What grade of chain is represented by the letter 'T'?

The grade of chain represented by the letter 'T' is 80. This classification indicates the chain's strength and durability; specifically, grade 80 chains are known for their high tensile strength and are often used in applications requiring strength and safety, such as lifting and hoisting.

Grade 80 chains are typically manufactured from alloy steel, which enhances their strength-to-weight ratio compared to lower grade chains. This grade is specifically designed for rigorous use and is capable of handling heavier loads compared to lower grades. Additionally, grade 80 chains are often color-coded (usually painted yellow) to easily identify their grade in the field.

Understanding the significance of the grades is crucial, especially in contexts where safety and structural integrity are paramount. The distinction between these grades often comes down to their intended applications, with higher grades like 80 providing a more secure option for critical operations.