ASTM A906/A906M-02(2010)
(Specification)Standard Specification for Grade 80 and Grade 100 Alloy Steel Chain Slings for Overhead Lifting
Standard Specification for Grade 80 and Grade 100 Alloy Steel Chain Slings for Overhead Lifting
ABSTRACT
This specification covers requirements and method of rating and testing for alloy chain slings. Only component parts compatible with alloy chain shall be used. Sling assembled by welding shall be fabricated by the electric or gas welding process, or both. The material shall undergo proof test to meet the prescribed mechanical requirements. Several grades of alloy chain sling shall conform to the specified working load limit values.
SCOPE
1.1 This specification covers the requirements and method of rating and testing for alloy chain slings. Slings shall be assembled using components manufactured in accordance with Specification A391/A391M for Grade 80 chain, A973/A973M for Grade 100 chain, and A952/A952M for other components. This specification covers welded and mechanically assembled slings.
1.2 This specification does not cover slings used at elevated temperatures (above 400°F [200°C]), in harmful or corrosive environmental conditions or for applications such as nonsymmetrical legs or loading.
1.3 This specification is a performance and assembly specification. Other standards, such as OSHA 1910.184, ASME B30.9, and ASME B30.10, apply to the use of the products in this specification.
1.4 The values stated in either inch-pound units or SI units shall be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore each system shall be used independently of the other, without combining values in any way.
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Designation:A906/A906M −02(Reapproved 2010)
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 2.2 Other Standards:
OSHA 1910.184
1.1 This specification covers the requirements and method
ASME B30.9Slings
of rating and testing for alloy chain slings. Slings shall be
ASME B30.10Hooks
assembledusingcomponentsmanufacturedinaccordancewith
Specification A391/A391M for Grade 80 chain, A973/A973M
3. Terminology
for Grade 100 chain, and A952/A952M for other components.
3.1 Definitions:
This specification covers welded and mechanically assembled
slings. 3.1.1 chain sling—an assembly consisting of alloy steel
chain or chains joined to suitable upper and lower fittings,
1.2 This specification does not cover slings used at elevated
according to the provisions of this specification, for attaching
temperatures (above 400°F [200°C]), in harmful or corrosive
loads to be lifted by a crane or lifting machine.
environmental conditions or for applications such as nonsym-
metrical legs or loading. 3.1.2 coupling link—a link fitted to the end of the chain to
connect to another component of the sling. See Fig. 1.
1.3 This specification is a performance and assembly speci-
3.1.3 master coupling link (secondary or intermediate
fication. Other standards, such as OSHA 1910.184, ASME
link)—a link used on three and four leg slings to connect the
B30.9, andASME B30.10, apply to the use of the products in
legs to a master link. See Fig. 1.
this specification.
3.1.4 master link—a link used as the upper end component
1.4 The values stated in either inch-pound units or SI units
of a chain sling and by means of which the sling is attached to
shallberegardedseparatelyasstandard.Withinthetext,theSI
a crane or other lifting machine. See Fig. 1.
units are shown in brackets. The values stated in each system
are not exact equivalents; therefore each system shall be used
3.1.5 overhead lifting—that process of lifting which would
independently of the other, without combining values in any
elevateafreelysuspendedloadtosuchapositionthatdropping
way.
theloadwouldpresentapossibilityofbodilyinjuryorproperty
damage.
2. Referenced Documents
3.1.6 proof test—a term designating a quality control test
2.1 ASTM Standards:
applied to a sling or to components of a sling. It is the
A391/A391MSpecification for Grade 80 Alloy Steel Chain
minimum force in pounds or newtons which the sling and
A952/A952MSpecification for Forged Grade 80 and Grade
components have withstood under a test in which a constantly
100 Steel Lifting Components and Welded Attachment
increasing force has been applied in direct tension.
Links
3.1.7 length (reach)—the distance from the bearing point of
A973/A973MSpecificationforGrade100AlloySteelChain
the upper end fitting to the bearing point of the lower end
fitting. See Fig. 1.
3.1.8 sling angle—that angle measured between the hori-
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
zontal plane and the leg (legs) of the sling. See Tables 1-3.
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.27 on Steel Chain.
Current edition approved April 1, 2010. Published May 2010. Originally
approved in 1991. Last previous edition approved in 2002 as A906/A906M – 02.
DOI: 10.1520/A0906_A0906M-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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A906/A906M−02 (2010)
FIG. 1Chain Sling Major Components
TABLE 1 Chain and Single Leg Grade 80 Sling WLL Data
5.1.1 Conformance to ASTM designation A906 or A906M
and year of issue,
5.1.2 Size of sling in inches [millimetres],
5.1.3 Grade of sling,
5.1.4 Typeofsling(s)asdesignatedbythesymbolsdepicted
in Table 7, if possible,
5.1.5 Quantity ordered,
5.1.6 Reach of sling(s),
5.1.7 Sling angle, and
5.1.8 Certification of proof test(s), if required.
Grade 80 Chain Size Single Leg WLL (max)
in. mm lb kg
6. Manufacture
⁄32 5.5 2100 950
⁄32 7 3500 1600
6.1 Assembly:
⁄16 8 4500 2000
6.1.1 Only component parts compatible with alloy chain
⁄8 10 7100 3200
1 shall be used.
⁄2 13 12 000 5400
⁄8 16 18 100 8200 6.1.2 Slingsassembledbyweldingshallbefabricatedbythe
⁄4 20 28 300 12 800
electric or gas welding process, or both.
⁄8 22 34 200 15 500
6.1.3 Mechanically assembled slings shall be assembled in
1 26 47 700 21 600
1 ⁄4 32 72 300 32 800
accordance with component manufacturer’s recommendations.
6.1.4 Components shall be assembled so as to ensure free
articulation of the sling.
3.1.9 working load limit (WLL)—the maximum load which
7. Mechanical Requirements
a sling is designed to support in direct tension without shock
7.1 Proof Test:
loading at a designated sling angle of lift.
7.1.1 All components of a sling, either individually or as an
assembly, shall be proof tested as required in 7.1.2 – 7.1.4.
4. Classification
7.1.2 The proof test load for single leg slings and compo-
4.1 There are two grades of chain slings covered under this
nents attached to single legs shall be twice the working load
specification. The size of a sling is denoted by the size of the
limit for the size and grade chain.
chain used in its manufacture. The grade of a sling is denoted
7.1.3 The proof test load for components attached to two
by the lowest grade component used in its manufacture.
legsofaslingshallbefourtimestheworkingloadlimitforthe
4.1.1 Grade 80.
size and grade chain.
4.1.2 Grade 100.
7.1.4 Theprooftestloadforcomponentsattachedtothreeor
fourlegsofaslingshallbesixtimestheworkingloadlimitfor
5. Ordering Information
the size and grade chain.
5.1 It shall be the responsibility of the purchaser to specify 7.1.5 All sling components shall withstand the proof test
all requirements that are necessary for material ordered under load without loss of integrity or detrimental dimensional
this specification. Such requirements to be considered include, changes. Components that do not withstand the proof test shall
but are not limited to, the following: be discarded.
A906/A906M−02 (2010)
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 30
...
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