1、Designation: A 667/A 667M 87 (Reapproved 2008)Standard Specification forCentrifugally Cast Dual Metal (Gray and White Cast Iron)Cylinders1This standard is issued under the fixed designation A 667/A 667M; the number immediately following the designation indicates the yearof original adoption or, in t
2、he case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This
3、 specification2covers centrifugally cast cylinderswith an outer layer of white cast iron and the remainder of thematerial of gray cast iron. These castings are suitable forpressure containing parts the design strength of which is basedon the gray iron portion of the cylinder. These castings aresuita
4、ble for service at temperatures up to 450F 230C.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from th
5、e two systems may result in non-conformancewith the standard.1.3 The following safety hazards caveat pertains only to thetest method portion, Section 8, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibilit
6、y of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:3A 278/A 278M Specification for Gray Iron Castings forPressure-Containing Parts for Temperatures Up to 6
7、50F(350C)3. Materials and Manufacture3.1 The melting procedures shall be optional with thefoundry.3.2 The white iron portion of the cylinder shall be made toa minimum hardness of 55 Scleroscope “C”. The gray ironportion of the cylinder shall conform to Specification A 278/A 278M, Class 20 or Class 1
8、50.3.3 The casting process shall be controlled to produce ametallurgical bond between the two metal layers.4. Finish4.1 All surfaces shall be machined prior to the cylindersbeing placed into service.5. Physical Requirements5.1 Tensile RequirementsTension test specimens removedfrom the casting shall
9、have a tensile strength not less than 80 %of that specified in 3.2.5.2 Thickness of White Cast Iron:5.2.1 The thickness of the white cast iron shall be not lessthan 5 % nor more than 30 % of the total finished wallthickness.5.2.2 The thickness of the white cast iron shall be deter-mined by ultrasoni
10、c testing.6. Number of Tests6.1 The number of tension tests shall be in conformancewith Specification A 278/A 278M.7. Specimen Preparation7.1 Separately cast test bars may be used to represent thegray iron portion of the castings. The test bars shall be cast incore sand and have a nominal diameter o
11、f 2 in. 50 mm.Tension test specimens shall be machined from test bars to thedimensions given for Specimen C in Specification A 278/A 278M.7.2 At the option of the manufacturer he may substitute testbars taken from the gray iron portion of the casting. The testbars shall be taken midway between the i
12、nside diameter of thecasting and the interface between the two layers. Tension testspecimens machined from these test bars shall conform to thedimensions shown for Specimen C in Specification A 278/A 278M.1This specification is under the jurisdiction of Committee A04 on Iron Castingsand is the direc
13、t responsibility of Subcommittee A04.01 on Grey and White IronCastings.Current edition approved Oct. 1, 2008. Published November 2008. Originallyapproved in 1972. Last previous edition approved in 2003 as A 667/A 667M 87(2003).2For ASME Boiler and Pressure Vessel Code applications see related Specif
14、i-cation SA-667 in Section II of that Code.3For 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.1Copyright ASTM In
15、ternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8. Test Method8.1 Tension test specimens shall fit the holders of the testingmachine in such a way that the load shall be axial. The use ofself-aligning shackles is suggested. After reaching a stressequi
16、valent to 15 000 psi 100 MPa the speed of the movinghead of the testing machine shall not exceed18 in. 3.2mm/min.9. Inspection9.1 The inspector representing the purchaser shall have freeentry at all times while work on the contract of the purchaseris being performed to all parts of the manufacturers
17、 works thatconcern the manufacture of the material ordered. The manu-facturer shall afford the inspector without charge all reasonablefacilities to satisfy him that the material is being furnished inaccordance with this specification. All tests and inspectionsshall be made at the place of manufactur
18、e prior to the shipmentunless otherwise specified and shall be so conducted as not tointerfere unnecessarily with the operation of the works.10. Acceptance and Certification10.1 Final acceptance of the casting shall follow completemachining of the casting. Upon request of the purchaser andwhen so sp
19、ecified in the purchase order, a certification shall bemade on the basis of acceptance of the material. This shallconsist of a copy of the manufacturers test report or astatement by the supplier accompanied by a copy of the testresults that the material has been sampled, tested, and inspectedin acco
20、rdance with the provisions of this specification. Eachcertification so furnished shall be signed by an authorized agentof the supplier or manufacturer.11. Product Marking11.1 Pressure containing castings made in accordance withthis specification shall have the name of the manufacturer orhis recogniz
21、ed trademark and the class of iron to which itconforms cast or indelibly stamped on the surface indicated bythe purchaser or in such a position as not to injure theusefulness of the casting.ASTM International takes no position respecting the validity of any patent rights asserted in connection with
22、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 responsibility.This standard is subject to revision at any time by the responsible technic
23、al 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 to ASTM International Headquarters. Your comments will receive careful consideration
24、 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 address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbo
25、r 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), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 667/A 667M 87 (2008)2
