What grade of alloy steel chain should be used for crane hoisting slings?

The use of grade 80 alloy steel chain for crane hoisting slings is appropriate due to its high strength-to-weight ratio, which makes it ideal for lifting heavy loads safely. Grade 80 chains are specifically designed to meet stringent performance standards, making them suitable for overhead lifting applications. These chains can handle higher loads than grade 70 chains and possess superior fatigue resistance, which is critical for repetitive lifting tasks.

In addition to strength, grade 80 chains are often heat-treated to enhance durability and toughness, providing added safety during lifting operations. They are also color-coded, typically with a gold or yellow coating, to easily distinguish them from other grades, ensuring that operators can quickly identify the right chain for the job.

The other grades mentioned, while they each have their own uses, do not provide the same level of strength and safety as grade 80 when it comes to crane hoisting slings.