Lifting chains are typically classified by grade, which indicates the strength and quality of the chain. The most common grades of lifting chains are Grade 80 and Grade 100.
Grade 80 lifting chains are made from a special alloy steel that has a high strength-to-weight ratio, making it suitable for lifting heavy loads. They are typically marked with the letter "G" and the number "80" stamped onto each link.
Grade 100 lifting chains are made from an even stronger alloy steel than Grade 80, making them ideal for even heavier lifting applications. They are typically marked with the letter "G" and the number "100" stamped onto each link.
It is important to choose the right grade of lifting chain for the specific application, as using a chain that is too weak or of insufficient quality can lead to accidents and injuries. In addition, it is important to inspect the lifting chain regularly for signs of wear or damage, and to replace any worn or damaged links immediately to ensure the safety of the lifting operation.