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Spheroidal graphite cast iron or ductile cast iron or nodular cast iron

Characteristic of this material is given by the graphite that, instead to appear in form of flakes, is in form of spheroids thanks to the effect of magnesium on it.
The spheroidal cast iron presents a significant improvement of all the mechanical characteristics.
It also has a property that is unknown to the grey cast iron: the ductility.
Our spheroidal cast iron are obtained with the best certified raw materials, from the  spheroidal pig iron to the ferroalloys.


According to the european standard UNI EN 1563 the spheroidal cast iron in European Union is indicated with the acronym:

EN-GJS-XXX-YY
EN      = European Norm
GJS    = Spheroidal graphite cast iron
XXX  = number indicating the lowest tensile strenght  (Rm) in MPa
YY      = Percentage elongation

Our technicians will advise you in choosing the suitable material to meet your needs.

According to the percentage of pearlite contained inside of the matrix, the spheroidal cast irons differ in:

Ferritic Spheroidal cast irons


The ferritic spheroidal cast irons are constituted from nodules of graphite in a completely ferriric matrix.
This structure gives to the cast irons a good ductility, impact resistance, tensile strength and yield strength equivalent to those of a non-alloyed steel.


#Material designation
Symbol
Material designation
Number
 0,2 % Proof strenght
(Rp0,2/MPa/min)
Tensile strenght
(Rm/MPa/min)
Elongation
(a % min)
Brinell hardness
(min-max)
1EN-GJS-400-185.310525040018160-180
2EN-GJS-400-155.310625040015160-180
3EN-GJS-450-105.310731045010160-180



Micrographies of the castings we produce.




High-impact strength Ferritic Spheroidal cast irons


These spheroidal cast irons own,  in addition to all the features of the ferritic spheroidal cast irons, a greater impact strenght. 
Their field of application  is optimal in environments with low temperature.

#Material designation
Symbol
Material designation
Number
 0,2 % Proof strenght
(Rp0,2/MPa/min)
Tensile strenght
(Rm/MPa/min)
Elongation
(a % min)
Brinell hardness
(min-max)
1EN-GJS-350-22-LT5.310022035022140-170
2EN-GJS-400-18-LT5.310324040018160-180

Micrographies of the castings we produce.



Ferritic-Pearlitic Spheroidal cast irons 

The ferritic-pearlitic spheroidal cast irons have a mixed matrix composed from ferrite and pearlite. 
They are obtained by adding pearlite formers such as Copper (Cu), Chromium (Cr) and Tin (Sn).
They have intermediate properties between the  ferritic cast iron  and the pearlitic one and have a good workability. 


#Material designation
Symbol
Material designation
Number
 0,2 % Proof strenght
(Rp0,2/MPa/min)
Tensile strenght
(Rm/MPa/min)
Elongation
(a % min)
Brinell hardness
(min-max)
1EN-GJS-500-75.32003205007170-190
2EN-GJS-600-35.32013706003190-230

Micrographies of the castings we produce.





Pearlitic Spheroidal cast irons


The pearlitic spheroidal cast irons have a matrix almost completely pearlitic, with small amounts of ferrite around the graphite nodules.
They posses a high tensile strength, good wear resistance and a moderate machinability. 


#Material designation
Symbol
Material designation
Number
 0,2 % Proof strenght
(Rp0,2/MPa/min)
Tensile strenght
(Rm/MPa/min)
Elongation
(a % min)
Brinell hardness
(min-max)
1EN-GJS-700-25.33004207007170-190
2EN-GJS-800-25.33014808003212-280


Micrographies of the castings we produce.