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A 6mm lifting chain is a common specification used in lifting and hoisting operations.

2025-08-13

rizhi

A 6-millimeter lifting chain is a common specification used in lifting and hoisting operations, favored for its strength, durability, and relative lightness. Nominal diameter: 6 millimeters refers to the diameter of the chain material (round steel). This is a parameter that identifies the specifications of the chain. Grade: The common grade is G80 (equivalent to the international standard ISO 3077 or the national standard GB/T 20946's level 80). The meaning of G80: 'G' stands for 'Grade', and '80' indicates that the material has an ultimate tensile strength of 800 N/mm² (Newtons per square millimeter). Single limb working load: For a 6mm G80 chain, it is typically around 1.25 tons. Breaking load: The G80 grade requires the breaking load of the chain to be four times its working load. Safety factor: The G80 grade corresponds to a safety factor of 4:1 (breaking load / working load = 4).

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