11. Certification11.1 When specified in the purchase order or contract, acertification from the producer shall be furnished to thepurchaser which states that the parts were manufactured,sampled, tested, and in
20、spected in accordance with this speci-fication and have been found to meet its requirements. Whenspecified in the purchase order or contract, a report of the testresults shall be furnished.12. Keywords12.1 brass; bronze; nickel silver; nonferrous powder metal-lurgy; nonferrous structural parts; powd
21、er metallurgy (P/M);structural partsTABLE 1 Chemical RequirementsMaterialDesignationChemical Composition, %ACu Zn Pb Sn NiCZ-1000 88.0 remainder . . . . . . . . . min91.0 remainder . . . . . . . . . maxCZP-1002 88.0 remainder 1.0 . . . . . . min91.0 remainder 2.0 . . . . . . maxCZ-2000 77.0 remainde
22、r . . . . . . . . . min80.0 remainder . . . . . . . . . maxCZP-2002 77.0 remainder 1.0 . . . . . . min80.0 remainder 2.0 . . . . . . maxCZ-3000 68.5 remainder . . . . . . . . . min71.5 remainder . . . . . . . . . maxCZP-3002 68.5 remainder 1.0 . . . . . . min71.5 remainder 2.0 . . . . . . maxCNZ-181
23、8 62.5 remainder . . . . . . 16.5 min65.5 remainder . . . . . . 19.5 maxCNZP-1816 62.5 remainder 1.0 . . . 16.5 min65.5 remainder 2.0 . . . 19.5 maxCT-1000 87.5 remainder . . . 9.5 . . . min90.5 remainder . . . 10.5 . . . maxAOther elements: the total by difference equals 2.0 % maximum, which mayinc
24、lude other minor elements added for specific purposes.TABLE 2 Minimum Yield Strength for Nonferrous AlloysMaterial DesignationCodeMinimum YieldStrength, 103psiCZ-1000-9 9-10 10-11 11CZP-1002-7 7CZ-2000-11 11-12 12CZP-2002-11 11-12 12CZ-3000-14 14-16 16CZP-3002-13 13-14 14CNZ-1818-17 17CNZP-1816-13 1
25、3CT-1000-13 (repressed) 13Pressing Area = 1.00 in.2NoteDimensions specified, except G and T are those of the die.Dimensionsin. mmAHalf length of reduced section58 15.88BGrip length 3.1876 0.001 80.95 6 0.03CWidth of grip section 0.343 6 0.001 8.71 6 0.03DWidth at center 0.225 6 0.001 5.72 6 0.03EEnd
26、 radius 0.171 6 0.001 4.34 6 0.03FHalf width of grip section 0.171 6 0.001 4.34 6 0.03GGage length 1.000 6 0.003 25.40 6 0.08LOverall length 3.529 6 0.001 89.64 6 0.03RRadius of fillet 1 25.4TCompact to this thickness 0.140 to 0.250 3.56 to 6.35WWidth at end of reduced section 0.235 6 0.001 5.97 6 0
27、.03FIG. 1 Standard Flat Unmachined Tension Test Specimen forPowder Metallurgy ProductsB 8232APPENDIX(Nonmandatory Information)X1. USE OF THIS SPECIFICATIONX1.1 P/M Material Code Designation:X1.1.1 The P/M material code designation, or identifyingcode for structural P/M parts, defines a specific mate
28、rial as tochemistry and minimum strength, expressed in 103psi (6.895MPa (6.895 N/mm2). For example, CZ-1000-9 is a P/Mcopper zinc material containing nominal 90 % copper and10 % zinc. It has a minimum yield strength of 9 3 103psi(9000 psi) in the as-sintered condition.X1.1.2 The system offers a conv
29、enient means of designatingboth the chemistry and minimum strength value of anystandard P/M material. For each standard material, the densityis given as one of the typical values and is no longer arequirement of the specification.X1.1.3 Code designations in this specification and revisionsthereof ap
30、ply only to P/M materials for which specificationshave been adopted. In order to avoid confusion, the P/Mmaterial designation coding system is intended for use onlywith such materials, and it should not be used to createnonstandard materials. The explanatory notes, property values,and other contents
31、 of this specification have no application toany other materials.X1.1.4 In the coding system, the prefix letters denote thegeneral type of material. For example, the prefix CZ representscopper (C) and zinc (Z), which is known as brass. The prefixletter codes are as follows:X1.1.4.1 C = copper (Cu),X
32、1.1.4.2 CT = bronze (Cu-Sn),X1.1.4.3 CNZ = nickel silver (Cu-Ni-Zn),X1.1.4.4 CZ = brass (Cu-Zn),X1.1.4.5 N = nickel (Ni),X1.1.4.6 P = lead (Pb), andX1.1.4.7 T = tin (Sn).X1.2 Prefix and Four-Digit CodeThe four digits follow-ing the prefix letter code refer to the composition of thematerial. In nonfe
33、rrous materials, the first two numbers in thefour-digit series designate the percent of the major alloyingconstituent; the last two numbers of the four digit seriesdesignate the percent of the minor alloying constituent. Forimproved machinability, lead is sometimes the third alloyingelement in a non
34、ferrous alloy system. Lead will then beindicated only by the letter “P” in the prefix. The percent oflead or any other minor alloying element that happens to beexcluded from the four-digit nomenclature is represented in the“chemical composition” information that appears with eachstandard material. F
35、or an illustration of P/M nonferrous mate-rial designation coding, see Fig. X1.1.X1.3 Suffx Digit CodeThe two-digit suffix represents theminimum strength value, expressed in 103psi (6.895 MPa(6.895 N/mm2), that the user can expect from the P/M materialpossessing that chemistry. The minimum tensile y
36、ield strengthfor these materials in the as-sintered condition is given in TableX1.1.X1.4 Data SourceInformation used in compiling thisspecification was contributed by the membership of ASTMCommittee B09 on Metal Powders and Metal Powder Productsand the Standards Committee of the Powder Metallurgy Pa
37、rtsAssociation of MPIF. These technical data are on file at MPIFHeadquarters, Princeton, NJ and are reproduced in this speci-fication with the permission of the Metal Powder IndustriesFederation.FIG. X1.1 Illustration of Powder Metallurgy Nonferrous MaterialDesignation CodingB 8233ASTM International
38、 takes 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 ow
39、n responsibility.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 ad
40、dressed 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, a
41、t the 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
42、 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE X1.1 Nonferrous Alloys: Brass, Bronze, and Nickel SilverNOTE 1 103psi = 6.895 MPa (6.895 N/mm2).NOTE 21 in. = 25.4 mm.NOTE 31 ft-lb = 1.356 J.Powder Metallurgy Material PropertiesMinimum Values
43、ATypical ValuesBMaterialDesignationCodeMinimumStrength,Yield,A103psiTensile PropertiesPoissonsRatioTransverseRuptureStrength,103psiUnnotchedCharpyImpactEnergy,ft-lbDensity,g/cm3Compres-siveYieldStrength,0.1 %,103psiHardnessUltimateStrength,103psiYieldStrength,0.2 %,103psiElonga-tion,in 1 in.,%Youngs
44、Modulus,106psiApparent(Direct),RockwellCZ-1000-9 9 18.0 9.5 9.0 11.5 0.31 39 15.0 7.60 12 65HRH-10 10 20.0 11.0 10.5 13.0 0.31 46 24.0 7.90 12 72-11 11 23.0 12.0 12.0 14.5 0.31 52 31.0 8.10 12 80CZP-1002-7 7 20.0 8.5 10.0 13.0 0.31 45 24.0 7.90 10 66HRHCZ-2000-11 11 23.0 13.5 9.0CC52 27.0 7.6C73CZ-2
45、000-12 12 35.0 17.0 18.0 70 45.0 8.0C82CZP-2002-11 11 23.0 13.5 9.0 12.5 0.31 52 27.0 7.60 12 73HRH-12 12 35.0 17.0 18.0 14.5 0.31 70 45.0 8.00 14 82CZ-3000-14 14 28.0 16.0 14.0 12.0 0.31 62 23.0 7.60 18 84HRH-16 16 34.0 19.0 17.0 13.0 0.31 86 38.0 8.00 19 92CZP-3002-13 13 27.0 15.0 14.0 12.0 0.31 5
46、7 12.0 7.60 12 80HRH-14 14 31.5 16.5 16.0 13.0 0.31 71 25.0 8.00 15 88CNZ-1818-17 17 34.0 20.0 11.0 13.5 0.31 73 24.0 7.90 24 90HRHCNZP-1816-13 13 26.0 15.0 10.0 13.5 0.31 50 22.0 7.90 18 86HRHCT-1000-13 (repressed) 13 22.0 16.0 4.0 8.5 0.31 45 4.0 7.20 20 82HRHASuffix numbers represent minimum strength values in 103psi.BMechanical property data derived from laboratory-prepared test specimens sintered under commercial manufacturing conditions.CAdditional data in preparation will appear in subsequent editions of this specification.B 8234
