ASTM A128/A128M-93(2007)
(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 2007)
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 4.1.2 Specification, grade,
4.1.3 Whetheranyportionofthecastingistobechilled,and
1.1 This specification covers Hadfield austenitic manganese
whether this is to be spot or full-face chilling,
steel castings and alloy modifications.
4.1.4 Special heat-treatment requirements, and
1.2 The values stated in either inch-pound units or SI units
4.1.5 Supplementary requirements.
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
5. Heat Treatment
system are not exact equivalents; therefore, each system must
5.1 The castings shall be suitably heat treated to achieve
be used independently of the other. Combining values from the
toughness and ductility. This heat treatment shall consist of
two systems may result in nonconformance with the specifi-
uniformly heating the castings to a temperature applicable for
cation.
grade of steel produced, at least 1800°F [1000°C], and holding
2. Referenced Documents until the temperature is uniform throughout and quenching in
an applicable medium, normally water.
2.1 ASTM Standards:
5.2 By agreement between the purchaser and the manufac-
A781/A781M Specification for Castings, Steel and Alloy,
turer, castings may be furnished in a condition other than
Common Requirements, for General Industrial Use
described in 5.1.
3. General Conditions for Delivery
6. Chemical Composition
3.1 Material furnished to this specification shall conform to
6.1 The steel shall conform to the requirements as to
the requirements of SpecificationA781/A781M, including any
chemical composition prescribed in Table 1.
supplementary requirements that are indicated in the purchase
6.2 Contamination of the drillings by drill chips must be
order. Failure to comply with the general requirements of
avoided. Flat drills of the best highspeed steels, or drills of
Specification A781/A781M constitutes nonconformance with
some of the newer tool materials, will generally be satisfactory
this specification. In case of conflict between the requirements
for drilling manganese steel. Manganese steel may be drilled
of this specification and Specification A781/A781M, this
best after it has been annealed for several hours at from 900 to
specification shall prevail.
1100°F [500 to 600°C].
4. Ordering Information
7. Repair by Welding
4.1 Orders for material under this specification should
7.1 Defects shall be welded using a procedure and welders
include the following information in proper sequence.
capable of producing sound welds. The weld deposit shall be
4.1.1 Quantity,
austenitic steel in general, but welds on wearing surfaces shall
consist of austenitic-manganese steel.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
7.2 Weld repairs shall be inspected to the same quality
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
standards as are used to inspect the castings.
A01.18 on Castings.
Current edition approved Nov. 1, 2007. Published November 2007. Originally
8. Keywords
approved in 1930. Last previous edition approved in 2003 as A128/A128M – 93
(2003). DOI: 10.1520/A0128_A0128M-93R07.
8.1 austenitic manganese steel; manganese steel; steel
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
castings
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.
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A128/A128M – 93 (2007)
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 . .
...
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