ASTM A906/A906M-02(2022)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A906/A906M −02 (Reapproved 2022)
Standard Specification for
Grade 80 and Grade 100 Alloy Steel Chain Slings for
Overhead Lifting
This standard is issued under the fixed designationA906/A906M; 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 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers the requirements and method
A391/A391MSpecification for Grade 80 Alloy Steel Chain
of rating and testing for alloy chain slings. Slings shall be
A952/A952MSpecification for Forged Grade 80 and Grade
assembledusingcomponentsmanufacturedinaccordancewith
100 Steel Lifting Components and Welded Attachment
Specification A391/A391M for Grade 80 chain, Specification
Links
A973/A973M for Grade 100 chain, and Specification A952/
A973/A973MSpecificationforGrade100AlloySteelChain
A952M for other components. This specification covers
2.2 Other Standards:
welded and mechanically assembled slings.
OSHA 1910.184Slings
ASME B30.9Slings
1.2 This specification does not cover slings used at elevated
ASME B30.10Hooks
temperatures (above 400°F [200°C]), in harmful or corrosive
environmental conditions or for applications such as nonsym-
3. Terminology
metrical legs or loading.
3.1 Definitions:
1.3 This specification is a performance and assembly speci-
3.1.1 chain sling—an assembly consisting of alloy steel
fication. Other standards, such as OSHA 1910.184, ASME
chain or chains joined to suitable upper and lower fittings,
B30.9, andASME B30.10, apply to the use of the products in
according to the provisions of this specification, for attaching
this specification.
loads to be lifted by a crane or lifting machine.
3.1.2 coupling link—a link fitted to the end of the chain to
1.4 The values stated in either inch-pound units or SI units
connect to another component of the sling. See Fig. 1.
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each 3.1.3 master coupling link (secondary or intermediate
link)—a link used on three and four leg slings to connect the
system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be legs to a master link. See Fig. 1.
used independently of the other, and values from the two
3.1.4 master link—a link used as the upper end component
systems shall not be combined.
of a chain sling and by means of which the sling is attached to
a crane or other lifting machine. See Fig. 1.
1.5 This international standard was developed in accor-
3.1.5 overhead lifting—that process of lifting which would
dance with internationally recognized principles on standard-
elevateafreelysuspendedloadtosuchapositionthatdropping
ization established in the Decision on Principles for the
theloadwouldpresentapossibilityofbodilyinjuryorproperty
Development of International Standards, Guides and Recom-
damage.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
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
Standards volume information, refer to the standard’s Document Summary page on
This specification is under the jurisdiction ofASTM Committee A01 on Steel, the ASTM website.
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee Available from Occupational Safety and Health Administration (OSHA), 200
A01.27 on Steel Chain. Constitution Ave., NW, Washington, DC 20210, http://www.osha.gov.
Current edition approved March 1, 2022. Published March 2022. Originally Available from American Society of Mechanical Engineers (ASME), ASME
approved in 1991. Last previous edition approved in 2016 as A906/A906M – International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
02(2016). DOI: 10.1520/A0906_A0906M-02R22. www.asme.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A906/A906M − 02 (2022)
FIG. 1 Chain Sling Major Components
3.1.6 proof test—a term designating a quality control test chain used in its manufacture. The grade of a sling is denoted
applied to a sling or to components of a sling. It is the by the lowest grade component used in its manufacture.
minimum force in pounds or newtons which the sling and 4.1.1 Grade 80.
components have withstood under a test in which a constantly 4.1.2 Grade 100.
increasing force has been applied in direct tension.
5. Ordering Information
3.1.7 length (reach)—the distance from the bearing point of
5.1 It shall be the responsibility of the purchaser to specify
the upper end fitting to the bearing point of the lower end
all requirements that are necessary for material ordered under
fitting. See Fig. 1.
this specification. Such requirements to be considered include,
3.1.8 sling angle—that angle measured between the hori-
but are not limited to, the following:
zontal plane and the leg (legs) of the sling. See Tables 1-3.
5.1.1 Conformance to ASTM designation A906 or A906M
3.1.9 working load limit (WLL)—the maximum load which
and year of issue,
a sling is designed to support in direct tension without shock
5.1.2 Size of sling in inches [millimetres],
loading at a designated sling angle of lift.
5.1.3 Grade of sling,
5.1.4 Typeofsling(s)asdesignatedbythesymbolsdepicted
4. Classification
in Table 7, if possible,
4.1 There are two grades of chain slings covered under this
5.1.5 Quantity ordered,
specification. The size of a sling is denoted by the size of the
5.1.6 Reach of sling(s),
5.1.7 Sling angle, and
5.1.8 Certification of proof test(s), if required.
TABLE 1 Chain and Single Leg Grade 80 Sling WLL Data
6. Manufacture
6.1 Assembly:
6.1.1 Only component parts compatible with alloy chain
shall be used.
6.1.2 Slingsassembledbyweldingshallbefabricatedbythe
electric or gas welding process, or both.
6.1.3 Mechanically assembled slings shall be assembled in
accordance with component manufacturer’s recommendations.
Grade 80 Chain Size Single Leg WLL (max)
6.1.4 Components shall be assembled so as to ensure free
in. mm lb kg
articulation of the sling.
⁄32 5.5 2100 950
⁄32 7 3500 1600
7. Mechanical Requirements
⁄16 8 4500 2000
⁄8 10 7100 3200
7.1 Proof Test:
⁄2 13 12 000 5400
7.1.1 All components of a sling, either individually or as an
⁄8 16 18 100 8200
⁄4 20 28 300 12 800 assembly, shall be proof tested as required in 7.1.2 – 7.1.4.
⁄8 22 34 200 15 500
7.1.2 The proof test load for single leg slings and compo-
1 26 47 700 21 600
nents attached to single legs shall be twice the working load
1 ⁄4 32 72 300 32 800
limit for the size and grade chain.
A906/A906M − 02 (2022)
TABLE 2 Double Leg and Single Basket Grade 80 Alloy Chain Sling WLL Data at 60°, 45°, and 30° Sling Angles
NOTE 1—[WLL (double leg)=2xWLL (single leg) x sin α]
WLL at Sling Angle α of
Grade 80 Chain Size
60° 45° 30°
in. mm lbkglbkglbkg
⁄32 5.5 3600 1650 3000 1350 2100 950
⁄32 7 6100 2750 4900 2250 3500 1600
⁄16 8 7800 3550 6400 2900 4500 2000
⁄8 10 12 300 5500 10 000 4500 7100 3200
⁄2 13 20 800 9450 17 000 7700 12 000 5400
⁄8 16 31 300 14 200 25 600 11 600 18 100 8200
⁄4 20 49 000 22 250 40 000 18 150 28 300 12 800
⁄8 22 59 200
...