This is Shaanxi Tongxin Continuous Cast Tube Tech , an exclusive manufacture can produce Continuous Cast Iron Hollow Bar and related products

(High quality Cylinder Sleeves, Piston ring, Hydraulic Retainer, Guide Sleeve, Oil packers, Bridge plug and so on of hollow parts)

Our Advantages of Continuous Cast Iron Tube:
----High Density----Zero Cast Defects ----Superb Wear Resistance ----Fatigue Strength----Corrosion Resistance ----Free Machining---Vibration Damping---Lighter Than Steel---Surface Finish---Prolong Tools Life... 

By far, our supply of hollow bars as follow:

1.Ductile Cast Iron Tube(ASTM A536  60-40-18/65-45-12/80-55-06…)
  ---nodularity 90% plus, ball diameter 7~8,ball number 400~600/mm2
  ---compare sand casting, at same strength, elongation increase 50~100%
2.Gray Cast Iron Tube (ASTM A48 class 30,40,50)
  ---Matrix: ferrite+pearlite
  ---σb=150-350 Mpa, HB=150-240, E=1.1-1.7*105Mpa
3. Alloy Gray Cast Iron Tube
  --CrNiMo Cast Iron --CrMoCu Cast Iron --High Nb Cast Iron--High Ni Cast Iron...

4.Specification:
  ---Cross-Section:Round,Rectangle,Elliptic,Hexagonal
  ---OD:60-320mm,Thickness:7-38mm

Application fields: