Chain Slings Alloy

Chain Slings Alloy

Chain Slings
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  • all-Aloy chain slings (a Western Sling Company Brand) exceed industry standards for Grade 100 chain slings.
  • Can be used for all types of chain applications.
  • Chain sling's high-visibility green finish enhances workplace safety.
  • Standard lengths available from 5' - 20', custom lengths available upon request.
  • Made in the U.S.A.
  • Ships in 4-7 business days.
  • Covered by standard manufacturer's warranty.

Operating Practices for Alloy Chain Slings


  • Can Fail if Damaged, Misused or Overloaded.
  • Inspect Before Use.
  • Use Only if Trained.
  • Observe Rated Load.
  • Pad Edges of Load to Avoid Damage to Sling.
  • Death or Injury can Occur from Improper Use or Care.

Instructions for Care, Use, Inspection and Repair of Alloy Chain Slings


  • Store on a rack away from possible mechanical damage, corrosion, dust, grit, extreme temperatures, sun and any ultraviolet light source.
  • Do not anneal (temper) alloy chain, connecting links or hooks. Hot galvanizing requires chain manufacturer’s advice.


  • Check weight of load.
  • Check tag to confirm that sling is rated adequately for the load (see load angle chart).
  • Sling shall not be twisted, tied into knots or joined by knotting.
  • Be sure the load cannot cut the sling during the lift by padding corners, edges, protrusions, or abrasive surfaces; use materials of sufficient strength and thickness.
  • Center load on base (bowl) of hook unless sling hook is designed for point loading.
  • Balance the load.
  • Maintain load control.
  • Avoid jerking the load.
  • Be alert for snagging of load.
  • Avoid dragging sling over rough surfaces and from under the load.
  • Choker hitch must choke on sling body, never on end fitting.
  • Always stand clear of load.
  • Persons are not to ride on sling or load.
  • If sling is to be used in a chemical environment or in temperatures below -40° f or above 400°F. Contact manufacturer for specific recommendations.
  • When shortening chain, use only the manufacturer’s recommended alloy components.
  • Before each use, check for nicks, gouges or excessive wear.
  • Inspect for bent, twisted, deformed chain or components.
  • Inspect for heat damage, weld spatter, pitting or corrosion, increase in hook throat opening, missing latch (if so equipped).
  • If this wear or damage is present, if rated load tag is missing or illegible, remove from service and repair or replace sling.
  • Periodic inspections are required at least annually for normal service, quarterly or more frequently if in severe service or nearly constant use.
  • Periodic inspections are performed only by chain manufacturer or other designated person who records the observed condition and determines when further use would be hazardous.


  • Any hazardous condition disclosed by an inspection shall require repair by chain manufacturer or other qualified person.

Load Angle for Slings

  • Angle factor must be applied to calculate the reduced sling capacity when lifting force is not at 90º to the plane of the load.
  • Multiply angle factor x sling's vertical rated load to calculate the reduced capacity at that angle.
  • Because of the greatly reduced lifting capacity, use extra care when the sling to load angle, also known as the horizontal angle, is less than 45° and do not make lifts of less than 30°load angle.
  • Example: a sling with adequate capacity could be broken because of increased tension resulting from angles of less than 30°.

Sling Load Angle Chart
Angle Factor
90º 1
80º .9848
75º .9659
70º .9397
65º .9063
60º .866
55º .8192
50º .766
45º .7071
40º .6248
35º .5736
30º .5
  • Exceeds industry standards for Grade 100 chain slings.
  • Can be used for all types of chain applications.
  • Sling's high-visibility green finish enhances workplace safety.
  • Standard lengths available from 5' - 20', custom lengths available upon request.
  • Made in the U.S.A. Ships in 4-7 business days. Covered by standard manufacturer's warranty.

Choke Angle Effect for Slings

Sling Choke Angle Effect Chart
Angle of Choke Rated Capacity*
Over 120º 100%
90º-120º 87%
60º-89º 74%
30º-59º 62%
0º-29º 49%
*Percent of Sling Rated Capacity in a Choker Hitch

D-d Ratio for Slings

  • Rated capacity of the sling shall be decreased when D:d Ration will be smaller than that cited in the latest revision of ASME B30.9 Ch2.
  • Consult the sling manufacturer for specific data or refer to the WRTB Wire Rope Sling User's Manual.
  • General Note: When the (D) is 25 times the component rope diameter (d), the D:d Ration is expressed as 25:1.

Alloy Chain Properties

  • Federal regulations require the use of Alloy Chain for lifting and hoisting applications.
  • We offer a full line of Grade 100 and limited items in Grade 80 chain which is produced from heat treatable alloy steel in conformance with ASTM specifications.
  • Its typical mechanical properties provide for a tensile strength of 125,000 psi minimum and a minimum elongation of 20%.
  • Strength and hardness of the alloy chain material are important factors but are not the only criteria for selection.
  • Acceptable alloy chain material also must have toughness, must be resistant to shock loading, and must possess sufficient ductility to provide ample visual evidence of damage caused by excessive over loading.
  • Your state may or may not have specific regulations limiting the use of certain grades of chain.
  • Contact your D.O.T. or State Towing Regulations Board.

Removal Criteria for Alloy Chain Slings

  • An alloy steel chain sling shall be removed from service if conditions such as the following are present:
  • Missing or illegible sling tag.
  • Cracks or breaks.
  • Excessive wear, nicks or gouges.
  • Minimum thickness on chain links shall not be below the values listed in the TABLE OF WEAR.
  • Stretched chain links or components.
  • Bent, twisted or deformed chain links or components.
  • Evidence of heat damage.
  • Excessive pitting or corrosion.
  • Lack of ability of chain or components to hinge (articulate) freely.
  • Weld splatter.

Table of Wear for Alloy Chain

  • If chain is worn to less than the minimum allowable thickness (T), remove the chain from service.

Alloy Chain Table of Wear Chart
Size of Chain Material Diameter

Minimum Allowable Thickness (T)

inches mm Grade 80 Grade 100 Grade 80 Grade 100
1/4" 7mm .0274 .2790   .2390
3/8" 10mm .3920 .4040   .3420
1/2" 13mm .5100 .5290   .4430
5/8" 16mm .6300 .6250   .5460
3/4" 20mm .7810   .6870  
7/8" 22mm .9060   .7500  
1" 26mm 1.032   .8870  
1-1/4" 32mm 1.250   1.091  

Alloy Chain Sling Definitions


  • An organization of scientists, engineers and other professionals whose primary function is the development and writing of standards for implementation on a national level.
  • These standards would apply to wire rope slings, web slings, round slings, chain slings, blocks and hardware incorporated within this publication and/or site. ASME B30.9, B30.10 and B30.26 standards apply.
  • A federal regulatory organization with broad national indictment and enforcement powers.
  • One of O.S.H.A.’s primary functions is the enforcement and regulations of those standards written by A.S.M.E., and adopted by O.S.H.A.
  • Their enforcement powers would apply to the use of all items found within this publication and/or site.
  • CFR Titles 29 Part 1926, dated 2011.
  • The average load or force at which the product fails.
  • The maximum load or force which should ever be applied to the product.
  • The long standing federal standards on slings, regulated by O.S.H.A., uses a typical design factor of 5 to 1; that is a resultant working load limit of 20%, of the assembly minimum break strength.
    • (May vary on some products).
  • For example: Alloy Chain uses a 4:1 factor. The newly written C.V.S.A. standards on tiedowns enforced by the D.O.T. use a typical design factor of 3:1; that is a resultant working load limit of 33% of the assembly minimum break strength.
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