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Hardened steel liner

After being carburized and high frequency process, hardness of hardened steel liners (premium liners) can reach HRC58-62.  With a high degree of finish, wear resistance, corrosion resistance and a long life, our hardened steel liners are suitable for use under moderately corrosive mud conditions. Our hardened steel liner export volume accounts for 90% of China’s hardened steel liner export volume.

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