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This steel track group 600x171x47 is made for excavator Komatsu PC200-5. It is normally identified with part number 20Y-32-00013, 20Y-32-00014, 20Y-32-K1170, KM3807/45. It is forged with premium 50MnB manganese steel alloy. The surface hardness is 56°-62° HRc. The whole surface is heat-treated to maximize wear life. This item is produced with our patented machining technique. You get quality guarantee from Shengde Machinery, a factory of 26-year experience.