ASTM A128/A128M-19

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Designation: A128/A128M − 93 (Reapproved 2017) A128/A128M − 19
Standard Specification for
Steel Castings, Austenitic Manganese
This standard is issued under the fixed designation A128/A128M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Scope*
1.1 This specification covers Hadfield austenitic manganese steel castings and alloy modifications.
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used
independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
3. General Conditions for Delivery
3.1 Material furnished to this specification shall conform to the requirements of Specification A781/A781M, including any
supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of
Specification A781/A781M constitutes nonconformance with this specification. In case of conflict between the requirements of this
specification and Specification A781/A781M, this specification shall prevail.
4. Ordering Information
4.1 Orders for material under this specification should include the following information in proper sequence. sequence:
4.1.1 Quantity,
4.1.2 Specification, grade,
4.1.3 Whether any portion of the casting is to be chilled, and whether this is to be spot or full-face chilling,
4.1.4 Special heat-treatment heat treatment requirements, and
4.1.5 Supplementary requirements.
5. Heat Treatment
5.1 The castings shall be suitably heat treated to achieve toughness and ductility. This heat treatment shall consist of uniformly
heating the castings to a temperature applicable for grade of steel produced, at least 1800 °F [1000 °C], and holding until the
temperature is uniform throughout and quenching in an applicable medium, normally water.
5.2 By agreement between the purchaser and the manufacturer, castings may be furnished in a condition other than described
in 5.1.
6. Chemical Composition
6.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1.
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved March 15, 2017May 1, 2019. Published March 2017May 2019. Originally approved in 1930. Last previous edition approved in 20122017 as
A128/A128M – 93 (2012).(2017). DOI: 10.1520/A0128_A0128M-93R17. 10.1520/A0128_A0128M-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
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A128/A128M − 19
TABLE 1 Chemical Requirements
Composition, %
A
Grade
Carbon Manganese Chromium Molybdenum Nickel Silicon Phosphorus
B
A 1.05–1.35 11.0 min . . . 1.00 max 0.07 max
B-1 0.9 –1.05 11.5–14.0 . . . 1.00 max 0.07 max
B-1 0.9–1.05 11.5–14.0 . . . 1.00 max 0.07 max
B-2 1.05–1.2 11.5–14.0 . . . 1.00 max 0.07 max
B-3 1.12–1.28 11.5–14.0 . . . 1.00 max 0.07 max
B-4 1.2 –1.35 11.5–14.0 . . . 1.00 max 0.07 max
B-4 1.2–1.35 11.5–14.0 . . . 1.00 max 0.07 max
C 1.05–1.35 11.5–14.0 1.5–2.5 . . 1.00 max 0.07 max
D 0.7 –1.3 11.5–14.0 . . 3.0–4.0 1.00 max 0.07 max
D 0.7–1.3 11.5–14.0 . . 3.0–4.0 1.00 max 0.07 max
E-1 0.7 –1.3 11.5–14.0 . 0.9–1.2 . 1.00 max 0.07 max
E-1 0.7–1.3 11.5–14.0 . 0.9–1.2 . 1.00 max 0.07 max
E-2 1.05–1.45 11.5–14.0 . 1.8–2.1 . 1.00 max 0.07 max
F (J91340) 1.05–1.35 6.0–8.0 . 0.9–1.2 . 1.00 max 0.07 max
A
Section size precludes the use of all grades, and the producer should be consulted as to gra
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