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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.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A278/A278M Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650F (350C)
ICS Number Code 77.140.80 (Iron and steel castings)
UNSPSC Code 31102005(Iron centrifugal casting)
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ASTM A667 / A667M-87(2012), Standard Specification for Centrifugally Cast Dual Metal (Gray and White Cast Iron) Cylinders, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top