ASTM A571M-84(1997)

Standard Specification for Austenitic Ductile Iron Castings for Pressure-Containing Parts Suitable for Low-Temperature Service [Metric] (Withdrawn 2001)

SCOPE
1.1 This specification covers austenitic ductile iron, Type D2M, Classes 1 and 2, for compressors, expanders, pumps, valves, and other pressure-containing parts intended primarily for low-temperature service.
1.2 These grades of austenitic ductile iron are characterized by having their graphite substantially in a spheroidal form and free of flake graphite. They are essentially free of carbides and contain sufficient alloy content to produce a stable austenitic matrix down to -252oC (liquid hydrogen).
1.3 This specification covers only SI units and is not to be used or confused with inch-pound units.
Note 1--This specification is the metric counterpart of Specification A571.
The following precautionary caveat pertains only to the test method portion, Section 11, of this specification:This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Withdrawn
• Publication Date: 09-Apr-1997
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.02 - Malleable and Ductile Iron Castings

Relations

• Replaced By: ASTM A571/A571M-01(2019) - Standard Specification for Austenitic Ductile Iron Castings for Pressure-Containing Parts Suitable for Low-Temperature Service
• Effective Date: 10-Apr-1997

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 571M – 84 (Reapproved 1997)
METRIC
Standard Specification for
Austenitic Ductile Iron Castings for Pressure-Containing
Parts Suitable for Low-Temperature Service [Metric]
This standard is issued under the fixed designation A 571M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Ordering Information
1.1 This specification covers austenitic ductile iron, Type 3.1 Orders for material under this specification shall include
D2M, Classes 1 and 2, for compressors, expanders, pumps, the following information:
valves, and other pressure-containing parts intended primarily 3.1.1 Quantity (weight or number of pieces),
for low-temperature service. 3.1.2 ASTM designation and year of issue,
1.2 These grades of austenitic ductile iron are characterized 3.1.3 Impact test temperature requirement,
by having their graphite substantially in a spheroidal form and 3.1.4 Place of inspection (Section 13), and
free of flake graphite. They are essentially free of carbides and 3.1.5 Certification requirements (Section 14).
contain sufficient alloy content to produce a stable austenitic
4. Materials and Manufacture
matrix down to −252°C (liquid hydrogen).
4.1 Material—The iron shall be made in the electric-arc
1.3 This specification covers only SI units and is not to be
used or confused with inch-pound units. furnace, induction furnace, cupola, or any other furnace which
is capable of producing castings meeting the chemical compo-
NOTE 1—This specification is the metric counterpart of Specification
sitions and mechanical properties in this specification.
A 571.
4.2 Heat Treatment:
1.4 The following precautionary caveat pertains only to the
4.2.1 All castings shall be heat treated.
test method portion, Section 11, of this specification: This
4.2.2 Heat treatment shall be performed before machining
standard does not purport to address all of the safety concerns,
except in instances when reheat treating is necessary.
if any, associated with its use. It is the responsibility of the user
4.2.3 Heat treatment shall consist of annealing. The proce-
of this standard to establish appropriate safety and health
dure for this type treatment shall consist of heating the casting
practices and determine the applicability of regulatory limita-
to a minimum of 870°C but not greater than 980°C holding at
tions prior to use.
that temperature not less than 1 h/in. of section and furnace
cooling. (See Terminology A 919.)
2. Referenced Documents
2.1 ASTM Standards:
5. Chemical Requirements
A 919 Terminology Relating to Heat Treatment of Metals
5.1 Drillings taken from test coupons, broken test speci-
E 8 Test Methods for Tension Testing of Metallic Materials
mens or castings shall conform to the requirements as to
E 23 Test Methods for Notched Bar Impact Testing of
chemical composition prescribed in Table 1.
Metallic Materials
5.2 The chemical analysis for total carbon shall be made on
E 30 Test Methods for Chemical Analysis of Steel, Cast
either chilled cast pencil-type specimens or thin wafers ap-
Iron, Open-Hearth Iron, and Wrought Iron
proximately 0.8 mm thick cut from test coupons. Drillings shall
E 59 Practice for Sampling Steel and Iron for Determination
not be used because of attendant loss of graphite.
of Chemical Composition
6. Physical Property Requirements
6.1 Tensile Properties—The room temperature mechanical
This specification is under the jurisdiction of ASTM Committee A-4 on Iron
properties of the two classes of ductile iron used for the casting
Castings and is the direct responsibility of Subcommittee A04.02 on Malleable and
shall conform to the requirements for the heat treated condition
Ductile Iron Castings.
shown in Table 2.
Current edition approved June 15, 1984. Published August 1984.
For ASME Boiler and Pressure Vessel Code applications see related Specifi- 6.2 Impact Properties—The notched-bar impact properties
cation SA-571 in Section II of that code.
of the materials shall be determined by testing a set of three
Annual Book of ASTM Standards, Vol 01.01.
Charpy V-notch impact specimens to the energy absorption
Annual Book of ASTM Standards, Vol 03.01.
requirements shown in Table 2. The test temperature shall be
Annual Book of ASTM Standards, Vol 03.05.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
A 571M
TABLE 1 Chemical Requirements
from injurious defects. Surfaces of the castings shall be free of
Element Composition, % burnt-on sand and shall be reasonably smooth. Runners, risers,
A
fins, and other useless cast-on pieces shall be removed. In other
Total carbon 2.2–2.7
Silicon 1.5–2.50
respects the castings shall conform to whatever points may be
Manganese 3.75–4.5
specifically agreed upon between the manufacturer and the
Nickel 21.0–24.0
B
purchaser.
Chromium 0.20 max
Phosphorus 0.08 max
8. Sampling
A
For castings with sections under 6 mm, it may be desirable to adjust the
carbon upwards to a maximum of 2.90 %. 8.1 The standard test coupons shall be the 25-mm “Y” block
B
Not intentionally added.
and 25-mm keel block as shown in Fig. 1 and Fig. 2,
respectively.
A
TABLE 2 Mechanical Property Requirements
8.2 The separately cast test coupons from which the tension
Class 1 Class 2
test specimens are machined shall be cast to the size and shape
Tensile strength, min, MPa 450 415 shown in Fig. 1 or Fig. 2. The size of coupon cast to represent
B
Yield strength 0.2 %, min, MPa 205 170
the casting shall be at the option of the purchaser. In case no
Elongation, min, % 30 25
option is expressed, the manufacturer shall make the choice.
Brinell Hardness, 3000 kgf 121 to 171 111 to 171
Charpy V-notch, 8.3 Test coupons shall be poured immediately after the
Minimum, average 3 tests 20 27
castings and from the same ladle of metal. Test coupons shall
C
Minimum, individual test 16 20
be left in the mold until they have cooled black. Test coupons
A
Heat treated condition.
shall be included in the same furnace load as the castings they
B
Yield strength shall be determined at 0.2 % offset by the offset method, see
Test Methods E 8. Other methods may be agreed upon by mutual consent of represent.
manufacturer and purchaser.
C 9. Number of Tests and Retests
Not more than one test in a set of three may be below the minimum average
required for the set of three.
9.1 Test coupons shall be poured from each ladle treated
with nodulizing agent unless otherwise specified.
agreed upon by the manufacturer and the purchaser. The energy
9.2 The number of representative coupons poured and tested
absorption value shown in Table 2 are applicable at tempera- shall be established by the manufacturer, unless otherwise
tures down to and including −195°C. agreed upon with the purchaser.
6.3 Brinell Hardness—The room temperature hardness of 9.3 One tension test at room temperature and three impact
test bars and castings shall conform to the requirements of tests at the required temperature shall be performed from each
Table 2. ladle treated with nodulizing agent unless otherwise specified.
9.4 If any test specimens (tension or impact) show obvious
7. Wo
...