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This specification covers general requirements and corresponding test methods for castings made of high-silicon molybdenum ferritic iron (SiMo). The requirements are prescribed for castings with microstructures of spheroidal graphite (SG) SiMo iron, compacted graphite (CG) SiMo iron, and mixed graphite or medium-nodularity graphite (MG) SiMo iron. MG iron microstructure is comprised of a mixture of spheroidal and compacted graphite shapes.
This specification covers: ordering information (including grade of silicon-molybdenum ferritic iron required, chemical composition requirements, microstructure and mechanical requirements, and special preparation for delivery); material, structural performance, and manufacturing practice; mechanical and chemical composition; workmanship, finish, and appearance; inspection and quality; certification; product marking; and packaging and package marking.
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.
1.1 This specification covers castings made of high-silicon molybdenum ferritic iron, commonly known as SiMo. This specification includes castings with microstructures of spheroidal graphite (SG) SiMo iron, compacted graphite (CG) SiMo iron, and mixed graphite or medium-nodularity graphite (MG) SiMo iron. MG iron microstructure comprises a mixture of spheroidal and compacted graphite shapes. This standard specifies the condition, chemical composition, microstructure, and other technical requirements of three grades of ferritic cast irons, specified as SG SiMo, MG SiMo, and CG SiMo.
1.2 No precise quantitative relationship can be stated between the properties of iron in the various locations of the same casting or between the properties of castings and those of a test specimen cast from the same iron.
1.3 The values stated in SI units are to be regarded as standard. All chemical compositions are in mass percentage. No other units of measurement are included in this standard.
1.4 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.
A247 Test Method for Evaluating the Microstructure of Graphite in Iron Castings
A395 Specification for Ferritic Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures
A476/A476M Specification for Ductile Iron Castings for Paper Mill Dryer Rolls
A536 Specification for Ductile Iron Castings
A834 Specification for Common Requirements for Iron Castings for General Industrial Use
A842 Specification for Compacted Graphite Iron Castings
A897/A897M Specification for Austempered Ductile Iron Castings
D1976 Test Method for Elements in Water by Inductively-Coupled Argon Plasma Atomic Emission Spectroscopy
D5381 Guide for X-Ray Fluorescence (XRF) Spectroscopy of Pigments and Extenders
E8/E8M Test Methods for Tension Testing of Metallic Materials
E10 Test Method for Brinell Hardness of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E351 Test Methods for Chemical Analysis of Cast Iron--All Types
E1184 Practice for Determination of Elements by Graphite Furnace Atomic Absorption Spectrometry
E1999 Test Method for Analysis of Cast Iron by Spark Atomic Emission Spectrometry
SAE (Society of Automotive Engineers) International StandardsJ434 Automotive Ductile (Nodular) Iron Castings J1887 Automotive Compacted Graphite Iron Castings
American National StandardMIL-STD-129 Military Marking for Shipment and Storage
ICS Number Code 77.080.10 (Irons)
UNSPSC Code 31100000(Castings and casting assemblies)
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ASTM A1095-15, Standard Specification for High-Silicon Molybdenum Ferritic Iron Castings, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top