Which type of chain is the strongest for the same size of link?

The strongest type of chain for the same size of link is the alloy chain, specifically referred to as A-8. Alloy chains are made from high-strength steel, which allows them to carry significantly more load compared to other types of chains that have the same link size. This increased strength comes from the unique manufacturing process and the specific metallurgical properties of alloy chains, which enhance their resistance to wear and overload.

In contrast, other types of chains like proof coil, high test, and transport chains are designed for specific applications and certain weight limits. While they can be strong and useful in various situations, none of them can match the tensile strength and durability of alloy chains in similar dimensions. Alloy chains are commonly used in heavy lifting, rigging, and high-demand applications where reliability and strength are critical, further illustrating why they are considered the best choice among the options given.