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.
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. 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.
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 |
| Silicon | 14.20???14.75 | 14.20???14.75 | 14.20???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 |
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.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
A438 Test Method for Transverse Testing of Gray Cast Iron
E350 Test Methods for Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron
E351 Test Methods for Chemical Analysis of Cast Iron--All Types
Keywords
ICS Code
ICS Number Code 77.140.80 (Iron and steel castings)
DOI: 10.1520/A0518_A0518M-99R12
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