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Industrial Chain Grades

National Association of Chain Manufacturers ( NACM) logo

Grade 30 (ASTM Spec A413) - 3:1 Design Factor, Proof Coil, General purpose carbon steel chain, not for overhead lifting.

Grade 43 (ASTM Spec A413) - 3:1 Design Factor, High Test, Carbon Steel chain found in Agriculture, Construction, Logging, Towing and other industrial applications; not for overhead lifting.

Grade 63 (ASTM Spec A413) - 4:1 Design Factor, Alloy chain, heat treated and used by steel manufacturers; recommended for overhead lifting.

Grade 70 (ASTM Spec A413) - 4:1 Design Factor, Transport, Higher Strength Carbon Steel Chain that is heat treated and used for load securement, lashing and trawling; not for overhead lifting.

Grade 80 (ASTM Spec A391) - 4:1 Design Factor, Alloy chain, heat treated and primarily used in overhead chain lifting slings but is also used as a lighter weight, high strength tie down or rigging chain; recommended for overhead lifting by NACM, OSHA and ASME.

Grade 100 (ASTM Spec A973) - 4:1 Design Factor, Alloy chain, 25% higher strength per size than Grade 80 Alloy chain.  Primary use is overhead lifting chain; recommended for overhead lifting by NACM, OSHA and ASME.

Grade 120 (ASTM Spec A413) 4:1 Design Factor, Alloy chain, 50% higher strength per size than Grade 80 Alloy chain. According to the manufacturer, its unique profile increases strength, abrasion resistance and bending at a lower weight. 6:1 design factor with the same size and workload as G80's 4:1 design factor. Recommended by the Manufacturer for overhead lifting in rough industrial conditions.

NOTE: Companies involved in the plating or galvanizing industry or companies integrated with plating or galvanizing facilities should not use high carbon chain, including Grade 80 or Grade 100 chain in or around plating or galvanizing heated processes due to potential chain failure factors like liquid metal or hydrogen embrittlement.  Consult an expert metallurgist as part of the process.

Overhead Lifting is Dangerous Work, Only Competent People are Allowed to Perform.

OSHA regulations: slings SECTION 1910.184

Mechanical Drawing of Grade 70 Chain Hook

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