August 18, 2022

Wuxi Xingye Special Steel Co., Ltd

Manufacturer of Finished mandrels & Hollow Mandrels & Forged products

Tool steel H13 forged mandrels from China manufacturer

Material: H13 (4Cr5MoSiV1)

Size of mandrel bar: Dia 90mm-500mm, Length<=18.5m

Chemical Composition:



Mandrel Bars are one of the key pieces of tooling required during the production of Seamless Tubes and Pipes. Once the billet has been pierced, the Mandrel Bar supports the tube shell internally during elongation and wall thickness reduction.

SizeTensile Strength (Mpa)Yield Strength (Mpa)Elongation (%)Reduction of Area (%)Impact Value (J)Hardness (HRC)


Our mandrel bars are manufactured using the following processes:

  1. Steel making (EBT + LF (VD) + ESR);
  2. Forged using both hydraulic press and rotary forging;
  3. Annealing;
  4. Rough machining;
  5. Magnetic testing;
  6. Heat treatment – either vertical or horizontal;
  7. Ultrasonic testing;
  8. Finish machining including threading if required;
  9. Chrome plating; and
  10. Thread phosphating.