ASTM A571/A571M-01(2011)

Standard Specification for Austenitic Ductile Iron Castings for Pressure-Containing Parts Suitable for Low-Temperature Service

ABSTRACT
This specification covers austenitic ductile iron castings for compressors, expanders, pumps, valves, and other pressure-containing parts intended primarily for low-temperature service. The castings covered here are Type D-2M, Class 1, Class 2, Class 3, and Class 4. The castings shall be made in the electric-arc furnace, induction furnace, cupola, or any other furnace which is capable of producing castings. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, silicon, manganese, nickel, chromium, and phosphorus. The castings shall undergo tension tests and impact tests, and shall conform to the following mechanical requirements: tensile strength, yield strength, elongation, Brinell hardness, and Charpy V-notch.
SCOPE
1.1 This specification covers austenitic ductile iron, Type D-2M, 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 −423°F [−252°C] (liquid hydrogen).  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3.1 Within the text, the SI units are shown in brackets.
1.4 The following precautionary caveat pertains only to the test methods 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: Historical
• Publication Date: 28-Feb-2011
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.02 - Malleable and Ductile Iron Castings

Relations

• Replaces: ASTM A571/A571M-01(2006) - Standard Specification for Austenitic Ductile Iron Castings for Pressure-Containing Parts Suitable for Low-Temperature Service
• Effective Date: 01-Mar-2011
• Replaced By: ASTM A571/A571M-01(2015) - Standard Specification for Austenitic Ductile Iron Castings for Pressure-Containing Parts Suitable for Low-Temperature Service
• Effective Date: 01-Nov-2015
• Referred By: ASTM A834-95(2020) - Standard Specification for Common Requirements for Iron Castings for General Industrial Use
• Effective Date: 01-Mar-2011

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 latest information
Designation: A571/A571M −01(Reapproved 2011)
Standard Specification for
Austenitic Ductile Iron Castings for Pressure-Containing
1
Parts Suitable for Low-Temperature Service
This standard is issued under the fixed designationA571/A571M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E23Test Methods for Notched Bar Impact Testing of Me-
2 tallic Materials
1.1 This specification covers austenitic ductile iron, Type
E30TestMethodsforChemicalAnalysisofSteel,CastIron,
D-2M, Classes 1 and 2, for compressors, expanders, pumps,
4
Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)
valves, and other pressure-containing parts intended primarily
E59Practice for Sampling Steel and Iron for Determination
for low-temperature service.
4
of Chemical Composition (Withdrawn 1996)
1.2 These grades of austenitic ductile iron are characterized
by having their graphite substantially in a spheroidal form and
3. Ordering Information
free of flake graphite.They are essentially free of carbides and
3.1 Ordersformaterialunderthisspecificationshallinclude
contain sufficient alloy content to produce a stable austenitic
the following information:
matrix down to −423°F [−252°C] (liquid hydrogen).
3.1.1 Quantity (weight or number of pieces),
1.3 The values stated in either SI units or inch-pound units
3.1.2 ASTM designation and year of issue,
are to be regarded separately as standard. The values stated in
3.1.3 Material class (Table 1),
each system may not be exact equivalents; therefore, each
3.1.4 Impact test temperature requirement (Section 11),
system shall be used independently of the other. Combining
3.1.5 Place of inspection (Section 13), and
values from the two systems may result in non-conformance
with the standard. 3.1.6 Certification requirements (Section 14).
1.3.1 Within the text, the SI units are shown in brackets.
4. Materials and Manufacture
1.4 The following precautionary caveat pertains only to the
test methods portion, Section 11, of this specification:This
4.1 Material—The iron shall be made in the electric-arc
standarddoesnotpurporttoaddressallofthesafetyconcerns,
furnace, induction furnace, cupola, or any other furnace which
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser
is capable of producing castings meeting the chemical compo-
of this standard to establish appropriate safety and health
sitions and mechanical properties in this specification.
practices and determine the applicability of regulatory limita-
4.2 Heat Treatment:
tions prior to use.
4.2.1 All castings shall be heat treated.
2. Referenced Documents 4.2.2 Heat treatment shall be performed before machining
3
except in instances when reheat treating is necessary.
2.1 ASTM Standards:
4.2.3 Heat treatment shall consist of annealing. The proce-
A941TerminologyRelatingtoSteel,StainlessSteel,Related
dure for this type treatment shall consist of heating the casting
Alloys, and Ferroalloys
to a minimum of 1600°F [870°C] but not greater than 1800°F
E8Test Methods for Tension Testing of Metallic Materials
[980°C]holdingatthattemperaturenotlessthan1h/in.[1h/25
mm] of section and furnace cooling. (See Terminology A941.)
1
This specification is under the jurisdiction of the ASTM Committee A04 on
Iron Castings and is the direct responsibility of Subcommittee A04.02 on Malleable
5. Chemical Requirements
and Ductile Iron Castings.
Current edition approved March 1, 2011. Published September 2011. Originally
5.1 Drillings taken from test coupons, broken test speci-
approved in 1966. Last previous edition approved in 2006 as A571/
mens or castings shall conform to the requirements as to
A571M–01(2006). DOI: 10.1520/A0571_A0571M-01R11.
chemical composition prescribed in Table 2.
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-571 in Section II of that code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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A571/A571M − 01 (2011)
A
TABLE 1 Mechanical Property Requirements
Class 1 Class 2 Class 3 Class 4
Tensile Strength, min, ksi [mPa] 65 60 [450] [415]
B
Yield Strength 0.2 % (offset), min, ksi [mPa] 30 25 [205] [170]
Elongation, min, % 30 25 30 25
Brinell Hardness, 30
...