PPUK Foundry

Marine Materials

With a comprehensive catalogue of cast iron specifications on offer including compacted graphite iron (also known as vermicular), PPUK has a wealth of material specifications on hand covering a wide variety of dimensional options to support all current market demands for piston rings. Fully sourced within the UK to the highest possible standard, our cast iron material grades are unsurpassed in the market for operational performance. In addition PPUK has access to a wide range of alloy based materials to support the growing demands seen within a variety of industries which utilise metallic sealing rings.

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Piston Ring Materials Specification - P1

Application:
Large bore 2 stroke diesel engines fitted with PVA cylinder liners

Photo Micrographs

Pearlitic matrix with less than 3% ferrite and evenly distributed phosphides eutectics

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Piston Ring Materials Specification - P2

Application
Large bore 2-stroke diesel engines with Tarkalloy cylinder liners. Gives good wear properties and may be used with chromed cylinder liners.

Photo-Micrographs
Flake graphite I-A + B 3/5 (ISO 945 – 1975 (E))

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Piston Ring Materials Specification - P3

Application
Large bore 2-stroke diesel engines, gives good strength and wear properties.

Photo-Micrographs

Piston Ring Materials

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Piston Ring Materials Specification - P4

Application

The high duty piston ring cast iron may be used in marine diesel engines where increased ring toughness is required. It is normally used to provide resistance to ring breakage with excellent wear properties.

Photo-Micrographs

Pearlitic matrix image 1         

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Piston Ring Materials Specification - P5

Application

The high duty piston ring cast iron may be used in marine diesel engines where increased ring toughness is required. It is normally used to provide resistance to ring breakage with excellent wear properties.

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Flake graphite I-A 3/5 (ISO 945 – 1975 (E))

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Piston Ring Materials Specification - P7

Application

This material enjoys good strength resistance combined with excellent wear properties. It is suitable for diesel engines and some industrial applications such as compressors

Photo-Micrographs

Flake graphite I-A 3/5 (ISO 945 – 1975 (E))

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Piston Ring Materials Specification - P10

Application

For the latest generation 2 stroke diesel engines.

Photo-Micrographs

Pearlitic matrix with less than 5% ferrite and 3% Cementite

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Piston Ring Materials Specification - P13

Application

Various industrial applications

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Pearlitic matrix with approximately 20% ferrite.

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Piston Ring Materials Specification - P14

Application
High strength rings for various applications.

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Pearlitic matrix with approximately 5% ferrite Graphite VI + V (ISO 945 – 1975 (E))

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Piston Ring Materials Specification - P19

Application

General cast iron used for smaller rings.

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Pearlitic matrix with less than 5% ferrite, uniformly distributed flake graphite

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Piston Ring Materials Specification - P20

Application
High duty 4-stroke engines.

Photo-Micrographs

The matrix consists of tempered martensite with evenly distributed carbides

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Piston Ring Materials Specification - P24

Application
Various industrial applications.

Photo-Micrographs

Pearlitic matrix

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Piston Ring Materials Specification - P25

Application
Various industrial applications.

Photo-Micrographs

Austenitic matrix containing some carbides

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