ASTM A667 A667M-1987(2003) Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders.pdf

1、Designation: A 667/A 667M 87 (Reapproved 2003)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 (e) 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 Thi

3、s 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 aresuit

4、able for service at temperatures up to 450F 230C.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 mustbe used in

5、dependent of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.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

6、any, associated with its use. It is the responsibility 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:A 278 Specification for Gray Iron Castings for Pres

7、sure-Containing Parts for Temperatures Up to 650F (350C)3A 278M Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 345C Metric43. Materials and Manufacture3.1 The melting procedures shall be optional with thefoundry.3.2 The white iron portion of the cylinder sh

8、all be made toa minimum hardness of 55 Scleroscope “C”. The gray ironportion of the cylinder shall conform to Specification A 278,Class 20 A 278M, Class 150.3.3 The casting process shall be controlled to produce ametallurgical bond between the two metal layers.4. Finish4.1 All surfaces shall be mach

9、ined prior to the cylindersbeing placed into service.5. Physical Requirements5.1 Tensile RequirementsTension test specimens removedfrom the casting shall 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 sha

10、ll 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 ultrasonic testing.6. Number of Tests6.1 The number of tension tests shall be in conformancewith Specifications A 278 and A 278M.7. Specimen Preparation7.1

11、 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 of 2 in. 50 m. Tensiontest specimens shall be machined from test bars to thedimensions given for Specimen C in Specifications A 278 andA 278M.

12、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 inside diameter of the1This specification is under the jurisdiction of Committee A04 on Iron Castingsand is the direct responsibility of Su

13、bcommittee A04.01 on Grey and White IronCastings.Current edition approved May 10, 2003. Published May 2003. Originallyapproved in 1972. Last previous edition approved in 1998 as A 667/A 667M 87(1998).2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-667 in Section

14、II of that Code.3Annual Book of ASTM Standards, Vol. 01.02.4Discontinued. Replaced by A 278/A 278M. See 2000Annual Book of ASTMStandards, Vol 01.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.casting and the interface between the

15、 two layers. Tension testspecimens machined from these test bars shall conform to thedimensions shown for Specimen C in Specifications A 278 andA 278M.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-align

16、ing shackles is suggested. After reaching a stressequivalent 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 purchas

17、eris being performed to all parts of the manufacturers 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 a

18、nd inspectionsshall be made at the place of manufacture 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 th

19、e casting. Upon request of the purchaser andwhen so specified 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 m

20、aterial has been sampled, tested, and inspectedin accordance 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

21、shall have the name of the manufacturer orhis recognized 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 vali

22、dity 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 responsibility.This standard is subj

23、ect 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 to ASTM International Headquar

24、ters. 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 address shown below.This standar

25、d 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), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 667/A 667M 87 (2003)2