ISO9001 Quality Insurance System Certificate , Carrying our 2531\4179\8179\EN545, GB\T13295\17459\17457\17456 standard.

Our pipe has been past through ISO9001 Quality Insurance System Certificate , Carrying our 2531\4179\8179\EN545, GB\T13295\17459\17457\17456 standard strictly to assure the product quality all through the manufacture process.

Ductile cast iron is a kind of alloy of iron , carbon and silicon , in which graphite exists in the type of spherical, generally the size of graphite is 7~7 class, and spheriodization grade of the pipe should be controlled 1~3 class (spheroidization rate is not below80%). Thus after spheroidization, ductile cast iron possesses the nature of iron as well as the characteristics of steel. After annealing, its microstructure contains ferrite and a little pearlite possessing excellent mechanical properties.

Mechanical properties:

ST (Tensile Strength):  >=420MPa     Yield Strength(YS): >=300MPa

Bending Strength: >=590MPa          Elongation: >=10%

Chemical Composition:

C 3.5-4.0%   Si 1.9-2.6%   Mn 0.15-0.45%   P <=0.06%    S <=0.02%  Mg 0.03-0.06

Ductile cast iron pipe