ASTM A47M-90

Standard Specification for Ferritic Malleable Iron Castings [Metric]

General Information

• Status: Historical
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.02 - Malleable and Ductile Iron Castings

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn
Contact ASTM International (www.astm.org) for the lastest information
Designation: A 47M - 90
METRIC
Standard Specification for
Ferritic Malleable Iron Castings [Metric]1
This standard is issued under the fixed designation A 47M; 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 (c) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
1. Scope 4. Classification
1.1 This specification2 covers ferritic malleable castings 4.1 Castings ordered and produced under this specifica-
for general engineering usage at temperatures from normal tion are classified under the following grades based on tests
ambient to approximately 400°C. on separately cast test bars. Separately cast test bars shall be
1.2 No precise quantitative relationship can be stated poured from the same lot of iron as the castings they
between the properties of the iron in various locations of the represent and shall be heat treated with those castings except
same casting and those of a test specimen cast from the same as provided in 7.2.1.3.
iron (see Appendix XI). 4.1.1 Grade 22010.
4.1.1.1 The first three digits of the grade designation
NOTE—This specification is the metric counterpart of Specification
indicate the minimum yield strength (MPa) and the last two
A 47.
digits indicate the minimum elongation (% in 50 mm).
2. Referenced Documents
5. Ordering Information
2.1 ASTM Standards:
5.1 The purchase order for castings ordered under this
A 153 Specification for Zinc Coating (Hot-Dip) on Iron
specification shall state the specification designation, the year
and Steel Hardware3
in which the specification was issued, and the grade of
A 247 Test Method for Evaluating the Microstructure of
malleable iron to be supplied. Any option or special addi-
Graphite in Iron Castings4
tions to the basic requirements of this specification shall be
A 644 Terminology Relating to Iron Castings4
clearly and fully stipulated.
E 8 Test Methods for Tension Testing of Metallic
Materials5
6. Chemical Composition
E 10 Test Method for Brinell Hardness of Metallic
6.1 The chemical composition of the iron shall be such as
Materials5
to produce the structural and mechanical properties required
E 18 Test Methods for Rockwell Hardness and Rockwell
by this specification.
Superficial Hardness of Metallic Materials5
E 140 Hardness Conversion Tables for Metals (Rela-
7. Mechanical Properties
tionship Between Brinell Hardness, Vickers Hardness,
7.1 Factors influencing the properties of castings and their
Rockwell Hardness, Rockwell Superficial Hardness, and
relationship to those of test specimens and separate test
Knoop Hardness)5
castings are discussed in Appendix X1.
2.2 Military Standard:
7.2 Tension Test Specimens:
MIL-STD-129 Marking for Shipment and Storage6
7.2.1 The tension test specimens shall be cast to the form
2.3 Federal Standard:
and dimensions shown in Fig. 1 or Fig. 2, in the same kind of
Fed. Std. No. 123 Marking for Domestic Shipment (Ci-
molding material used for the production castings. At least
vilian Agencies)6
three such specimens shall be cast from a representative ladle
of iron either from each batch-melted heat or, in continuous
3. Terminology
melting, from each 4-h pour period during which the
3.1 Definitions—Definitions for many terms common to
purchaser's castings were poured, or as otherwise agreed
iron are found in Terminology A 644.
upon between manufacturer and purchaser.
7.2.2 All test specimens shall be suitably identified with
the designation of either the batch-melted heat or the pour
1 This specification is under the jurisdiction of ASTM Committee A-4 on Iron
period of a continuous heat.
Castings and is the direct responsibility of Subcommittee A04.02 on Malleable
Iron Castings.
7.2.3 All test specimens shall be heat treated in the same
Current edition approved Sept. 28, 1990. Published November 1990. Originally
production furnaces and in the same cycles as the castings
published as A 47M - 84. Last previous edition A 47M - 84 (1989)".
they represent. However, in those instances wherein the
2 For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-47 in Section II of that Code. critical sections of the production castings differ appreciably
3 Annual Book of ASTM Standards. Vol 01.06.
from that of the central portion of the test specimens, the
4 Annual Book of ASTM Standards. Vol 01.02.
time cycle for tempering the test specimens may
...