ASTM A439-83(2004)

ASTM A439-83(2004) - 1.10.2004

1. Scope

1.1 This specification covers austenitic ductile iron castings, which are used primarily for their resistance to heat, corrosion, and wear, and for other special purposes.

1.2 Austenitic ductile iron, also known as austenitic nodular iron or austenitic spheroidal iron, is characterized by having its graphite substantially in a spheroidal form and substantially free of flake graphite. It contains some carbides and sufficient alloy content to produce an austenitic structure.

1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

2. Referenced Documents

A732/A732M-25	Standard Specification for Castings, Investment, Carbon and Low-Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
A370-26	Standard Test Methods and Definitions for Mechanical Testing of Steel Products
E30-89	Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)
E59-93	Practice for Sampling Steel and Iron for Determination of Chemical Composition (Withdrawn 1996)
E351-25	Standard Test Methods for Chemical Analysis of Cast Iron—All Types
E8-04	Standard Test Methods for Tension Testing of Metallic Materials