for more information, please contact Jerry by Double metal cylinder liners are made with a forged steel outer shell and a abrasion and corrosion resistance of a high chromium iron inner sleeve.The dimensional accuracy should be strictly controlled in the production process, which can ensure they are easy and steady to install.With high finish and high hardness the inner sleeve has good character of wear resistance,corrosion-proof and long using life.This product is suitable for all kinds of bad working conditions. Its normal life is more than 800 hours. Production Process: The bi-metal cylinder Liner of our company combined with the advantages of abrasion hot-forging out liner and anticorrosion high chrome inner liner. The out liner is made of high quality carbon steel by hot pressing forming. Its tensile strength is over 900000psi. The inner liner is made of high-chromium alloy by centrifugal casting.