ASTM A536-84(2009)
(Specification)Standard Specification for Ductile Iron Castings
Standard Specification for Ductile Iron Castings
ABSTRACT
This specification covers ductile iron castings, also known as spheroidal or nodular iron, that is described as cast iron with the graphite substantially spheroidal in shape and essentially free of other forms of graphite. Appropriate heat treatment shall be identified according to grades, as follows: a full ferritizing anneal for 60-40-18; a quench and temper, or normalize and temper, or isothermal heat treatment for 100-70-03 and 120-90-02; and as-cast for 65-45-12 and 80-55-06. Castings shall be tested and conform to specified tensile requirements such as tensile strength, yield strength, and elongation. When indicated in the contract or purchase order, castings shall also adhere to special requirements like hardness, chemical composition, microstructure, pressure tightness, radiographic soundness, magnetic particle inspection dimensions, and surface finish.
SCOPE
1.1 This specification covers castings made of ductile iron, also known as spheroidal or nodular iron, that is described as cast iron with the graphite substantially spheroidal in shape and essentially free of other forms of graphite, as defined in Terminology A 644.
1.2 No precise quantitative relationship can be stated between the properties of the iron in various locations of the same casting or between the properties of castings and those of a test specimen cast from the same iron (see Appendix X1).
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A536 −84(Reapproved 2009)
Standard Specification for
Ductile Iron Castings
This standard is issued under the fixed designation A536; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.1 ASTM designation,
3.1.2 Grade of ductile iron required (see Table 1, and
1.1 This specification covers castings made of ductile iron,
Sections 4 and 9),
also known as spheroidal or nodular iron, that is described as
3.1.3 Special properties, if required (see Section 7),
castironwiththegraphitesubstantiallyspheroidalinshapeand
3.1.4 If a different number of samples are required (see
essentially free of other forms of graphite, as defined in
Section 10),
Terminology A644.
3.1.5 Certification, if required (see Section 14), and
1.2 No precise quantitative relationship can be stated be-
3.1.6 Special preparation for delivery, if required (see Sec-
tweenthepropertiesoftheironinvariouslocationsofthesame
tion 15).
castingorbetweenthepropertiesofcastingsandthoseofatest
specimen cast from the same iron (see Appendix X1).
4. Tensile Requirements
1.3 Thevaluesstatedininch-poundunitsaretoberegarded
4.1 The iron represented by the test specimens shall con-
as standard. The values given in parentheses are mathematical
form to the requirements as to tensile properties presented in
conversions to SI units that are provided for information only
Tables 1 and 2. The irons listed in Table 1 cover those in
and are not considered standard.
general use, while those listed in Table 2 are used for special
applications (such as pipes, fittings, etc.).
2. Referenced Documents
4.2 Theyieldstrengthshallbedeterminedat0.2%offsetby
2.1 ASTM Standards:
the offset method (see Test Methods E8). Other methods may
A370Test Methods and Definitions for Mechanical Testing
be used by mutual consent of the manufacturer and purchaser.
of Steel Products
A644Terminology Relating to Iron Castings
5. Heat Treatment
A732/A732MSpecification for Castings, Investment, Car-
5.1 The 60-40-18 grade will normally require a full ferritiz-
bon and Low Alloy Steel for General Application, and
ing anneal.The 120-90-02 and the 100-70-03 grades generally
Cobalt Alloy for High Strength at Elevated Temperatures
require a quench and temper or a normalize and temper, or an
E8Test Methods for Tension Testing of Metallic Materials
isothermal heat treatment. The other two grades can be met
2.2 Military Standard:
either as-cast or by heat treatment. Ductile iron, which is heat
MIL-STD-129Marking for Shipment and Storage
treated by quenching to martensite and tempering, may have
substantially lower fatigue strength than as-cast material of the
3. Ordering Information
same hardness.
3.1 Ordersformaterialtothisspecificationshallincludethe
following information:
6. Test Coupons
6.1 The separately cast test coupons from which the tension
test specimens are machined shall be cast to the size and shape
This specification is under the jurisdiction of the ASTM Committee A04 on
shown in Fig. 1 or Fig. 2.Amodified keel block cast from the
IronCastingsandisthedirectresponsibilityofSubcommitteeA04.02onMalleable
and Ductile Iron Castings.
mold shown in Fig. 3 may be substituted for the 1-in. Y-block
Current edition approved May 1, 2009. Published August 2009. Originally
or the 1-in. keel block. The test coupons shall be cast in open
ε1
approved in 1965. Last previous edition approved in 2004 as A536–84 (2004) .
molds made of suitable core sand having a minimum wall
DOI: 10.1520/A0536-84R09.
1 1
thickness of 1 ⁄2 in. (38 mm) for the ⁄2-in. (12.5 mm) and 1-in.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
(25-mm) sizes and 3 in. (75 mm) for the 3-in. size. The
Standards volume information, refer to the standard’s Document Summary page on
coupons shall be left in the mold until they have cooled to a
the ASTM website.
blackcolor(approximately900°F(482°C)orless).Thesizeof
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 couponcasttorepresentthecastingshallbeattheoptionofthe
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A536−84 (2009)
TABLE 1 Tensile Requirements
Grade Grade Grade Grade Grade
60-40-18 65-45-12 80-55-06 100-70-03 120-90-02
Tensile strength, min, psi 60 000 65 000 80 000 100 000 120 000
Tensile strength, min, MPa 414 448 552 689 827
Yield strength, min, psi 40 000 45 000 55 000 70 000 90 000
Yield strength, min, MPa 276 310 379 483 621
Elongation in 2 in. or 50 mm, min, % 18 12 6.0 3.0 2.0
TABLE 2 Tensile Requirements for Special Applications
Grade Grade Grade
60-42-10 70-50-05 80-60-03
Tensile strength, min, psi 60 000 70 000 80 000
Tensile strength, min, MPa 415 485 555
Yield strength, min, psi 42 000 50 000 60 000
Yield strength, min, MPa 290 345 415
Elongation in 2 in. or 50 mm, 10 5 3
min, %
“Y” Block Size
For Castings
For Castings For Castings
of Thickness
of Thickness of Thickness
Dimen- ⁄2 in.
Less Than of 1 ⁄2 in.
sions (13 mm) to
⁄2 in. (38 mm)
1 ⁄2 in.
(13 mm) and Over
(38 mm)
in. mm in. mm in. mm
A ⁄2 13 1 25 3 75
5 1
B1 ⁄8 40 2 ⁄8 54 5 125
C 2 50 3 75 4 100
D 4 100 6 150 8 200
E 7 175 7 175 7 175
approx approx approx approx approx approx
FIG. 2 Y-Blocks for Test Coupons
cooling rate equivalent to that obtained with the test molds
Metric Equivalents
shown in Figs. 1 and 2, Figs. 4-6,or Appendix X2. The size
in. mm in. mm
(cooling rate) of the coupon chosen to represent the casting
1 1
⁄2 12.7 1 ⁄2 38.1
should be decided by the purchaser. If test coupon size is not
1 25.4 2 ⁄2 63.5
specified, the manufacturer shall make the choice. When test
NOTE 1—The length of the keel block shall be 6 in. (152 mm).
bars will be cut from castings, test bar location shall be agreed
FIG. 1Keel Block for Test Coupons
on by the purchaser and manufacturer and indicated on the
casting drawing. The manufacturer shall maintain sufficient
controlsandcontroldocumentationtoassurethepurchaserthat
purchaser. In case no option is expressed, the manufacturer
properties determined from test coupons or test bars are
shall make the choice.
representative of castings shipped.
6.2 Wheninvestmentcastingsaremadetothisspecification,
6.4 The test coupons shall be poured from the same ladle or
the manufacturer may use test specimens cast to size incorpo-
heat as the castings they represent.
rated in the mold with the castings, or separately cast to size
6.5 Test coupons shall be subjected to the same thermal
using the same type of mold and the same thermal conditions
treatment as the castings they represent.
that are used to produce the castings. These test specimens
shall be made to the dimensions shown in Fig. 1 of Specifica-
7. Special Requirements
tion A732/A732M or Figs. 5 and 6 of Test Methods and
7.1 When specified in the contract or purchase order,
Definitions A370.
castingsshallmeetspecialrequirementsastohardness,chemi-
6.3 The manufacturer may use separately cast test coupons
cal composition, microstructure, pressure tightness, radio-
or test specimens cut from castings when castings made to this
graphic soundness, magnetic particle inspection dimensions,
specifi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.