ASTM A518/A518M-99(2003)

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 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 shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Oct-1999
• 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 A518/A518M-99 - Standard Specification for Corrosion-Resistant High-Silicon Iron Castings
• Effective Date: 10-Oct-1999
• Replaced By: ASTM A518/A518M-99(2008) - Standard Specification for Corrosion-Resistant High-Silicon Iron Castings
• Effective Date: 01-Oct-2008
• Referred By: ASTM A861-04(2023) - Standard Specification for High-Silicon Iron Pipe and Fittings
• Effective Date: 10-Oct-1999
• Referred By: ASTM A834-95(2020) - Standard Specification for Common Requirements for Iron Castings for General Industrial Use
• Effective Date: 10-Oct-1999

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 518/A 518M – 99 (Reapproved 2003)
Standard Specification for
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Corrosion-Resistant High-Silicon Iron Castings
This standard is issued under the fixed designationA 518/A 518M; 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.
TABLE 1 Chemical Composition
1. Scope
Element Composition, Weight %
1.1 This specification covers high-silicon cast iron castings
Grade 1 Grade 2 Grade 3
intended for corrosion-resistant service.
1.2 This specification covers three grades as shown inTable
Carbon 0.65–1.10 0.75–1.15 0.70–1.10
Manganese 1.50, max 1.50, max 1.50, max
1. Selection of grade depends on the corrosive service to be
Silicon 14.20–14.75 14.20–14.75 14.20–14.75
experienced by the casting. All three grades are suited for
Chromium 0.50, max 3.25–5.00 3.25–5.00
application in severe corrosive environments. However, Grade Molybdenum 0.50, max 0.40–0.60 0.20, max
Copper 0.50, max 0.50, max 0.50, max
2 is particularly suited for application in strong chloride
environments, and Grade 3 is recommended for impressed
current anodes.
E 351 Test Methods for Chemical Analysis of Cast Iron—
1.3 The values stated in either inch-pound units or SI units
All Types
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
3. Ordering Information
system are not exact equivalents; therefore, each system shall
3.1 Orders for material under this specification shall include
be used independently of the other. Combining values from the
the following information:
two systems may result in nonconformance with the specifi-
3.1.1 ASTM designation and year of issue.
cation.
3.1.2 Grade of high-silicon cast iron (see Section 5).
1.4 The following safety hazards caveat pertains only to the
3.1.3 Number of castings.
test method portion, Section 9, of this specification: This
3.1.4 Approximate weight of the casting.
standard does not purport to address all of the safety concerns,
3.1.5 Drawing showing the size, shape, dimensions, and
if any, associated with its use. It is the responsibility of the user
finishing details. The drawing should indicate any critical
of this standard to establish appropriate safety and health
dimensions and should give the allowable tolerances on all
practices and determine the applicability of regulatory limita-
dimensions and on the accumulation of dimensions. If the
tions prior to use.
purchaser supplies the pattern, the dimensions of the casting
2. Referenced Documents
shall conform to those predicted by the pattern.
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3.1.6 Options in this specification, including:
2.1 ASTM Standards:
3.1.6.1 The status of the heat treatment of the castings when
A 438 TestMethodforTransverseTestingofGrayCastIron
shipped by the manufacturer (see Section 7).
E 350 Test Methods for ChemicalAnalysis of Carbon Steel,
3.1.6.2 If the chemical analysis and mechanical test results
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
are to be reported to the purchaser (see Section 14).
Wrought Iron
3.1.6.3 If a transverse test is required (see 8.1).
3.1.6.4 If hydraulic testing is required, and, if required, the
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This specification is under the jurisdiction of ASTM Committee A04 on Iron
test pressure and the leakage permitted (see 8.2).
CastingsandisthedirectresponsibilityofSubcommitteeA04.01onGreyandWhite
3.1.6.5 Any special packing, markings, etc.
Iron Castings.
Current edition approved Oct. 10, 1999. Published December 1999. Originally
4. Method of Manufacture
approved in 1964. Last previous edition approved in 1999 as A 518 – 99.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1 The alloy may be produced by any melting and casting
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
process, or combination of processes, capable of meeting the
Standards volume information, refer to the standard’s Document Summary page on
chemical composition and mechanical properties specified.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A 518/A 518M – 99 (2003)
5. Chemical Composition 6.4.4.2 Determine manganese in accordance with the sec-
tions on Manganese by the Peroxydisulfate-Arsenite Titrimet-
5.1 High-silicon iron castings are produced in one of three
ric Method in Test Methods E 350. Add hydrofluoric acid as
grades, as given in Table 1 of this specification.
required for complete solution
...