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ASTM A667/A667M-87(2012)

(Specification)

Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders

Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders

ABSTRACT
This specification covers centrifugally cast cylinders with an outer layer of white cast iron and the remainder of the material of gray cast iron. These castings are suitable for pressure containing parts of the design strength of which is based on the gray iron portion of the cylinder. The white iron portion of the cylinder shall be made to a minimum hardness and the casting process shall be controlled to produce a metallurgical bond between the two metal layers. All surfaces shall be machined prior to the cylinders being placed into service. The tensile strength of the cast irons shall be measured by tension testing while the thickness of the white cast iron shall be determined by ultrasonic testing.
SCOPE
1.1 This specification2 covers centrifugally cast cylinders with an outer layer of white cast iron and the remainder of the material of gray cast iron. These castings are suitable for pressure containing parts the design strength of which is based on the gray iron portion of the cylinder. These castings are suitable for service at temperatures up to 450°F [230°C].  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 The following safety hazards caveat pertains only to the test method portion, Section 8, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Sep-2012
ICS
77.140.80 - Iron and steel castings
Technical Committee
A04 - Iron Castings
Drafting Committee
A04.01 - Grey and White Iron Castings
Current Stage
Ref Project

Relations

Replaces
ASTM A667/A667M-87(2008) - Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders
Effective Date
01-Oct-2012
Referred By
ASTM A748/A748M-87(2022) - Standard Specification for Statically Cast Chilled White Iron-Gray Iron Dual Metal Rolls for Pressure Vessel Use
Effective Date
01-Oct-2012

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ASTM A667/A667M-87(2012) - Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) CylindersASTM A667/A667M-87(2012) - Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders
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ASTM A667/A667M-87(2012) - Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A667/A667M −87 (Reapproved 2012)
Standard Specification for
Centrifugally Cast Dual Metal (Gray and White Cast Iron)
Cylinders
This standard is issued under the fixed designationA667/A667M; 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 (´) 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 3.2 The white iron portion of the cylinder shall be made to
2 a minimum hardness of 55 Scleroscope “C”. The gray iron
1.1 This specification covers centrifugally cast cylinders
portion of the cylinder shall conform to Specification A278/
with an outer layer of white cast iron and the remainder of the
A278M, Class 20 or Class 150.
material of gray cast iron. These castings are suitable for
pressure containing parts the design strength of which is based 3.3 The casting process shall be controlled to produce a
on the gray iron portion of the cylinder. These castings are metallurgical bond between the two metal layers.
suitable for service at temperatures up to 450°F [230°C].
4. Finish
1.2 The values stated in either SI units or inch-pound units
4.1 All surfaces shall be machined prior to the cylinders
are to be regarded separately as standard. The values stated in
being placed into service.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
5. Physical Requirements
values from the two systems may result in non-conformance
5.1 Tensile Requirements—Tension test specimens removed
with the standard.
from the casting shall have a tensile strength not less than 80 %
1.3 The following safety hazards caveat pertains only to the
of that specified in 3.2.
test method portion, Section 8, of this specification: This
5.2 Thickness of White Cast Iron:
standarddoesnotpurporttoaddressallofthesafetyconcerns,
5.2.1 The thickness of the white cast iron shall be not less
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser
than 5 % nor more than 30 % of the total finished wall
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita- thickness.
5.2.2 The thickness of the white cast iron shall be deter-
tions prior to use.
mined by ultrasonic testing.
2. Referenced Documents
6. Number of Tests
2.1 ASTM Standards:
A278/A278M Specification for Gray Iron Castings for
6.1 The number of tension tests shall be in conformance
Pressure-Containing Parts for Temperatures Up to 650°F
with Specification A278/A278M.
(350°C)
7. Specimen Preparation
3. Materials and Manufacture
7.1 Separately cast test bars may be used to represent the
3.1 The melting procedures shall be optional with the
gray iron portion of the castings. The test bars shall be cast in
foundry.
core sand and have a nominal diameter of 2 in. [50 mm].
Tension test specimens shall be machined from test bars to the
This specification is under the jurisdiction of Committee A04 on Iron
dimensions given for Specimen C in Specification A278/
Castingsand is the direct responsibility of Subcommittee A04.01 on Grey andWhite
A278M.
Iron Castings.
Current edition approved Oct. 1, 2012. Published November 2012. Originally
7.2 At the option of the manufacturer he may substitute test
approved in 1972. Last previous edition approved in 2008 as A667/A667M – 87
bars taken from the gray iron portion of the casting. The test
(2008). DOI: 10.1520/A0667_A0667M-87R12.
bars shall be taken midway between the inside diameter of the
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-667 in Section II of that Code.
casting and
...

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1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
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