ASTM A518/A518M-99(2008)

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 non-conformance 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 and health practices and determine the applicability of regulatory limitations prior to use.
TABLE 1 Chemical Composition   Element
Composition, Weight %
  Grade 1
Grade 2
Grade 3
  Carbon 0.65–1.10 0.75–1.15 0.70–1.10 Manganese 1.50, max 1.50, max 1.50, max Silicon14.20–14.7514.20–14.7514.20–14.75 Chromium 0.50, max 3.25–5.00 3.25–5.00 Molybdenum 0.50, max 0.40–0.60 0.20, max Copper 0.50, max 0.50, max 0.50, max

General Information

• Status: Historical
• Publication Date: 30-Sep-2008
• 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(2003) - Standard Specification for Corrosion-Resistant High-Silicon Iron Castings
• Effective Date: 01-Oct-2008
• Replaced By: ASTM A518/A518M-99(2012) - Standard Specification for Corrosion-Resistant High-Silicon Iron Castings
• Effective Date: 01-Oct-2012
• Referred By: ASTM A861-04(2023) - Standard Specification for High-Silicon Iron Pipe and Fittings
• Effective Date: 01-Oct-2008
• Referred By: ASTM A834-95(2020) - Standard Specification for Common Requirements for Iron Castings for General Industrial Use
• Effective Date: 01-Oct-2008

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: A518/A518M −99(Reapproved 2008)
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 Department of Defense.
1. Scope E351 Test Methods for ChemicalAnalysis of Cast Iron—All
Types
1.1 This specification covers high-silicon cast iron castings
intended for corrosion-resistant service.
3. Ordering Information
1.2 This specification covers three grades as shown in Table
3.1 Orders for material under this specification shall include
1. Selection of grade depends on the corrosive service to be
the following information:
experienced by the casting. All three grades are suited for
3.1.1 ASTM designation and year of issue.
application in severe corrosive environments. However, Grade
3.1.2 Grade of high-silicon cast iron (see Section 5).
2 is particularly suited for application in strong chloride
3.1.3 Number of castings.
environments, and Grade 3 is recommended for impressed
3.1.4 Approximate weight of the casting.
current anodes.
3.1.5 Drawing showing the size, shape, dimensions, and
finishing details. The drawing should indicate any critical
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in dimensions and should give the allowable tolerances on all
dimensions and on the accumulation of dimensions. If the
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining purchaser supplies the pattern, the dimensions of the casting
shall conform to those predicted by the pattern.
values from the two systems may result in non-conformance
with the standard. 3.1.6 Options in this specification, including:
3.1.6.1 The status of the heat treatment of the castings when
1.4 The following safety hazards caveat pertains only to the
shipped by the manufacturer (see Section 7).
test method portion, Section 9, of this specification: This
3.1.6.2 If the chemical analysis and mechanical test results
standard does not purport to address all of the safety concerns,
are to be reported to the purchaser (see Section 14).
if any, associated with its use. It is the responsibility of the user
3.1.6.3 If a transverse test is required (see 8.1).
of this standard to establish appropriate safety and health
3.1.6.4 If hydraulic testing is required, and, if required, the
practices and determine the applicability of regulatory limita-
test pressure and the leakage permitted (see 8.2).
tions prior to use.
3.1.6.5 Any special packing, markings, etc.
2. Referenced Documents
4. Method of Manufacture
2
2.1 ASTM Standards:
4.1 The alloy may be produced by any melting and casting
A438 Test Method for Transverse Testing of Gray Cast Iron
3
process, or combination of processes, capable of meeting the
(Withdrawn 2003)
chemical composition and mechanical properties specified.
E350 Test Methods for Chemical Analysis of Carbon Steel,
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
5. Chemical Composition
Wrought Iron
5.1 High-silicon iron castings are produced in one of three
grades, as given in Table 1 of this specification.
1
This specification is under the jurisdiction of ASTM Committee A04 on Iron
CastingsandisthedirectresponsibilityofSubcommitteeA04.01onGreyandWhite
6. Chemical Analysis
Iron Castings.
Current edition approved Oct. 1, 2008. Published November 2008. Originally
6.1 Heat Analysis—Chemical analysis of each heat (or each
approved in 1964. Last previous edition approved in 2003 as A518/A518M – 99
tap, if from a continuous melting operation) shall be made by
(2003). DOI: 10.1520/A0518_A0518M-99R08.
2
the manufacturer to determine the percentages of the elements
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
specified in Table 1. The analysis shall be made from a test
Standards volume information, refer to the standard’s Document Summary page on
sample cast during the pouring of the heat (or tap). The
the ASTM website.
3 chemical composition thus determined shall conform to the
The last approved version of this historical standard is referenced on
www.astm.org. requirements specified for that grade in Table 1.
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