Yantai Fangle Metallurgy Group Co., Ltd.  

Product Name: Continuous Rolling Mill Mandrels for Producing Seamless Steel Tubes Model NO.: as the drawing Application: metal Processing Machinery Parts Material: Alloy Customized: Customized Standard: DIN, ASTM, GB Certification: CE, ISO9001 Condition: New Application Range: Continuous Rolling Mill,Mpm,Fqm,Pqf Trademark: FANGLE Transport Package: Woodern Case Specification: max 20m, Diameter 100mm-500mm Origin: China Product Description MPM & PQF mandrel bars are also named retained mandrels.Mandrel bars are the key parts during the production of Seamless Tubes and Pipes. once the billet has been pierced, the Mandrel Bar supports the tube internally during elongation and wall thickness reduction.Manufacturing process: Steel making (EBT + LF (VD) + ESR);Forged using both hydraulic press and rotary forging;Annealing;Rough machining;Magnetic testing;Heat treatment - either vertical or horizontal;Ultrasonic testing;Finish machining including threading if required;Chrome plating; andThread phosphating.MaterialAISI H13, X35CrMo V51 and 4CrMoSi V1Diameterup to 500mmLengthup to 20mThreadingAvailable,phosphotized after chromium platingchromium platinglength: whole working bodyW.th: 0.045/0.08dehydrogenation after chromium platingTestultrosonic test