ASTM A667/A667M-87(2022)

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 nonconformance 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2022
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.01 - Grey and White Iron Castings

Relations

• Refers: ASTM A278/A278M-01(2020) - Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650 °F (350 °C)
• Effective Date: 01-May-2020
• Refers: ASTM A278/A278M-01(2011) - Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650&#176F (350&#176C)
• Effective Date: 01-Mar-2011
• Refers: ASTM A278/A278M-01(2006) - Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650&#176F (350&#176C)
• Effective Date: 01-Oct-2006
• Refers: ASTM A278/A278M-01 - Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650&#176F (350&#176C)
• Effective Date: 10-Jun-2001

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A667/A667M −87 (Reapproved 2022)
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 U.S. Department of Defense.
1. Scope A278/A278M Specification for Gray Iron Castings for
2 Pressure-Containing Parts for Temperatures Up to 650 °F
1.1 This specification covers centrifugally cast cylinders
(350 °C)
with an outer layer of white cast iron and the remainder of the
material of gray cast iron. These castings are suitable for
3. Materials and Manufacture
pressure-containing parts, the design strength of which is based
3.1 The melting procedures shall be optional with the
on the gray iron portion of the cylinder. These castings are
foundry.
suitable for service at temperatures up to 450 °F [230 °C].
3.2 The white iron portion of the cylinder shall be made to
1.2 The values stated in either SI units or inch-pound units
a minimum hardness of 55 Scleroscope “C.” The gray iron
are to be regarded separately as standard. The values stated in
portion of the cylinder shall conform to Specification A278/
each system may not be exact equivalents; therefore, each
A278M, Class 20 or Class 150.
system shall be used independently of the other. Combining
values from the two systems may result in nonconformance
3.3 The casting process shall be controlled to produce a
with the standard.
metallurgical bond between the two metal layers.
1.3 The following safety hazards caveat pertains only to the
4. Finish
test method portion, Section 8, of this specification: This
standarddoesnotpurporttoaddressallofthesafetyconcerns, 4.1 All surfaces shall be machined prior to the cylinders
being placed into service.
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser
of this standard to establish appropriate safety, health, and
5. Physical Requirements
environmental practices and determine the applicability of
regulatory limitations prior to use.
5.1 Tensile Requirements—Tension test specimens removed
1.4 This international standard was developed in accor-
from the casting shall have a tensile strength not less than 80 %
dance with internationally recognized principles on standard-
of that specified in 3.2.
ization established in the Decision on Principles for the
5.2 Thickness of White Cast Iron:
Development of International Standards, Guides and Recom-
5.2.1 The thickness of the white cast iron shall be not less
mendations issued by the World Trade Organization Technical
than 5 % nor more than 30 % of the total finished wall
Barriers to Trade (TBT) Committee.
thickness.
5.2.2 The thickness of the white cast iron shall be deter-
2. Referenced Documents
mined by ultrasonic testing.
2.1 ASTM Standards:
6. Number of Tests
6.1 The number of tension tests shall be in conformance
This specification is under the jurisdiction of Committee A04 on Iron Castings
with Specification A278/A278M.
and is the direct responsibility of Subcommittee A04.01 on Grey and White Iron
Castings.
7. Specimen Preparation
Current edition approved Oct. 1, 2022. Published October 2022. Originally
approved in 1972. Last previous edition approved in 2018 as A667/A667M – 87
7.1 Separately cast test bars may be used to represent the
(2018). DOI: 10.1520/A0667_A0667M-87R22.
gray iron portion of the castings. The test bars shall be cast in
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-667 in Section II of that Code.
core sand and have a nominal diameter of 2 in. [50 mm].
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Tension test specimens shall b
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