Designation: A 667/A 667M – 87 (Reapproved 1998) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Centrifugally Cast Dual Metal (Gray and White Cast Iron)
Cylinders1
This standard is issued under the fixed designation A 667/A 667M; the number immediately following the designation indicates the year
of original adoption or, in the 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. Scope Class 20 [A 278M, Class 150].
1.1 This specification2 covers centrifugally cast cylinders 3.3 The casting process shall be controlled to produce a
with an outer layer of white cast iron and the remainder of the metallurgical bond between the two metal layers.
material of gray cast iron. These castings are suitable for 4. Finish
pressure containing parts the design strength of which is based
on the gray iron portion of the cylinder. These castings are 4.1 All surfaces shall be machined prior to the cylinders
suitable for service at temperatures up to 450°F [230°C]. being placed into service.
1.2 The values stated in either inch-pound units or SI units 5. Physical Requirements
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each 5.1 Tensile Requirements—Tension test specimens removed
system are not exact equivalents; therefore, each system must from the casting shall have a tensile strength not less than 80 %
be used independent of the other. Combining values from the of that specified in 3.2.
two systems may result in nonconformance with the specifi- 5.2 Thickness of White Cast Iron:
cation. 5.2.1 The thickness of the white cast iron shall be not less
1.3 The following safety hazards caveat pertains only to the than 5 % nor more than 30 % of the total finished wall
test method portion, Section 8, of this specification: This thickness.
standard does not purport to address all of the safety problems, 5.2.2 The thickness of the white cast iron shall be deter-
if any, associated with its use. It is the responsibility of the user mined by ultrasonic testing.
of this standard to establish appropriate safety and health 6. Number of Tests
practices and determine the applicability of regulatory limita-
tions prior to use. 6.1 The number of tension tests shall be in conformance
with Specifications A 278 and A 278M.
2. Referenced Documents
7. Specimen Preparation
2.1 ASTM Standards:
A 278 Specification for Gray Iron Castings for Pressure- 7.1 Separately cast test bars may be used to represent the
Containing Parts for Temperatures Up to 650°F3 gray iron portion of the castings. The test bars shall be cast in
A 278M Specification for Gray Iron Castings for Pressure- core sand and have a nominal diameter of 2 in. [50 m]. Tension
Containing Parts for Temperatures Up to 345°C [Metric]3 test specimens shall be machined from test bars to the
dimensions given for Specimen C in Specifications A 278 and
3. Materials and Manufacture A 278M.
3.1 The melting procedures shall be optional with the 7.2 At the option of the manufacturer he may substitute test
foundry. bars taken from the gray iron portion of the casting. The test
3.2 The white iron portion of the cylinder shall be made to bars shall be taken midway between the inside diameter of the
a minimum hardness of 55 Scleroscope “C”. The gray iron casting and the interface between the two layers. Tension test
portion of the cylinder shall conform to Specification A 278, specimens machined from these test bars shall conform to the
dimensions shown for Specimen C in Specifications A 278 and
A 278M.
1
This specification is under the jurisdiction of Committee A-4 on Iron Castings
and is the direct responsibility of Subcommittee A04.01 on Grey and White Iron 8. Test Method
Castings.
Current edition approved Oct. 30, 1987. Published December 1987. Originally 8.1 Tension test specimens shall fit the holders of the testing
published as A 667 – 72. Last previous edition A 667 – 72 (1982). machine in such a way that the load shall be axial. The use of
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- self-aligning shackles is suggested. After reaching a stress
cation SA-667 in Section II of that Code.
3
Annual Book of ASTM Standards, Vol. 01.02. equivalent to 15 000 psi [100 MPa] the speed of the moving
1
A 667/A 667M
head of the testing machine shall not exceed 1⁄8 in. [3.2 when so specified in the purchase order, a certification shall be
mm]/min. made on the basis of acceptance of the material. This shall
consist of a copy of the manufacturer’s test report or a
9. Inspection statement by the supplier accompanied by a copy of the test
9.1 The inspector representing the purchaser shall have free results that the material has been sampled, tested, and inspected
entry at all times while work on the contract of the purchaser in accordance with the provisions of this specification. Each
is being performed to all parts of the manufacturer’s works that certification so furnished shall be signed by an authorized agent
concern the manufacture of the material ordered. The manu- of the supplier or manufacturer.
facturer shall afford the inspector without charge all reasonable
facilities to satisfy him that the material is being furnished in 11. Product Marking
accordance with this specification. All tests and inspections
shall be made at the place of manufacture prior to the shipment 11.1 Pressure containing castings made in accordance with
unless otherwise specified and shall be so conducted as not to this specification shall have the name of the manufacturer or
interfere unnecessarily with the operation of the works. his recognized trademark and the class of iron to which it
conforms cast or indelibly stamped on the surface indicated by
10. Acceptance and Certification the purchaser or in such a position as not to injure the
10.1 Final acceptance of the casting shall follow complete usefulness of the casting.
machining of the casting. Upon request of the purchaser and
The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection
with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such
patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and
if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards
and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible
technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your
views known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
