PB (Plate Mill Back up Rolls)
"Huge" and "High Quality" Rolls
All back up rolls manufactured by JSW are forged steel products. Compared with cast steel products, forged rolls have high fatigue strength and spalling resistance. All users in Japan use forged back up rolls at present.
JSW has high ability to manufacture "huge" and "high quality" steel products.
Plate mill Back up roll (PB roll) is no exception. JSW can manufacture heavy PB rolls by forging. In addition, JSW can manufacture high-Carbon-Cr-Mo steel that obtains good combination of both high wear resistance and high resistance to thermal shock cracking that lasts until the scrap diameter.
Development of PB Rolls
JSW has been developing a manufacturing process to enlarge roll size. At the beginning, the size of PB rolls was 70Ton Class. However, thanks to the success of material development, JSW has already succeeded in manufacturing and delivering 240Ton Class "Huge" PB rolls which are the largest size all over the world.
JSW has already supplied more than 400 pieces of PB rolls and enjoy a high reputation among many domestic and overseas customers. JSW also has a lot of supply experiences of PB rolls over 200Ton manufactured from gigantic ingots (350Ton ～ 600Ton).
