ASTM A220 / A220M

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.

2. Referenced Documents

A220M Specification for Pearlitic Malleable Iron (Metric)
A247 Test Method for Evaluating the Microstructure of Graphite in Iron Castings
A644 Terminology Relating to Iron Castings
E10 Test Method for Brinell Hardness of Metallic Materials
E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness
E18 Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
E8 Test Methods for Tension Testing of Metallic Materials
MIL-STD-129 Marking for Shipment and Storage
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)

Index Terms

casting; malleable iron; mechanical properties; pearlitic; tensile strength; tension test; yield strength; ICS Number Code 77.140.80

Citing ASTM Standards

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