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ASTM A842-10

Historical Revision

Standard Specification for Compacted Graphite Iron Castings

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1.1 This specification covers castings made of compacted graphite iron, which is described as cast iron with the graphite in compacted (vermiform) shapes and essentially free of flake graphite.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.2.1 ExceptionThe inch-pound units in Figs. 1-3 are standard. SI units are added for information only.

1.3 No precise quantitative relationship can be stated between the properties of iron in the various locations of the same casting and those of a test bar cast from the same iron (see Appendix X1).


This specification deals with compacted graphite iron castings. These materials shall be examined metallographically for the acceptance graphite formation. The acceptable graphite formation in the microstructure of the test coupon or casting lug shall contain 80% minimum Type IV graphite. The iron shall conform to the requirements for tensile properties: tensile strength, yield strength, and elongation. Test bars and test coupons shall be cast in dried, baked, or chemically bonded molds consisting of an aggregate of silica sand with appropriate bonders and shall be subjected to the same thermal treatment as the castings they represent.


SDO ASTM: ASTM International
Document Number A842
Publication Date Dec. 1, 2010
Language en - English
Page Count 5
Revision Level 10
Supercedes
Committee A04.02
Publish Date Document Id Type View
May 1, 2011 A0842-11A Revision
Feb. 1, 2011 A0842-11 Revision
Dec. 1, 2010 A0842-10 Revision
Oct. 1, 2022 A0842-11AR22E01 Reaffirmation
Nov. 1, 2018 A0842-11AR18E01 Reaffirmation
May 1, 2009 A0842-85R09 Reaffirmation
May 1, 2004 A0842-85R04 Reaffirmation
April 10, 1997 A0842-85R97 Reaffirmation