ASTM A128/A128M-93(2012)
(Specification)Standard Specification for Steel Castings, Austenitic Manganese
Standard Specification for Steel Castings, Austenitic Manganese
ABSTRACT
This specification covers Hadfield austenitic manganese steel castings and alloy modifications. 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. The steel shall conform to the requirements as to chemical composition prescribed. Weld repairs shall be inspected to the same quality standards as are used to inspect the castings.
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.
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Designation: A128/A128M −93 (Reapproved 2012)
Standard Specification for
Steel Castings, Austenitic Manganese
This standard is issued under the fixed designationA128/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 Department of Defense.
1. Scope 4.1.1 Quantity,
4.1.2 Specification, grade,
1.1 This specification covers Hadfield austenitic manganese
4.1.3 Whetheranyportionofthecastingistobechilled,and
steel castings and alloy modifications.
whether this is to be spot or full-face chilling,
1.2 The values stated in either inch-pound units or SI units
4.1.4 Special heat-treatment requirements, and
are to be regarded separately as standard. Within the text, the
4.1.5 Supplementary requirements.
SI units are shown in brackets. The values stated in each
5. Heat Treatment
system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the
5.1 The castings shall be suitably heat treated to achieve
two systems may result in nonconformance with the specifi-
toughness and ductility. This heat treatment shall consist of
cation.
uniformly heating the castings to a temperature applicable for
grade of steel produced, at least 1800°F [1000°C], and holding
2. Referenced Documents
until the temperature is uniform throughout and quenching in
2.1 ASTM Standards:
an applicable medium, normally water.
A781/A781M Specification for Castings, Steel and Alloy,
5.2 By agreement between the purchaser and the
Common Requirements, for General Industrial Use
manufacturer, castings may be furnished in a condition other
than described in 5.1.
3. General Conditions for Delivery
6. Chemical Composition
3.1 Material furnished to this specification shall conform to
the requirements of Specification A781/A781M, including any
6.1 The steel shall conform to the requirements as to
supplementary requirements that are indicated in the purchase
chemical composition prescribed in Table 1.
order. Failure to comply with the general requirements of
6.2 Contamination of the drillings by drill chips must be
Specification A781/A781M constitutes nonconformance with
avoided. Flat drills of the best highspeed steels, or drills of
this specification. In case of conflict between the requirements
some of the newer tool materials, will generally be satisfactory
of this specification and Specification A781/A781M, this
for drilling manganese steel. Manganese steel may be drilled
specification shall prevail.
best after it has been annealed for several hours at from 900 to
1100°F [500 to 600°C].
4. Ordering Information
4.1 Orders for material under this specification should
7. Repair by Welding
include the following information in proper sequence.
7.1 Defects shall be welded using a procedure and welders
capable of producing sound welds. The weld deposit shall be
1 austenitic steel in general, but welds on wearing surfaces shall
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee consist of austenitic-manganese steel.
A01.18 on Castings.
7.2 Weld repairs shall be inspected to the same quality
Current edition approved March 1, 2012. Published April 2012. Originally
approved in 1930. Last previous edition approved in 2007 as A128/A128M – 93 standards as are used to inspect the castings.
(2007). DOI: 10.1520/A0128_A0128M-93R12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8. Keywords
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
8.1 austenitic manganese steel; manganese steel; steel cast-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ings
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A128/A128M − 93 (2012)
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-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 .
...
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