There are three types of steel that are commonly used to make truck frames: high-strength low-alloy (HSLA) steel, heat-treated carbon-manganese steel, and advanced high-strength steels (AHSS). HSLA steel is the most common type of steel used for truck frames. It has a higher strength-to-weight ratio than other types of steel, making it ideal for use in truck frames. Heat-treated carbon-manganese steel is another common type of steel used for truck frames. This type of steel is known for its durability and resistance to wear. AHSS is the strongest type of steel used for truck frames. It is designed to be lightweight yet strong, making it ideal for use in trucks that need to haul heavy loads.