ASTM A667/A667M-87(2003)

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 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 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 450F [230C].
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.
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: 09-May-2003
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.01 - Grey and White Iron Castings

Relations

• Replaces: ASTM A667/A667M-87(1998) - Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders
• Effective Date: 10-May-2003
• Replaced By: ASTM A667/A667M-87(2008) - Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders
• Effective Date: 01-Oct-2008
• 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: 10-May-2003

Standards Content (Sample)

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: A 667/A 667M – 87 (Reapproved 2003)
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 (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 3. Materials and Manufacture
1.1 This specification covers centrifugally cast cylinders 3.1 The melting procedures shall be optional with the
with an outer layer of white cast iron and the remainder of the foundry.
material of gray cast iron. These castings are suitable for 3.2 The white iron portion of the cylinder shall be made to
pressure containing parts the design strength of which is based a minimum hardness of 55 Scleroscope “C”. The gray iron
on the gray iron portion of the cylinder. These castings are portion of the cylinder shall conform to Specification A 278,
suitable for service at temperatures up to 450°F [230°C]. Class 20 [A 278M, Class 150].
1.2 The values stated in either inch-pound units or SI units 3.3 The casting process shall be controlled to produce a
are to be regarded separately as standard. Within the text, the metallurgical bond between the two metal layers.
SI units are shown in brackets. The values stated in each
4. Finish
system are not exact equivalents; therefore, each system must
be used independent of the other. Combining values from the 4.1 All surfaces shall be machined prior to the cylinders
being placed into service.
two systems may result in nonconformance with the specifi-
cation.
5. Physical Requirements
1.3 The following safety hazards caveat pertains only to the
5.1 Tensile Requirements—Tension test specimens removed
test method portion, Section 8, of this specification: This
from the casting shall have a tensile strength not less than 80 %
standarddoesnotpurporttoaddressallofthesafetyconcerns,
of that specified in 3.2.
if any, associated with its use. It is the responsibility of the user
5.2 Thickness of White Cast Iron:
of this standard to establish appropriate safety and health
5.2.1 The thickness of the white cast iron shall be not less
practices and determine the applicability of regulatory limita-
than 5 % nor more than 30 % of the total finished wall
tions prior to use.
thickness.
2. Referenced Documents
5.2.2 The thickness of the white cast iron shall be deter-
2.1 ASTM Standards: mined by ultrasonic testing.
A 278 Specification for Gray Iron Castings for Pressure-
6. Number of Tests
Containing Parts for Temperatures Up to 650°F (350°C)
6.1 The number of tension tests shall be in conformance
A 278M Specification for Gray Iron Castings for Pressure-
with Specifications A 278 and A 278M.
Containing Parts for Temperatures Up to 345°C [Metric]
7. Specimen Preparation
7.1 Separately cast test bars may be used to represent the
This specification is under the jurisdiction of CommitteeA04 on Iron Castings
and is the direct responsibility of Subcommittee A04.01 on Grey and White Iron
gray iron portion of the castings. The test bars shall be cast in
Castings.
core sand and have a nominal diameter of 2 in. [50 m].Tension
Current edition approved May 10, 2003. Published May 2003. Originally
test specimens shall be machined from test bars to the
approved in 1972. Last previous edition approved in 1998 as A 667/A 667M – 87
dimensions given for Specimen C in Specifications A 278 and
(1998).
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
A 278M.
cation SA-667 in Section II of that Code.
7.2 At the op
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