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Ring materials
| FGLF5 |
unitary, Ø of 25 to 120 mm |
standard, equivalent: Kl, FI 3. GHS 1 series greater than 300 pieces |
| FGL |
jets, Ø of 20 to 40 mm |
all series, small standard diameters, equivalent : K2
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| F30 |
unitary, Ø of 120 to 200 mm,
h 1 > 4 mm
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series greater than 300 pieces |
| FGL F51 |
unitary, Ø of 28 to 150 mm,
h 1 > 4 mm |
equivalent: GZ (SNCF) series greater than 300 pieces |
| FGL F52 |
unitary, Ø of 120 to 200 mm, h1 > 3.5 mm |
standard, equivalent : K3 series greater than 300 pieces |
| FGLF63 |
TREATED, unitary, Ø of 30 to 80 mm |
specific 2-stroke, equivalent; IKA, GHS 2 |
| FGLF54 |
unitary, capable of 4. Ø from 30 to 60 mm |
standard, equivalent: Kl or GHS 1 series greater than 2,000 pieces |
| FGLF56 |
static, Ø above 300 mm |
standard, all series, large diameters |
| FGLF56 |
tubes, centrifugal, Ø of 40 to 300 mm |
standard, series < 300 pieces up to Ø200 mm, all series above Ø200 mm |
| FGLF57 |
tubes, centrifugal, Ø of 40 to 120 mm |
spheroidal graphite, series above 2,000 pieces, equivalent: Kl 3 |
| FGLF68 |
nitary, Ø of 25 to 200 mm |
CrMo 50-50 |
| Z 170 CS 15 |
tubes or top cast |
tubes |
| Z 200 CD 13-2 |
tubes or top cast |
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| S 6-5-2 |
tubes or top cast |
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| BRONZE UE 12 |
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Cast iron rings: this cast iron is not defined by the normal cast iron standards which cannot be applied to thin mechanical parts such as piston rings.
The standard ISO 6621/3 defines ring materials by their physical characteristics. Standard grey cast irons class 10, sub-class 12 have a typical elasticity module of E = 100,000 N/mm2 with a minimum hardness of 95 HRB and a flexion resistance of 350 N/mm2.
This class 12 is applicable to serial manufactured rings of sufficient quantity, diameter 30 to 200 mm. The cast iron is produced in an electric furnace; analysis varies according to the size of the unitary casing model. In this case it is a pearlitic cast iron.
For production series not indicated above, iron cast in centrifugal tubes is used or, for smaller diameters, top cast iron is used. These cast irons are of class 11. We are able to manufacture rings made of spheroidal graphite cast iron with an elasticity module of 160,000; this is a class 50 cast iron. In the case of rings for exhaust joints working at very high temperatures, we use steel type Z170 CS 15.
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