ASTM-A439 › Historical Revision Information
Standard Specification for Austenitic Ductile Iron Castings

ASTM-A439 - 2015 EDITION - SUPERSEDED
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This specification covers austenitic ductile iron castings used for their resistance to heat, corrosion and wear. The castings shall be melt processed using cupolas, air furnaces, electric furnaces or crucible furnaces. The iron castings shall undergo magnetic permeability test. Samples taken from test coupons, broken test specimens, or castings shall conform to the required chemical compositions of carbon, silicon, manganese, phosphorus, nickel and chromium. Mechanical tests shall be performed wherein the iron casting specimens shall conform to the required values of tensile strength, yield strength, elongation and Brinell hardness.

ORDER

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

Keywords

austenitic; corrosion resistant; ductile iron; mechanical properties; nodular iron; tensile strength; 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-A439/A439M-15

Revision Level

2015 EDITION

Status

Superseded

Modification Type

Revision with Designation Change

Publication Date

Dec. 1, 2015

Document Type

Specification

Page Count

7 pages

Committee Number

A04.02