ASTM A874/A874M-98

Standard Specification for Ferritic Ductile Iron Castings Suitable for Low-Temperature Service

SCOPE
1.1 This specification covers ductile iron castings suitable for service at temperatures of -40°F and above.
1.2 The values stated in inch-pound units are to be regarded as the standard. Note-A complete metric companion to Specification A874 has been developed-A874M; therefore, no metric equivalents are presented in this specification.
1.3 The following precautionary statement pertains only to the test methods portion, Section 11, of this specification: This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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: 09-Oct-1998
• 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 A874/A874M-98(2004) - Standard Specification for Ferritic Ductile Iron Castings Suitable for Low-Temperature Service
• Effective Date: 01-Oct-2004
• Referred By: ASTM A834-95(2020) - Standard Specification for Common Requirements for Iron Castings for General Industrial Use
• Effective Date: 10-Oct-1998

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 874/A 874M – 98
Standard Specification for
Ferritic Ductile Iron Castings Suitable for Low-Temperature
Service
This standard is issued under the fixed designation A 874/A 874M; 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 E 709 Guide for Magnetic Particle Examination
1.1 This specification covers ductile iron castings suitable
3. Ordering Information
for service at temperatures of −40°F [–40°C] and above.
3.1 Orders for material under this specification shall include
1.2 The values stated in either inch-pound or SI units are to
the following applicable information:
be regarded separately as standard. Within the text, the SI units
3.1.1 Drawing, catalog number, or part identification,
are shown in brackets. The values stated in each system are not
3.1.2 Quantity (weight or number of pieces),
exact equivalents; therefore, each system shall be used inde-
3.1.3 ASTM designation and year of issue,
pendently of the other. Combining values from the two systems
3.1.4 Marking instructions (see Section 15),
may result in nonconformance with the specification.
3.1.5 Place of inspection (see 13.1),
1.3 The following precautionary statement pertains only to
3.1.6 Limits on residual elements (see 5.2),
the test methods portion, Section 11, of this specification: This
3.1.7 Visual and dimensional acceptance standard (see 7.1),
standard does not purport to address all of the safety concerns,
3.1.8 Sampling plan (see Section 9), and
if any, associated with its use. It is the responsibility of the user
3.1.9 Supplementary requirements.
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
4. Materials and Manufacture
tions prior to use.
4.1 Castings may be supplied either as cast or heat treated
and shall have essentially a ferritic structure that contains no
2. Referenced Documents
massive carbides.
2.1 ASTM Standards:
A 247 Test Method for Evaluating the Microstructure of
5. Chemical Composition
Graphite in Iron Castings
5.1 The iron shall conform to the requirements for chemical
E 8 Test Methods for Tension Testing of Metallic Materials
composition shown in Table 1.
E 30 Test Methods for Chemical Analysis of Steel, Cast
5.2 By agreement between the manufacturer and purchaser,
Iron, Open-Hearth Iron, and Wrought Iron
analysis may be required and limits established for elements
E 59 Practice for Sampling Steel and Iron for Determination
not specified in Table 1.
of Chemical Composition
E 94 Guide for Radiographic Testing
6. Mechanical and Microstructural Properties
E 165 Test Method for Liquid Penetrant Examination
6.1 Tensile Properties—The iron shall conform to the re-
E 351 Test Methods for Chemical Analysis of Cast Iron—
quirements for tensile properties shown in Table 2.
All Types
6.2 Microstructure—Graphite contained in the microstruc-
E 562 Practice for Determining Volume Fraction by Sys-
3 ture shall be evaluated in accordance with Test Method A 247.
tematic Manual Point Count
The percent of each graphite type shall be estimated, and the
E 689 Reference Radiographs for Ductile Iron Castings
total of all estimates shall equal 100 %. The total percent of
Types 1 and 2 graphite shall be a minimum of 90 %.
This specification is under the jurisdiction of ASTM Committee A-4 on Iron
7. Workmanship, Finish, and Appearance
Castings and is the direct responsibility of Subcommittee A04.02 on Malleable and
Ductile Iron Castings.
7.1 The surface of the casting shall be examined visually
Current edition approved Oct. 10, 1998. Published February 1999.
2 and shall be free from adhering sand, scale, cracks, and hot
Annual Book of ASTM Standards, Vol 01.02.
tears. Other surface discontinuities shall meet visual and
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 03.05.
dimensional acceptance standards specified in the order.
Annual Book of ASTM Standards, Vol 03.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 874/A 874M
TABLE 1 Chemical Composition
11.2 Determine the yield strength using one of the following
Element Minimum, % Maximum, % methods:
Total carbon 3.0 3.7 11.2.1 The 0.2 % offset method, or
Carbon equivalent (carbon + ⁄3 silicon) . . . 4.5
11.2.2 Extension under load method where the yield
Silicon 1.2 2.3
Phosphorous . . . 0.03 strength may be determined as the stress producing an elonga-
Magnesium . . . 0.07
tion under load of 0.330 %, that is, 0.0066 in. [0.165 mm] in a
Manganese . . . 0.25
gage length of 2 in. [50 mm].
Copper . . . 0.1
Nickel . . . 1.0
11.3 Determine the percent of each graphite nodule type by
Chromium . . . 0.07
manual coating, semi-automatic, or automatic image analysis
methods. The manual count method shall prevail when the
TABLE 2 Tensile Properties
results of other methods differ. Magnification shall be at 100 3.
Tensile Strength, Yield Strength, Elongation in 2 in. [50 mm],
11.4 Spectrometric methods may be used for chemical
min, psi [MPa] min, psi [MPa] min, %
analysis. Should a dispute arise concerning chemical compo-
45 000 [300] 30 000 [200] 12 [12]
sition, use Test Methods E 351 and E 30 for referee methods.
7.2 Conditioning of castings is permitted to the extent that
12. Records
the removal of metal does not extend into the envelope of the
12.1 Records of the chemical composition, mechanical
finished container and does not alter the properties of the metal
properties, and the metallographic examination shall be sys-
remaining in the finished container.
tematically made and maintained.
8. Repair
13.
...