1、Designation: A 906/A 906M 02Standard Specification forGrade 80 and Grade 100 Alloy Steel Chain Slings forOverhead Lifting1This standard is issued under the fixed designationA 906/A 906M; the number immediately following the designation indicates the yearof original adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers the requirements and methodof rating and testing for alloy chain slings. S
3、lings shall beassembled using components manufactured in accordance withSpecification A 391/A 391M for Grade 80 chain, A 973/A 973M for Grade 100 chain, and A 952/A 952M for othercomponents. This specification covers welded and mechani-cally assembled slings.1.2 This specification does not cover sli
4、ngs used at elevatedtemperatures (above 400F 200C), in harmful or corrosiveenvironmental conditions or for applications such as nonsym-metrical legs or loading.1.3 This specification is a performance and assembly speci-fication. Other standards, such as OSHA 1910.184, AS-ME B30.9, andASME B30.10, ap
5、ply to the use of the productsin this specification.1.4 The values stated in either inch-pound units or SI unitsshall be regarded separately as standard. Within the text, the SIunits are shown in brackets. The values stated in each systemare not exact equivalents; therefore each system shall be used
6、independently of the other, without combining values in anyway.2. Referenced Documents2.1 ASTM Standards:A 391/A 391M Specification for Alloy Steel Chain2A 952/A 952M Specification for Forged Grade 80 andGrade 100 Steel Lifting Components and Welded Attach-ment Links2A 973/A 973M Specification for G
7、rade 100 Alloy SteelChain22.2 Other Standards:OSHA 1910.1843ASME B30.9 Slings4ASME B30.10 Hooks43. Terminology3.1 Definitions:3.1.1 chain slingan assembly consisting of alloy steelchain or chains joined to suitable upper and lower fittings,according to the provisions of this specification, for attac
8、hingloads to be lifted by a crane or lifting machine.3.1.2 coupling linka link fitted to the end of the chain toconnect to another component of the sling. See Fig. 1.3.1.3 master coupling link (secondary or intermediatelink)a link used on three and four leg slings to connect thelegs to a master link
9、. See Fig. 1.3.1.4 master linka link used as the upper end componentof a chain sling and by means of which the sling is attached toa crane or other lifting machine. See Fig. 1.3.1.5 overhead liftingthat process of lifting which wouldelevate a freely suspended load to such a position that droppingthe
10、 load would present a possibility of bodily injury or propertydamage.3.1.6 proof testa term designating a quality control testapplied to a sling or to components of a sling. It is theminimum force in pounds or newtons which the sling andcomponents have withstood under a test in which a constantlyinc
11、reasing force has been applied in direct tension.3.1.7 length (reach)the distance from the bearing point ofthe upper end fitting to the bearing point of the lower endfitting. See Fig. 1.3.1.8 sling anglethat angle measured between the hori-zontal plane and the leg (legs) of the sling. See Tables 1-3
12、.3.1.9 working load limit (WLL)the maximum load whicha sling is designed to support in direct tension without shockloading at a designated sling angle of lift.4. Classification4.1 There are two grades of chain slings covered under thisspecification. The size of a sling is denoted by the size of the1
13、This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.27 on Steel Chain.Current edition approved May 10, 2002. Published June 2002. Originallypublished as A 90691. Last previous edition A 90
14、699.2Annual Book of ASTM Standards, Vol 01.05.3Available from Occupational Safety and HealthAdministration (OSHA), Officeof the Federal Register NationalArchives and RecordsAdministration, Washington,DC.4Available from American Society of Mechanical Engineers (ASME), 3 ParkAve., New York, NY 1001659
15、90.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.chain used in its manufacture. The grade of a sling is denotedby the lowest grade component used in its manufacture.
16、4.1.1 Grade 80.4.1.2 Grade 100.5. Ordering Information5.1 It shall be the responsibility of the purchaser to specifyall requirements that are necessary for material ordered underthis specification. Such requirements to be considered include,but are not limited to, the following:5.1.1 Conformance to
17、ASTM designation A 906 or A 906Mand year of issue,5.1.2 Size of sling in inches millimetres,5.1.3 Grade of sling,5.1.4 Type of sling(s) as designated by the symbols depictedin Table 7, if possible,5.1.5 Quantity ordered,5.1.6 Reach of sling(s),5.1.7 Sling angle, and5.1.8 Certification of proof test(
18、s), if required.6. Manufacture6.1 Assembly:6.1.1 Only component parts compatible with alloy chainshall be used.6.1.2 Slings assembled by welding shall be fabricated by theelectric or gas welding process, or both.6.1.3 Mechanically assembled slings shall be assembled inaccordance with component manuf
19、acturers recommendations.6.1.4 Components shall be assembled so as to ensure freearticulation of the sling.7. Mechanical Requirements7.1 Proof Test:7.1.1 All components of a sling, either individually or as anassembly, shall be proof tested as required in 7.1.2-7.1.4.7.1.2 The proof test load for si
20、ngle leg slings and compo-nents attached to single legs shall be twice the working loadlimit for the size and grade chain.7.1.3 The proof test load for components attached to twolegs of a sling shall be four times the working load limit for thesize and grade chain.7.1.4 The proof test load for compo
21、nents attached to three orfour legs of a sling shall be six times the working load limit forthe size and grade chain.7.1.5 All sling components shall withstand the proof testload without loss of integrity or detrimental dimensionalchanges. Components that do not withstand the proof test shallbe disc
22、arded.8. Tolerances8.1 When constructing the sling, a tolerance of 0 + 2 linksis permissible on the nominal reach ordered by a purchaser. Inthe completed sling, the difference between the longest andshortest legs of a multi-leg sling shall not exceed516 in. (8 mm)for legs up to 612 ft (2 m) in lengt
23、h. For slings in excess of 612FIG. 1 Chain Sling Major ComponentsTABLE 1 Chain and Single Leg Grade 80 Sling WLL DataGrade 80 Chain Size Single Leg WLL (max)in. mm lb kg732 5.5 2100 950932 7 3500 1600516 8 4500 200038 10 7100 320012 13 12 000 540058 16 18 100 820034 20 28 300 12 80078 22 34 200 15 5
24、001 26 47 700 21 600114 32 72 300 32 800A 906/A 906M 022TABLE 2 Double Leg and Single Basket Grade 80 Alloy Chain Sling WLL Data at 60, 45, and 30 Sling AnglesNOTE 1WLL (double leg)=2xWLL(single leg) x sin aGrade 80 Chain SizeWLL at Sling Angle a of60 45 30in. m lbkglbkglbkg732 5.5 3600 1650 3000 13
25、50 2100 950932 7 6100 2750 4900 2250 3500 1600516 8 7800 3550 6400 2900 4500 200038 10 12 300 5500 10 000 4500 7100 320012 13 20 800 9450 17 000 7700 12 000 540058 16 31 300 14 200 25 600 11 600 18 100 820034 20 49 000 22 250 40 000 18 150 28 300 12 80078 22 59 200 26 850 48 400 21 900 34 200 15 500
26、1 26 82 600 37 500 67 400 30 600 47 700 21 600114 32 125 200 56 800 102 200 46 400 72 300 32 800TABLE 3 Triple and Quadruple Leg and Double Basket Grade 80 Alloy Chain Sling WLL Data at 60, 45, and 30 Sling AnglesNOTE 1 WLL (3 or 4 leg)=3xWLL(single leg) x sin aGrade 80 Chain Size WLL at Sling Angle
27、 a of60 45 30in. m lbkglbkglbkg732 5.5 5500 2450 4400 2000 3200 1450932 7 9100 4150 7400 3400 5200 2400516 8 11 700 5350 9500 4350 6800 310038 10 18 400 8300 15 100 6800 10 600 480012 13 31 200 14 150 25 500 11 550 18 000 820058 16 47 000 21 300 38 400 17 400 27 100 12 30034 20 73 500 33 400 60 000
28、27 250 42 400 19 30078 22 88 900 40 250 72 500 32 900 51 300 23 2501 26 123 900 56 250 101 200 45 950 71 500 32 500114 32 187 800 85 200 153 400 69 600 108 400 49 200A 906/A 906M 023ft (2 m), the difference between the longest and shortest legsmay be increased by532 in. (4 mm) for each additional 31
29、4 ft(1 m).9. Working Load Limit (WLL)9.1 Working Load LimitThe working load limits given inTables 1-6 are for symmetrically loaded slings manufacturedwith components of equal or higher working load limits thanthe chain.9.2 Slings containing any Grade 80 component shall berated at Grade 80 working lo
30、ad limits.9.3 Working load limits shall conform to the values shownin Tables 1-3 for Grade 80 slings and Tables 4-6 for Grade 100slings.NOTE 1The working load limit values in Tables 1-6 have beenrounded to the nearest 100 lb 50 kg.NOTE 2Rigging and hitch conditions may lower the working loadlimit of
31、 the sling.9.4 Working load limits for sling angles not listed in Tables1-6 shall be calculated as follows:9.4.1 The working load limit for double leg and singlebasket slings = 2 3 single leg sling working load limit 3 sineof horizontal angle.9.4.2 The working load limit for triple and quadruple leg
32、and double basket slings = 3 3 chain single leg sling workingload limit 3 sine of horizontal angle.9.4.3 Nominal RatingThe nominal rating of any multi-branch sling shall be the working load limit for that sling whenapplied at an angle of 60 from the horizontal.10. Workmanship, Finish, and Appearance
33、10.1 The manufacturer may apply a surface treatment orcoating of his own choice for identification or corrosionresistance unless the customer specifies otherwise.11. Certification11.1 A manufacturers certification of proof test shall befurnished, if requested. The certificate shall include the infor
34、-mation on the tag, the proof load, and date of issue.11.2 For mechanically assembled slings, the appropriatecertification of sling component parts shall be made availableto the user if requested.12. Product Marking12.1 Identification TagThere shall be an identification tagpermanently affixed to eac
35、h sling chain bearing the followinginformation:12.1.1 Size,12.1.2 Length (reach),12.1.3 Working load limit and angle upon which it is based,12.1.4 Serial number,12.1.5 Manufacturers name or symbol, and chain grade,and12.1.6 Sling type (number of legs) as described in Table 7.13. Keywords13.1 chain;
36、steel chainTABLE 4 Chain and Single Leg Grade 100 Sling WLL DataGrade 100 Chain Size Single Leg WLL (max)in. mm lb kg732 5.5 2700 1200932 7 4300 1950516 8 5700 260038 10 8800 400012 13 15 000 680058 16 22 600 10 30034 20 35 300 16 00078 22 42 700 19 400A 906/A 906M 024TABLE 5 Double Leg and Single B
37、asket Grade 100 Alloy Chain Sling WLL Data at 60, 45, and 30 Sling AnglesNOTEWLL (double leg) = 2 3 WLL (single leg) 3 sin a.Grade 100 Chain Size WLL at Sling Angle a of60 45 30in.mlbkglbkglbkg732 5.5 4700 2150 3800 1750 2700 1200932 7 7400 3400 6100 2750 4300 1950516 8 9900 4500 8100 3700 5700 2600
38、38 10 15 200 6950 12 400 5650 8800 400012 13 26 000 11 800 21 200 9600 15 000 680058 16 39 100 17 750 32 000 14 500 22 600 10 30034 20 61 100 27 700 49 900 22 650 35 300 16 00078 22 74 000 33 500 60 400 27 350 42 700 19 400TABLE 6 Triple and Quadruple Leg and Double Basket Grade 100 Alloy Chain Slin
39、g WLL Data at 60, 45, and 30 Sling AnglesNOTEWLL (3 or 4 leg) = 3 3 WLL (single leg) 3 sin a.Grade 100 Chain Size WLL at Sling Angle a of60 45 30in.mlbkglbkglbkg732 5.5 7000 3250 5700 2650 4000 1900932 7 11 200 5050 9100 4150 6400 2950516 8 14 800 6750 12 100 5500 8500 390038 10 22 900 10 400 18 700
40、 8500 13 200 600012 13 39 000 17 650 31 800 14 450 22 500 10 20058 16 58 700 26 650 47 900 21 750 33 900 15 40034 20 91 700 41 550 74 900 33 950 53 000 24 00078 22 110 900 50 250 90 600 41 050 64 000 29 050A 906/A 906M 025SUMMARY OF CHANGES(1) Revised 1.1.(2) Global throughout standard: changed “fit
41、ting” to “compo-nent,” “fittings” to “components” and “reach” to “length.”(3) Revised definition 3.1.2 for “coupling link,” deleted defi-nitions for “end fitting” and “qualified person,” and renameddefintion 3.1.5 “reach” to “length (reach).”(4) Added Note 2 under 9.3.(5) Revised standard to include
42、 single and double basket slings(Revised 1, Tables 2, 3, 5, 6, and 7).(6) Removed prior Note on 30 sling angle in Tables 2, 3, 5,and 6.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stand
43、ard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andi
44、f not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, wh
45、ich you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
46、United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 7 Sling DesignationNOTE 1This table is n
47、ot complete in that manufacturers employspecial designations for special, miscellaneous, and adjustable sling styles.First Symbol (Basic Sling Type) Second Symbol (Upper End Fit-ting)ASymbol Description Symbol DescriptionS Single Leg O Oblong Master LinkC Single Choker with MasterLinks no hooksP Pea
48、r Shaped Master LinkD Double Leg S Sling HookT Triple Leg G Grab HookQ Quadruple Leg F Foundry HookSB Single BasketDB Double BasketThird Symbol (End (Terminal) Fitting(s)Symbol DescriptionS Sling HookG Grab HookF Foundry HookAThe absence of a designation in the second symbol position indicates no topfitting present. Such would be the case in a single leg with grab hook at one enddesignated SG.A 906/A 906M 026
