ASTM A126-04(2014)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:A126 −04 (Reapproved 2014)
Standard Specification for
Gray Iron Castings for Valves, Flanges, and Pipe Fittings
This standard is issued under the fixed designation A126; 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 U.S. Department of Defense.
1. Scope 5.1.2 Class of iron required,
5.1.3 Quantity, and
1.1 This specification covers three classes of gray iron for
5.1.4 Certification, if required (see Section 17).
castings intended for use as valve pressure retaining parts, pipe
fittings, and flanges.
6. Workmanship, Finish, and Appearance
1.2 The values stated in inch-pound units are to be regarded
6.1 The castings shall be made in a workmanlike manner
as standard. The values given in parentheses are mathematical
and the surface shall be free of adhering sand, scale, cracks,
conversions to SI units that are provided for information only
and hot tears as determined by visual examination.
and are not considered standard.
7. Chemical Requirements
NOTE 1—The text of this standard references notes and footnotes which
provide explanatory material. These notes and footnotes (excluding those
7.1 A chemical analysis shall be performed on each lot and
in tables and figures) shall not be considered as requirements of the
shall conform to the following requirements for phosphorus
standard.
and sulfur:
2. Referenced Documents Phosphorus, max, % 0.75
Sulfur, max, % 0.15
2.1 ASTM Standards:
7.2 The chemical analysis shall be performed on a sample
A48/A48M Specification for Gray Iron Castings
obtained during the pouring of the lot.
A644 Terminology Relating to Iron Castings
E8 Test Methods for Tension Testing of Metallic Materials
8. Tensile Properties
8.1 Onetensiontestshallbeperformedoneachlotandshall
3. Terminology
conform to the mechanical properties specified in
3.1 Definitions of many terms common to gray iron castings
Table 1.
are found in Terminology A644.
9. Cast Test Bars
4. Classification
9.1 Separately cast 1 ⁄8 in. (28.6 mm) diameter test bars
4.1 Castings produced to this specification are classified
shown in Fig. 1 shall be poured in sand molds from the same
based upon the minimum tensile strength of the iron (see Table
lot as the castings represented.
1).
NOTE 2—The numbering on the test specimens shown in Fig. 1 and Fig.
2 is intended simply to illustrate a method of designation. In the particular
5. Ordering Information
method shown refers to December 8, B1 is the cupola number, and the
5.1 Orders for material in this specification should include
numeral 1 which follows shows the hour cast (1 p.m.).
the following information:
9.2 Test bars that are intended to represent castings which
5.1.1 ASTM designation and year date,
are cooled in the mold to less than 900°F (480°C) before
shakeout, shall be cooled in their molds to a temperature less
than 900°F, and then may be cooled in still air to room
This specification is under the jurisdiction of ASTM Committee A04 on Iron
temperature.
CastingsandisthedirectresponsibilityofSubcommitteeA04.01onGreyandWhite
Iron Castings.
9.3 Test bars that are intended to represent castings which
Current edition approved April 1, 2014. Published April 2014. Originally
are hotter than 900°F when shaken out of their molds, shall be
approved in 1929. Last previous edition approved in 2009 as A126 – 04 (2009).
DOI: 10.1520/A0126-04R14.
cooled as described in 9.2 or (by agreement between the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
manufacturer and the purchaser) may be shaken out of their
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
molds at approximately the same temperature as the castings
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. they represent.
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A126−04 (2014)
Metric Equivalents
1 1 1 3 7 1 9 1 3 3
in. ⁄8 ⁄4 ⁄2 ⁄4 ⁄8 1 ⁄8 1.2 1 ⁄32 1 ⁄2 1 ⁄4 2 ⁄4 13
mm 3.2 6.4 12.7 19.0 22.2 28.6 30.5 32.5 38.1 44.4 69.8 1330
NOTE 1—These dimensions are suggested as satisfactory for average conditions, but may be varied to best suit individual pouring.
FIG. 1Mold of Tension and Transverse Test Specimens
Metric Equivalents
in. mm in. mm
1 3
1 ⁄8 28.6 3 ⁄4 95.2
3 5
1 ⁄4 44.4 5 ⁄8 142.9
7 1
1 ⁄8 47.6 7 ⁄2 290.5
NOTE 1—Modification may be made to the grip-ends of the tension test specimen to allow alternative means of gripping as required by testing
procedures and equipment. Should alternative grip-ends be disputed, the threaded grip-ends shall be used.
FIG. 2Tension Test Specimen
TABLE 1 Tensile Requiremen
...