ASTM Grade 120 Chain

Bending Resistance
The new profile of the G120 chain has up to 38% higher moment of resistance compared to regular round-link chains with the same diameter. Therefore, chain can withstand bending forces better than round-link chains and is well equipped for heavy applications.
Higher Design Factor
Same dimension of chain and workload, G120 offers a design factor of 6:1 compared to G80 with 4:1.
Color-Coded Corrosion Protection
G120 meets or exceeds the G100 NACM/ASTM-test requirements for lifting chains
Exceeds the 4:1 NACM design factor if G80 loading is used meets the NACM standard for heat resistance with 400° F meets the 20,000 cycle ASTM-Standard fatigue test for Grade 100



Technical Data:

  • Hardness approx. 41 HRC
  • Heat resistance up to 400° F
  • Nominal proof stress* 600N/mm2
  • Components fatigue tested to 20,000 cycles
  • Nominal breaking stress* 1200 N/mm2
  • Elongation min. 20%
  • *calculated acc. usual definition for round steel chain

Grade 120 chain was specifically designed to for extreme overhead lifting applications. Grade 120 Chain is an ultra-premium quality high strength alloy steel. Grade 120 Chain has a 50 percent increase in working load limit as compared to a similar size chain in Grade 80. This allows you to reduce the size of the chain depending on the working load needed. Grade 120 chains are also referred to as Grade 12, Grade 120 Winner Pro. Grade 120 Chain IS approved for overhead lifting.


Grade of Chain: NACM (National Association of Chain Manufacturers & ASTM (American Society for Test Materials) classify chains in various grades. The higher the grade, the higher the working load limit for the same size of chain.

Working Load Limit (WLL): (rated capacity) Is the maximum working load that should be applied In direct tension to an undamaged straight length of chain.

Proof Test: (manufacturing test force) Is a term designating the minimum tensile force which has been applied to a chain under a constantly increasing force In direct tension during the manufacturing process. These loads are manufacturing integrity tests and shall not be used as criteria for service or design purpose.

Minimum Breaking Force: The minimum force at which the chain during manufacture has been found by testing to break when a constantly increasing force is applied in direct tension. Breaking force values are not guarantees that all chain segments will endure these loads. This test is a manufacturer’s attribute acceptance test and SHALL NOT be used as criteria for service and design purpose.

Overhead Lifting: The process of lifting that would elevate a freely suspended load to such a position that dropping a load would present a possibility of bodily injury or Property damage.

Chain Size Inch Chain Size MM Working Load Limit (lbs) NOMINAL
9/32″ 7 5200 0.276 0.866 0.393 1.024 20800 0.874
5/16″ 8 6600 0.315 0.954 0.433 1.142 26400 1.040
3/8″ 10 10600 0.394 1.3 0.559 1.457 42400 1.747
1/2″ 13 17900 0.512 1.614 0.732 1.949 71600 3.091
5/8″ 16 27500 0.630 2.008 0.748 1.969 110000 4.820


Name: ASTM Grade 120 Chain

MOQ: 100 Meters

Package: Carton + Steel Pallet


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