1、Designation: B955/B955M 11B955/B955M 14Standard Specification forAluminum-Alloy Centrifugal Castings1This standard is issued under the fixed designation B955/B955M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers aluminum-alloy centrifugal castings designated as shown in Table 1.1.2 This specification is not
3、intended for aluminum-alloy centrifugal castings used in aerospace applications.1.3 Alloy and temper designations are in accordance with ANSI H35.1 / H35.1 H35.1/H35.1 (M). The equivalent unifiednumbering system alloy designations are in accordance with Practice E527.1.4 Unless the order specifies t
4、he “M” specification designation, the material shall be furnished to the inch-pound units.1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, seeAnnex A1 and Annex A2.1.6 UnitsThe values stated in either SI units or inch-pound uni
5、ts are to be regarded separately as standard. The values statedin each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with the standard.1.7 This standard does not purport to addr
6、ess all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitation prior to use.2. Referenced Documents2.1 The following documents of the is
7、sue in effect on the date of casting purchase form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting ProcessesB275 Practice for Codification of Certain Nonferrous Metals and A
8、lloys, Cast and WroughtB557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy ProductsB557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)B660 Practices for Packaging/Packing of Aluminum and Magnesium ProductsB881 Termi
9、nology Relating to Aluminum- and Magnesium-Alloy ProductsB917/B917M Practice for Heat Treatment of Aluminum-Alloy Castings from All ProcessesB985 Practice for SamplingAluminum Ingots, Billets, Castings and Finished or Semi-Finished WroughtAluminum Products forCompositional AnalysisD3951 Practice for
10、 Commercial PackagingE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base AlloysE94 Guide for Radiographic ExaminationE155 Reference Radiographs for Inspection of Aluminum and Magnesium
11、 CastingsE165 Practice for Liquid Penetrant Examination for General IndustryE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)1 This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloysand is the direct responsibility of Subcommitt
12、ee B07.01 on AluminumAlloy Ingots and Castings.Current edition approved May 1, 2011Oct. 1, 2014. Published June 2011October 2014. Originally approved in 2007. Last previous edition approved in 20102011 asB955/B955MB955/B955M 11.-10. DOI: 10.1520/B0955_B0955M-11.10.1520/B0955_B0955M-14.2 For referenc
13、edASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the u
14、ser of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard
15、as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1E607 Test Method for Atomic Emission Spectrometric Analysi
16、s Aluminum Alloys by the Point to Plane Technique NitrogenAtmosphere (Withdrawn 2011)3E716 Practices for Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of ChemicalComposition by Spectrochemical AnalysisE1251 Test Method for Analysis of Aluminum and Aluminum Alloys
17、by Spark Atomic Emission SpectrometryE2422 Digital Reference Images for Inspection of Aluminum Castings2.3 ANSI Standard:4H35.1 / H35.1 H35.1/H35.1 (M) American National Standard Alloy and Temper Designation Systems for AluminumZ1.4 Sampling Procedures and Tables for Inspection by Attributes2.4 Mili
18、tary Standards:5MIL-STD-129 Marking for Shipment and StorageMIL-STD-276 Impregnation of Porous Nonferrous Metal Castings2.5 Naval Standard:6S9074-AR-GIB-010/278 Requirements for Fabrication Welding and Inspection, and Casting Inspection and repair forMachinery, Piping, and Pressure Vessels2.6 Federa
19、l Standard:5Fed Std. No. 123 Marking for Shipment (Civil Agencies)2.7 Other Standards:7CEN EN 14242 Aluminum and aluminum alloys. Chemical analysis. Inductively coupled plasma optical emission spectralanalysis.Aluminum AlloysChemical AnalysisInductively Coupled Plasma Optical Emission Spectral Analy
20、sis3. Terminology3.1 DefinitionsRefer to Terminology B881 for definitions of product terms used in this specification.3.2 Definitions of Terms Specific to This Standard:Refer to Terminology B881 for definitions of product terms used in thisspecification.3.2.1 Hot Isostatic Processinghot isostatic pr
21、ocessing (HIP, HIPped, and HIPping)HIPping), nthe process of applying highpressure and temperatures to a part through the medium of a pressurized gas, such asArgon or Nitrogen to remove internal porosityvoids.4. Ordering Information4.1 Orders for material under this specification shall include the f
22、ollowing information:4.1.1 This specification designation (which includes the number, the year, and the revision letter, if applicable),NOTE 1For inch-pound application, specify Specification B955 and for metric application specify Specification B955M. Do not mix units.4.1.2 Alloy (see Section (Sect
23、ion 7 and Table 1),3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600, Arlington, VA 22209, http:/www.aluminum.org.5 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Sect
24、ion D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.6 Available from Naval Sea Systems Command (NAVSEA), 1333 Isaac Hull Ave., SE, Washington, DC 20376, http:/www.navsea.navy.mil.7 Available from European Committee for Standardization (CEN), 36 rueRue de Stassart, B-1050,
25、 Brussels, Belgium, http:/www.CEN.eu/esearch.TABLE 1 Chemical Composition LimitsA,B,CAlloy Composition, %ANSID UNS Silicon Iron Copper Manga-neseMagnesium Chromium Nickel Zinc Titanium Tin Other ElementsE AluminumEach TotalF356.0 A03560 6.57.5 0.6G 0.25 0.35G 0.200.45 . . 0.35 0.25 . . 0.05 0.15 Rem
26、ainder505.0 0.400.8 0.7 0.150.40 0.15 0.81.2 0.040.35 0.25 0.15 . . 0.05 0.15 Remainder709.0 0.40 0.50 1.22.0 0.30 2.12.9 0.180.28 5.1-6.1 0.20 0.05 0.15 Remainder850.0 A08500 0.7 0.7 0.71.3 0.10 0.10 . 0.71.3 . 0.20 5.57.0 0.30 RemainderA When single units are shown, these indicate the maximum amou
27、nts permitted.B Analysis shall be made for the elements for which limits are shown in this table.C The following applies to all specified limits in this table: For purposes of determining conformance to these limits, an observed value or a calculated value obtained fromanalysis shall be rounded to t
28、he nearest unit in the last right-hand place of figures used in expressing the specified limit in accordance with the rounding method of PracticeE29.D ASTM alloy designations are defined in ANSI H35.1/H35.1 (M)(M).E Others includes listed elements for which no specific limit is shown as well as unli
29、sted metallic elements. The producer may analyze samples for trace elements notspecified in the specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaserestablish that an Others element exceeds the limit
30、 of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considerednonconforming.F 2Other ElementsTotal shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.G If the iron content
31、 exceeds 0.45 %, manganese content shall not be less than one half of the iron.B955/B955M 1424.1.3 Temper (see Section (Section 9 and Table 2 Table 3),4.1.4 Applicable drawing or part number, and4.1.5 The quantity in either pieces or pounds.4.2 Additionally, orders for material to this specification
32、 shall include the following information when required by thepurchaser:4.2.1 Whether chemical composition samples are to be taken from the castings (see (7.2),4.2.2 Whether foundry control is required (see section (Section 8.2),4.2.3 Whether yield strength tests are required (see Section (9 and Tabl
33、e 2, Footnote D,Footnote D in Table 2 Table 3, FootnoteD), ),4.2.4 Whether test specimens are to be cut from castings in addition to or instead of centrifugally cast test blocks (see Sections(Sections 9, 10.1, 11.2, and 13),4.2.5 Whether special tensile test sampling agreement is required for large
34、castings (Section (10.3.2),4.2.6 Whether repairs are permissible (see Section (Section 16),4.2.7 Whether inspection is required at the producers works (see Section (Section 17),4.2.8 Whether surface requirements will be checked visually or by observational standards where such standards are establis
35、hed(see (18.1),4.2.9 Whether liquid penetrant inspection is required (see (18.2),4.2.10 Whether radiographic inspection is required and, if so, the radiographic grade of casting required (18.3 and Table 4),4.2.11 Whether certification is required (see Section (Section 21), and4.2.12 Whether Practice
36、s B660 appliesapply and, if so, the levels of preservation, packaging, and packing required (see (22.4).),and4.2.13 Whether marking in accordance with Fed. Std. 123 orFed. Std. No. 123, Practice D3951, or MIL-STD-129 applies(22.4).5. Responsibility for Quality Assurance5.1 Unless otherwise specified
37、 in the contract or purchase order, the producer shall be responsible for the performance of allinspections and test requirements specified herein. Unless otherwise agreed upon, the producer may use his own or any othersuitable facilities for the performance of the inspection and test requirements s
38、pecified herein. The purchaser shall have the rightto perform any of the inspections and tests set forth in the specification where such inspections are deemed necessary to confirmthat the material conforms to prescribed requirements.6. Materials and Manufacture6.1 The responsibility of furnishing c
39、astings that can be laid out and machined to the finished dimensions within the permissiblevariations specified, as shown on the blueprints or drawings, shall rest with the producer, except where mold equipment isfurnished by the purchaser.7. Chemical Composition7.1 The Product shall conform to the
40、chemical composition limits prescribed in Table 1. Conformance shall be determined bythe producer by taking samples at the time castings are poured in accordance with Practices E716 and analyzed in accordance withTABLE 2 Tensile Requirements, (Inch-Pound Units)A,BAlloy TemperCTensileStrength, min,ks
41、iYieldStrengthD(0.2 % offset),min, ksiElongation in2 in. or 4 Diameter,min, %Typical BrinellHardnessE500-kgf load,10-mm ballANSIF UNS356.0 A03560 T6 separately cast specimens 33.0 22.0 3.0 85505.0 T61 specimens cut from castingsG 43.0 37.0 7.0 95709.0 T61 specimens cut from castingsH 74.0 64.0 4.0 1
42、50850.0 A08500 T5 separately cast specimens 18.0 . 8.0 A If agreed upon by manufacturer and the purchaser, other mechanical properties may be obtained by other heat treatments such as annealing, aging, or stress relieving.B For purposes of determining conformance with this specification, each value
43、for tensile strength and yield strength shall be rounded off to the nearest 0.1 ksi, and eachvalue for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.C Temper designations are defined in ANSI H35.1/H35.1 (M) T61 Hot Isostatic Pressed (HI
44、P), solution heat-treated, and then artificially aged.D Yield strength to be evaluated only when specified in contract or purchase order.E Hardness values given for information only, not required for acceptance.F ASTM alloy designations are recorded in Practice B275.G These properties apply only to
45、castings having section thicknesses not greater than 2.5 in. Tensile specimens were taken from the casting after HIPping was completed.The data used to calculate the minimum values came from samples taken in the axial direction. While not combinable with the axial data, tangential values are margina
46、llyhigher.H These properties apply only to castings having section thicknesses not greater than 2.5 in. Tensile specimens were taken from the casting after HIPping was completed.Samples were taken in both the axial and tangential directions and the data was found to be combinable. The data represent
47、s both directions.B955/B955M 143Practices E716, Test Methods E34, E607, or E1251, E34or EN 14242. If the producer has determined the composition of thematerial during casting, they shall not be required to sample and analyze the finished product.7.1.1 A sample for determination of chemical compositi
48、on shall be taken to represent one of the following:7.1.1.1 Not more than 4000 lb 2000 kg of clean castings or a single casting poured from one furnace. The maximum elapsedtime between determinations shall be established for each alloy but in any case this maximum elapsed time shall not exceed eight
49、hours.7.2 If it becomes necessary to analyze castings for conformance to chemical composition limits, the method used to samplecastings for the determination of chemical composition shall be by agreement between thein accordance with PracticeB985producer and the purchaser. . Analysis shall be performed in accordance with Practices E716, Test Methods E34, E607, orE1251, E34or EN 14242 (ICP method)method).7.3 Other methods of analysis or in the case of a dispute the method of analysis shall be agreed upon by the producer and thepurchas
