This is Shaanxi Tongxin Continuous Cast Tube Tech Co.ltd, an exclusive manufacture in producing Continuous Cast Iron Hollow Bar which is..

A high quality alternative to castings due to:

No porosity, slag, shrinkage or other typical casting defects

Dense, fine-grained microstructure

Thin wall tube Min. 7mm only

No pattern or tooling costs

An excellent cost-saving alternative to low-medium carbon steel because of:

Better machinability - up to 3 times faster with better chip control (no more long, tangled, sharp chips)

Minimized deburring

Longer tool life

Improved wear resistance

10% lighter weight

Quieter due to vibration damping

30-70% material saving compare with solid bar for hollow parts

Machined parts in these and other industries are already benefiting from Tongxin material advantages:

Fluid Power --Oil & Gas—Industrial—Defense--Primary Metals--Automotive Aftermarket

Proudct Range available 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: