ASTM A667 - A 667M - 87 (2022)

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Designation: A667/A667M −87 (Reapproved 2022)
Standard Speciﬁcation for
Centrifugally Cast Dual Metal (Gray and White Cast Iron)
Cylinders
1
This standard is issued under the ﬁxed designation A667/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
1.1 This speciﬁcation
2
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 accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
3
A278/A278M Speciﬁcation for Gray Iron Castings for
Pressure-Containing Parts for Temperatures Up to 650 °F
(350 °C)
3. Materials and Manufacture
3.1 The melting procedures shall be optional with the
foundry.
3.2 The white iron portion of the cylinder shall be made to
a minimum hardness of 55 Scleroscope “C.” The gray iron
portion of the cylinder shall conform to Speciﬁcation A278/
A278M, Class 20 or Class 150.
3.3 The casting process shall be controlled to produce a
metallurgical bond between the two metal layers.
4. Finish
4.1 All surfaces shall be machined prior to the cylinders
being placed into service.
5. Physical Requirements
5.1 Tensile Requirements—Tension test specimens removed
from the casting shall have a tensile strength not less than 80 %
of that speciﬁed in 3.2.
5.2 Thickness of White Cast Iron:
5.2.1 The thickness of the white cast iron shall be not less
than 5 % nor more than 30 % of the total ﬁnished wall
thickness.
5.2.2 The thickness of the white cast iron shall be deter-
mined by ultrasonic testing.
6. Number of Tests
6.1 The number of tension tests shall be in conformance
with Speciﬁcation A278/A278M.
7. Specimen Preparation
7.1 Separately cast test bars may be used to represent the
gray iron portion of the castings. The test bars shall be cast in
core sand and have a nominal diameter of 2 in. [50 mm].
Tension test specimens shall be machined from test bars to the
dimensions given for Specimen C in Speciﬁcation A278/
A278M.
1
This speciﬁcation is under the jurisdiction of Committee A04 on Iron Castings
and is the direct responsibility of Subcommittee A04.01 on Grey and White Iron
Castings.
Current edition approved Oct. 1, 2022. Published October 2022. Originally
approved in 1972. Last previous edition approved in 2018 as A667/A667M – 87
(2018). DOI: 10.1520/A0667_A0667M-87R22.
2
For ASME Boiler and Pressure Vessel Code applications, see related Speciﬁ-
cation SA-667 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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.
1

7.2 At the option of the manufacturer he may substitute test

bars taken from the gray iron portion of the casting. The test

bars shall be taken midway between the inside diameter of the

casting and the interface between the two layers. Tension test

specimens machined from these test bars shall conform to the

dimensions shown for Specimen C in Speciﬁcation A278/

A278M.

8. Test Method

8.1 Tension test specimens shall ﬁt the holders of the testing

machine in such a way that the load shall be axial. The use of

self-aligning shackles is suggested. After reaching a stress

equivalent to 15 000 psi [100 MPa], the speed of the moving

head of the testing machine shall not exceed

⁄

in.

[3.2 mm] ⁄min.

9. Inspection

9.1 The inspector representing the purchaser shall have free

entry at all times while work on the contract of the purchaser

is being performed to all parts of the manufacturer’s works that

concern the manufacture of the material ordered. The manu-

facturer shall afford the inspector without charge all reasonable

facilities to satisfy him that the material is being furnished in

accordance with this speciﬁcation. All tests and inspections

shall be made at the place of manufacture prior to the shipment

unless otherwise speciﬁed, and shall be so conducted as not to

interfere unnecessarily with the operation of the works.

10. Acceptance and Certiﬁcation

10.1 Final acceptance of the casting shall follow complete

machining of the casting. Upon request of the purchaser and

when so speciﬁed in the purchase order, a certiﬁcation shall be

made on the basis of acceptance of the material. This shall

consist of a copy of the manufacturer’s test report or a

statement by the supplier accompanied by a copy of the test

results that the material has been sampled, tested, and inspected

in accordance with the provisions of this speciﬁcation. Each

certiﬁcation so furnished shall be signed by an authorized agent

of the supplier or manufacturer.

11. Product Marking

11.1 Pressure-containing castings made in accordance with

this speciﬁcation shall have the name of the manufacturer or

his recognized trademark and the class of iron to which it

conforms cast or indelibly stamped on the surface indicated by

the purchaser or in such a position as not to injure the

usefulness of the casting.

ASTM International 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 International 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, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website

(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222

Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/

A667/A667M − 87 (2022)

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摘要：

ASTM A667 - A 667M - 87 (2022) 是一份由美国材料与试验协会发布的标准化技术规范，主要涵盖离心铸造的、经时效硬化的铁素体/奥氏体不锈钢管件的技术要求。该标准适用于高温及腐蚀性环境下的工业应用，包括炼油、化工和热处理设备等领域。最新版本再次确认了2022年的有效性，确保材料在化学成分、拉伸性能与尺寸公差等方面符合长期可靠性要求。本规范对于从事高温合金材料采购、质量检验与管道系统设计的工程师具有重要参考价值，有助于提升产品一致性和安全合规性。

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