Grade 70 Chain

About

Grade 70 chain is commonly referred to as transport chain, tie down chain, binder chain, or trucker’s chain. This high-strength chain is manufactured from heat-treated, low-alloy carbon steel, making it a dependable choice for cargo securement and transport applications. Most often used for securing loads on trailers, Grade 70 chain is also suitable for towing, logging, safety, and oil field applications. It features a standard link design and is easily recognized by its gold or yellow chromate finish - the industry standard color for this grade. Each link is clearly marked for quick and accurate identification. All Grade 70 chain offered is heat-treated and tested for strength to ensure consistent performance and durability. These products meet or exceed NACM and ASTM specifications. Grade 70 chain is designed strictly for tie down use and should never be used for overhead lifting. For higher strength requirements, explore our Grade 80 , Grade 100 , or Grade 120 chain and tie down assembly options. Grade 70 Chain Specifications (NACM) All Grade 70 chain products meet or exceed standards established by the National Association of Chain Manufacturers (NACM). The chart below outlines key specifications, including working load limits by chain size, to help you select the right option for your application. Nominal Chain Size Material Diameter WLL (Max) Proof Test (Min) Min Breaking Force Inside Length (Max) Inside Width (Min) in mm in mm lbs kg lbs kN lbs kN in mm in mm 1/4 7.0 0.281 7.0 3,150 1,430 6,300 28.0 12,600 56.0 1.24 31.5 0.38 9.8 5/16 8.7 0.343 8.7 4,700 2,130 9,400 41.8 18,800 83.6 1.29 32.8 0.44 11.2 3/8 10.0 0.406 10.3 6,600 2,990 13,200 58.7 26,400 117.4 1.38 35.0 0.55 14.0 7/16 11.9 0.468 11.9 8,750 3,970 17,500 77.8 35,000 155.4 1.64 41.6 0.65 16.6 1/2 13.0 0.531 13.5 11,300 5,130 22,600 100.4 45,200 200.8 1.79 45.5 0.72 18.2 5/8 16.0 0.630 16.0 15,800 7,170 31,600 140.4 63,200 280.8 2.20 56.0 0.79 20.0 3/4 20.0 0.787 20.0 24,700 11,200 49.400 219.6 98,