High nickel content makes the rolls have good corrosion resistance and thermal stability, making them suitable for high-temperature and high-pressure rolling environments. The acicular bainite structure has good strength and toughness and can withstand high pressure and impact loads, ensuring the stability and safety of the rolling process. The spherical graphite structure of ductile iron provides better lubricity and wear resistance, reduces friction with the metal blank, and extends the service life of the roll. This material has good chilling and hardening properties and can maintain good hardness and shape stability at high temperatures to ensure the dimensional accuracy of rolled products. High-nickel acicular bainite ductile iron rolls have wear resistance and can withstand the friction and wear of metal blanks during high-speed rolling, extending the service life of the rolls. The SGAII roll can improve the production efficiency of the rolling mill, and reduce downtime during the production process and the frequency of roll replacement. The roll is suitable for various finishing mills and intermediate rolling mills and can meet the rolling needs of metal billets of different sizes and materials.