ASTM-A220 › Historical Revision Information
Standard Specification for Pearlitic Malleable Iron

ASTM-A220 - 1999 R04 EDITION - SUPERSEDED
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This specification covers pearlitic malleable iron castings for general. The chemical composition of the iron shall be such as to produce the mechanical properties required by this specification. Hardness test and tensile test shall be made to conform to the requirements specified. The microstructure of the pearlitic malleable iron shall consist of temper carbon nodules uniformly distributed in a matrix of ferrite, pearlite, and tempered transformation products of austenite. All castings on visual examination, shall be sound and free from obvious shrinkage and porosity.

ORDER

Scope

1.1 This specification covers pearlitic malleable iron castings for general engineering usage at temperatures from normal ambient to approximately 750°F [400°C].

1.1.1 For continuous service at temperatures up to 1200°F [650°C] design factors should be incorporated to compensate for possible property changes, as demonstrated by Marshall and Sommer and by Pearson.

1.2 Without knowledge of casting geometry and process details, no quantitative relationship can be stated between the properties of the iron in the various locations of a casting and those of a test bar cast from the same iron.

1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the test, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

Keywords

casting; malleable iron; mechanical properties; pearlitic; tensile strength; tension test; yield strength; ICS Number Code 77.140.80 (Iron and steel castings)

To find similar documents by ASTM Volume:

01.02 (Ferrous Castings; Ferroalloys)

To find similar documents by classification:

77.140.80 (Iron and steel castings)

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Document Number

ASTM-A220/A220M-99(2004)

Revision Level

1999 R04 EDITION

Status

Superseded

Modification Type

Reapproval

Publication Date

Oct. 1, 2004

Document Type

Specification

Page Count

5 pages

Committee Number

A04.02