ASTM A952/A952M-02(2010)

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Designation:A952/A952M −02(Reapproved 2010)
Standard Specification for
Forged Grade 80 and Grade 100 Steel Lifting Components
and Welded Attachment Links
This standard is issued under the fixed designationA952/A952M; 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.
1. Scope E44 Definitions for Terms Relating to Heat Treatment of
Metals (Withdrawn 1993)
1.1 This specification covers the requirements for forged
E165 Practice for Liquid Penetrant Examination for General
alloy steel lifting components and welded coupling and master
Industry
links for Grade 80 and Grade 100 alloy chain slings as
E709 Guide for Magnetic Particle Testing
described in Specification A906/A906M.
2.2 Other Standards:
1.2 Two grades of components and welded links are cov-
OSHA 1910.184 Slings
ered: 5
ASME B30.9 Slings
1.2.1 Grade 80.
ASME B30.10 Hooks
1.2.2 Grade 100.
3. Terminology
1.3 This specification is a performance standard. Other
standards apply to use of these products. Some of these
3.1 Definitions of Terms Specific to This Standard:
standards are: OSHA 1910.184, ASME B30.9, and ASME
3.1.1 breaking force, minimum—the minimum force in
B30.10.
pounds or newtons at which the component has been found by
verification testing to break when a constantly increasing force
1.4 The values stated in either inch-pound or SI units are to
was applied in direct tension. This test is a manufacturer’s
be regarded separately as standard.Within the text, the SI units
design verification test and shall not be used as criteria for
are shown in brackets.The values stated in each system are not
service.
exact equivalents; therefore, each system shall be used inde-
pendentlyoftheother.Combiningvaluesfromthetwosystems
3.1.2 chain sling—an assembly consisting of alloy steel
may result in nonconformance with the specification.
chain joined to upper and lower end components for attaching
loads to be lifted by a crane or lifting machine.
2. Referenced Documents
3.1.3 coupling link—a link fitted to the end of the chain to
2.1 ASTM Standards: connect to another component of the sling. See Fig. 1.
A29/A29M SpecificationforGeneralRequirementsforSteel
3.1.4 masterlink—alinkusedasanupperendcomponentof
Bars, Carbon and Alloy, Hot-Wrought
a chain sling and by means of which the sling may be attached
A391/A391M Specification for Grade 80 Alloy Steel Chain
to a crane or other device. See Fig. 1.
A751 Test Methods, Practices, and Terminology for Chemi-
3.1.5 master coupling link (secondary or intermediate
cal Analysis of Steel Products
link)—a link used on three and four leg slings to connect the
A906/A906M Specification for Grade 80 and Grade 100
legs to a master link. See Fig. 1.
Alloy Steel Chain Slings for Overhead Lifting
3.1.6 proof test—a quality control tensile test applied to
A973/A973M Specification for Grade 100Alloy Steel Chain
components for the purpose of verifying manufacturing and
E4 Practices for Force Verification of Testing Machines
material quality. It is the minimum force in pounds or newtons
which the component has withstood at the time it left the
producer, under a test in which a constantly increasing force
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.27 on Steel Chain.
Current edition approved April 1, 2010. Published May 2010. Originally The last approved version of this historical standard is referenced on
approved in 1996. Last previous edition approved in 2002 as A952/A952M – 02. www.astm.org.
DOI: 10.1520/A0952_A0952M-02R10. Available from Occupational Safety and Health Administration (OSHA), 200
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Constitution Ave., NW, Washington, DC 20210, http://www.osha.gov.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from American Society of Mechanical Engineers (ASME), ASME
Standards volume information, refer to the standard’s Document Summary page on International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
the ASTM website. www.asme.org.
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A952/A952M−02 (2010)
FIG. 1 General Component Configuration
A952/A952M−02 (2010)
FIG. 1 General Component Configuration (continued)
A952/A952M−02 (2010)
has been applied in direct tension. Proof test loads are a 6. Materials
manufacturingintegritytestandshallnotbeusedascriteriafor
6.1 Quality—The selection of the type of steel is left to the
service.
judgment of the manufacturer provided the material meets the
3.1.7 traceability code—a series of letters, or numbers, or requirements set forth in 6.2 and 6.3.
both, marked on a component which enables its manufacturing
6.2 Melting Process—The steel used shall be produced by
history, including identity of the steel heat, to be traced.
an electric process or by an oxygen blown process. The steel
3.1.8 working load limit (WLL)—the maximum combined shall be fully killed and have an austenitic grain size of 5 or
static and dynamic load in pounds or kilograms that shall be finer.
applied in direct tension to the component.
6.3 Chemical Requirements:
6.3.1 The alloy steel used shall contain at least two of the
4. Classification
three alloying agents in the minimum percentages as listed
below:
4.1 Only Grade 80 and Grade 100 components are covered
under this specification. Nickel 0.40 % minimum
Chromium 0.40 % minimum
4.2 Sixteen classes of components are covered under this Molybdenum 0.15 % minimum
specification. The general configuration on these components
6.3.2 The phosphorous and sulfur content of the steel shall
are shown in Fig. 1.
not exceed 0.025 % for each element.
4.2.1 Class EGH—Eye Grab Hook.
6.3.3 Product Analysis—The steel used may be analyzed by
4.2.2 Class CGH—Clevis Grab Hook. the purchaser and shall conform to the requirements of 6.3.1
4.2.3 Class ESH—Eye Sling Hook. and 6.3.2 subject to the product analysis tolerances specified in
Specification A29/A29M. Test samples may be taken from
4.2.4 Class CSH—Clevis Sling Hook.
rods, bars, or finished product.
4.2.5 Class EFH—Eye Foundry Hook.
6.3.4 Chemical analysis of material covered by this speci-
4.2.6 Class CFH—Clevis Foundry Hook.
fication for referee purposes shall be in accordance with Test
4.2.7 Class CLM—Coupling Link, Mechanical.
Methods, Practices, and Terminology A751.
4.2.8 Class ESLH—Eye Self-Locking Hook.
4.2.9 Class CSLH—Clevis Self-Locking Hook.
7. Manufacture
4.2.10 Class ECGH—Eye Claw Grab Hook.
7.1 The body of all components shall be forged hot in one
4.2.11 Class CCGH—Clevis Claw Grab Hook.
piece, with the exception of Class ML, MCL and CL link
4.2.12 Class ML—Master Link.
components.
4.2.13 Class MCL—Master Coupling Link.
7.2 Excess metal flash shall be cleanly removed, leaving the
4.2.14 Class CL—Coupling Link.
surface free from sharp edges.
4.2.15 Class CCL—Clevis Coupling Link.
7.3 Class ML, MCL, and CL link components may be
4.2.16 Class OTH—Specialty components may be required
manufactured using the electric welding, gas welding, or
for certain applications.
forging process.
4.3 For the classes listed in 4.2, an “S” prefix denotes a
7.4 Ancillary components such as load pins, latches,
component with a swivel joint.
bearings, and springs need not be forged components.
7.5 Welding shall not be used to repair forged components.
5. Ordering Information
Grindingofsurfacediscontinuitiesmaybecarefullyperformed
5.1 It shall be the responsibility of the purchaser to specify
aslongasnodimensionisalteredoutsideofthemanufacturer’s
all requirements that are necessary for material ordered under
dimensions and tolerances for that component. All ground
this specification. Such requirements to be considered include,
areas must blend in smoothly with the surface.
but are not limited to, the following:
7.6 Heat Treatment—After forging or welding is completed,
5.1.1 Product to conform to Specification A952 or Specifi-
each load bearing component shall be heat treated before
cation A952M and year of issue.
applying the proof test. Heat treatment shall include quenching
5.1.2 Nominal size of component, in. [mm] (see Note 1).
and tempering as defined in Definitions E44.
5.1.3 Grade of component.
7.7 After heat treatment, furnace scale shall be removed
5.1.4 Class of component.
from the component.
5.1.5 Quantity of components.
5.1.6 Finish, if required.
8. Performance Requirements
5.1.7 Certification, if required.
8.1 Proof Test—All components shall be proof tested as
5.1.8 Acceptance of inspection by purchaser, if required.
requiredper8.1.1through8.1.5.Alltestsshallbeperformedon
5.1.9 Supplementary requirements, if required.
equipment certifiable to Practices E4.
8.1.1 All components used on single legs of slings shall be
NOTE 1—Component size and working load limits are based on Grade
tested to at least the proof test load prescribed in Table 1 for
80 and Grade 100 alloy steel chain nominal sizes. See Specification
A391/A391M and A973/A973M. Grade 80 components and Table 2 for Grade 100 components.
A952/A952M−02 (2010)
TABLE 1 Mechanical Requirements for Grade 80 Single Leg
8.3 Design Verification Tests:
Components
8.3.1 Deformation Test—Three samples shall be tested and
A
Nominal Size Working Load Proof Test , min Minimum
eachshallwithstandtheprooftestloadasprescribedin8.1.No
A
Limit, max Breaking Force
dimensionshallbealteredaftertheprooftestbymorethan1 %
in. mm lb kg lb kN lb kN
of the initial dimension. Class ML, MCL, and CL components
⁄32 5.5 2100 970 4200 19.0 8400 38.0
are exempt from the deformation requirement test.
⁄32 7.0 3500 1570 7000 30.8 14 000 61.6
⁄16 8.0 4500 2000 9000 40.3 18 000 80.6 8.3.2 Breaking Force Test:
⁄8 10.0 7100 3200 14 200 63.0 28 400 126.0
8.3.2.1 For single leg components, three samples shall be
⁄2 13.0 12 000 5400 24 000 107.0 48 000 214.0
5 tested and be capable of withstanding the relevant minimum
⁄
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