Forging Manganese Centrifugal Casting Steel Spool Sleeve

Product conceptA heavy-wear, non-standard spool sleeve that combines the best of two worlds: the near-net shape and ultra-clean bore of centrifugal casting with the grain refinement and impact toughness of open-die forging. The result is a custom-length sleeve that survives both high-velocity abrasion and repeated shock loading—something neither pure casting nor bar-stock machining can deliver alone.     Key steel grades Hadfield-type austenitic manganese: Mn12-14 % (1.3401, X120Mn12, ASTM A128 Grade C) Modified Mn-Cr-Mo for higher yield: Mn8-10 %, Cr2 %, Mo0.5 % (custom melt) Carbon range 1.0–1.3 % to maximise work-hardening (up to 500 HB in service) All heats vacuum degassed and calcium treated for inclusion shape control Manufacturing route Centrifugal casting → 200–1 200 mm OD × 50–300 mm wall × max. 2 500 mm long Cut casting to sleeve blank → 100 % UT / RT inspection to ASTM A609 Level 2 Hot forge over mandrel → minimum 3:1 forge ratio, closing micro-shrinkage…

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