Spheroidal EN-GJS
(UNI EN 1563)
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) |
|---|---|---|---|---|---|---|
| 1 | EN-GJS-400-18 | 5.3105 | 250 | 400 | 18 | 160-180 |
| 2 | EN-GJS-400-15 | 5.3106 | 250 | 400 | 15 | 160-180 |
| 3 | EN-GJS-450-10 | 5.3107 | 310 | 450 | 10 | 160-180 |
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) |
|---|---|---|---|---|---|---|
| 1 | EN-GJS-350-22-LT | 5.3100 | 220 | 350 | 22 | 140-170 |
| 2 | EN-GJS-400-18-LT | 5.3103 | 240 | 400 | 18 | 160-180 |
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) |
|---|---|---|---|---|---|---|
| 1 | EN-GJS-500-7 | 5.3200 | 320 | 500 | 7 | 170-190 |
| 2 | EN-GJS-600-3 | 5.3201 | 370 | 600 | 3 | 190-230 |
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) |
|---|---|---|---|---|---|---|
| 1 | EN-GJS-700-2 | 5.3300 | 420 | 700 | 7 | 170-190 |
| 2 | EN-GJS-800-2 | 5.3301 | 480 | 800 | 3 | 212-280 |
Micrographies of the castings we produce.
