ASTM A1095-15(2023)

Standard Specification for High-Silicon Molybdenum Ferritic Iron Castings

ABSTRACT
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.
SCOPE
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, 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-2023
• ICS: 77.080.10 - Irons
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.02 - Malleable and Ductile Iron Castings

Relations

• Replaces: ASTM A1095-15(2019) - Standard Specification for High-Silicon Molybdenum Ferritic Iron Castings
• Effective Date: 01-Oct-2023

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: A1095 − 15 (Reapproved 2023)
Standard Specification for
1
High-Silicon Molybdenum Ferritic Iron Castings
This standard is issued under the fixed designation A1095; 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.
1. Scope Graphite in Iron Castings
A395/A395M Specification for Ferritic Ductile Iron
1.1 This specification covers castings made of high-silicon
Pressure-Retaining Castings for Use at Elevated Tempera-
molybdenum ferritic iron, commonly known as SiMo. This
tures
specification includes castings with microstructures of spheroi-
A476/A476M Specification for Ductile Iron Castings for
dal graphite (SG) SiMo iron, compacted graphite (CG) SiMo
Paper Mill Dryer Rolls
iron, and mixed graphite or medium-nodularity graphite (MG)
A536 Specification for Ductile Iron Castings
SiMo iron. MG iron microstructure comprises a mixture of
A834 Specification for Common Requirements for Iron
spheroidal and compacted graphite shapes. This standard
Castings for General Industrial Use
specifies the condition, chemical composition, microstructure,
A842 Specification for Compacted Graphite Iron Castings
and other technical requirements of three grades of ferritic cast
A897/A897M Specification for Austempered Ductile Iron
irons, specified as SG SiMo, MG SiMo, and CG SiMo.
Castings
1.2 No precise quantitative relationship can be stated be-
D1976 Test Method for Elements in Water by Inductively-
tween the properties of iron in the various locations of the same
Coupled Plasma Atomic Emission Spectroscopy
casting or between the properties of castings and those of a test
D5381 Guide for X-Ray Fluorescence (XRF) Spectroscopy
specimen cast from the same iron.
of Pigments and Extenders
1.3 The values stated in SI units are to be regarded as E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
standard. All chemical compositions are in mass percentage.
No other units of measurement are included in this standard. E10 Test Method for Brinell Hardness of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of
1.4 This standard does not purport to address all of the
Metallic Materials
safety concerns, if any, associated with its use. It is the
E228 Test Method for Linear Thermal Expansion of Solid
responsibility of the user of this standard to establish appro-
Materials With a Push-Rod Dilatometer
priate safety, health, and environmental practices and deter-
E351 Test Methods for Chemical Analysis of Cast Iron—All
mine the applicability of regulatory limitations prior to use.
Types
1.5 This international standard was developed in accor-
E1184 Practice for Determination of Elements by Graphite
dance with internationally recognized principles on standard-
Furnace Atomic Absorption Spectrometry
ization established in the Decision on Principles for the
E1999 Test Method for Analysis of Cast Iron by Spark
Development of International Standards, Guides and Recom-
Atomic Emission Spectrometry
mendations issued by the World Trade Organization Technical
2.2 SAE (Society of Automotive Engineers) International
Barriers to Trade (TBT) Committee.
Standards:
2. Referenced Documents J434 Automotive Ductile (Nodular) Iron Castings
J1887 Automotive Compacted Graphite Iron Castings
2
2.1 ASTM Standards:
J2582 Automotive Ductile Iron Castings for High Tempera-
A247 Test Method for Evaluating the Microstructure of
ture Applications
2.3 Federal Standard:
1
FED-STD-123 Marking for Shipment (Civil Agencies)
This specification is under the jurisdiction of ASTM Committee A04 on Iron
Castings and is the direct responsibility of Subcommittee A04.02 on Malleable and
2.4 American National Standard:
Ductile Iron Castings.
MIL-STD-129 Military Marking for Shipment and Storage
Current edition approved Oct. 1, 2023. Published October 2023. Originally
2.5 Other Publications:
approved in 2015. Last previous edition approved in 2019 as A1095 – 15 (2019).
DOI: 10.1520/A1095-15R23.
AFS (American Foundry Society), Foundrymen’s Guide to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Ductile Iron Microstructures, 1984
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
AFS, Iron Castings Engineering Handbook, 2004
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ASM Specialty Handbook, Cast Irons, 1999
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