ASTM A518/A518M-99(2022)

Standard Specification for Corrosion-Resistant High-Silicon Iron Castings

ABSTRACT
This specification covers standards for high-silicon iron castings of Grades 1, 2, and 3 intended for severe environment corrosion-resistant services. The alloy shall be produced by any melting and casting process, or combination of processes that will be capable of meeting the specified contents of carbon, manganese, silicon, chromium, molybdenum, and copper. Reference analysis methods are given for each chemical component. Transverse bend test and hydrostatic test shall be performed. Material shall conform to minimum load at center and minimum deflection at center requirements.
SCOPE
1.1 This specification covers high-silicon cast iron castings intended for corrosion-resistant service.  
1.2 This specification covers three grades as shown in Table 1. Selection of grade depends on the corrosive service to be experienced by the casting. All three grades are suited for application in severe corrosive environments. However, Grade 2 is particularly suited for application in strong chloride environments, and Grade 3 is recommended for impressed current anodes.    
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.  
1.4 The following safety hazards caveat pertains only to the test method portion, Section 9, 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.  
1.5 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

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: A518/A518M −99 (Reapproved 2022)
Standard Specification for
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Corrosion-Resistant High-Silicon Iron Castings
This standard is issued under the fixed designationA518/A518M; 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 A438 Test Method for Transverse Testing of Gray Cast Iron
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(Withdrawn 2003)
1.1 This specification covers high-silicon cast iron castings
E350 Test Methods for Chemical Analysis of Carbon Steel,
intended for corrosion-resistant service.
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
1.2 This specification covers three grades as shown in Table
Wrought Iron
1. Selection of grade depends on the corrosive service to be
E351 Test Methods for ChemicalAnalysis of Cast Iron—All
experienced by the casting. All three grades are suited for
Types
application in severe corrosive environments. However, Grade
2 is particularly suited for application in strong chloride
3. Ordering Information
environments, and Grade 3 is recommended for impressed
3.1 Orders for material under this specification shall include
current anodes.
the following information:
1.3 The values stated in either SI units or inch-pound units
3.1.1 ASTM designation and year of issue.
are to be regarded separately as standard. The values stated in
3.1.2 Grade of high-silicon cast iron (see Section 5).
each system may not be exact equivalents; therefore, each
3.1.3 Number of castings.
system shall be used independently of the other. Combining
3.1.4 Approximate weight of the casting.
values from the two systems may result in nonconformance
3.1.5 Drawing showing the size, shape, dimensions, and
with the standard.
finishing details. The drawing should indicate any critical
dimensions and should give the allowable tolerances on all
1.4 The following safety hazards caveat pertains only to the
dimensions and on the accumulation of dimensions. If the
test method portion, Section 9, of this specification: This
purchaser supplies the pattern, the dimensions of the casting
standarddoesnotpurporttoaddressallofthesafetyconcerns,
shall conform to those predicted by the pattern.
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser
3.1.6 Options in this specification, including:
of this standard to establish appropriate safety, health, and
3.1.6.1 The status of the heat treatment of the castings when
environmental practices and determine the applicability of
shipped by the manufacturer (see Section 7).
regulatory limitations prior to use.
3.1.6.2 If the chemical analysis and mechanical test results
1.5 This international standard was developed in accor-
are to be reported to the purchaser (see Section 14).
dance with internationally recognized principles on standard-
3.1.6.3 If a transverse test is required (see 8.1).
ization established in the Decision on Principles for the
3.1.6.4 If hydraulic testing is required, and if required, the
Development of International Standards, Guides and Recom-
test pressure and the leakage permitted (see 8.2).
mendations issued by the World Trade Organization Technical
3.1.6.5 Any special packing, markings, etc.
Barriers to Trade (TBT) Committee.
4. Method of Manufacture
2. Referenced Documents
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4.1 The alloy may be produced by any melting and casting
2.1 ASTM Standards:
process, or combination of processes, capable of meeting the
chemical composition and mechanical properties specified.
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This specification is under the jurisdiction of ASTM Committee A04 on Iron
CastingsandisthedirectresponsibilityofSubcommitteeA04.01onGreyandWhite
5. Chemical Composition
Iron Castings.
Current edition approved Oct. 1, 2022. Published October 2022. Originally
5.1 High-silicon iron castings are produced in one of three
approved in 1964. Last previous edition approved in 2018 as A518/A518M – 99
grades, as given in Table 1 of this specification.
(2018). DOI: 10.1520/A0518_A0518M-99R22.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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