Fuyote's metal seal rings are made of alloy cast irons which are based on the iron-carbon-silicon system. Small amounts of alloying elements, Cr and Mo are added in gray and ductile cast irons to achieve high strength and also ensure the attainment of a specified minimum strength in heavy sections. In addition, alloying elements are used to increase the resistance to abrasive wear and extend service life.
The following are three kinds of materials that FUYOTE offers. For specific conditions please consult FUYOTE.
| Material | Process | Cost | Lifetime | Corrosion resistant | Scratch resistance | |
| Chromium Molybdenum Alloy | 15CrMo | Casting | Low | Low | Low | Low |
| General Chromium Molybdenum Alloy | 15Cr3Mo | Casting | Medium | Medium | Medium | Medium |
| High ChromiumMolybdenum Alloy | 15Cr6Mo | Casting | high | high | high | high |
Fuyote's metal seal rings are made of high alloy cast iron in a Rockwell hardness value of HRC 60~69. Recommended operating temperatures are between -50°C~200°C. As seal ring material has a direct effect on its sealing ability, we recommend that metal seal rings material should be selected according to different working conditions.
High alloy cast iron contributes to high strength, hardness, toughness, and creep resistance at specific heat treatment temperature. It is used in applications with demanding requirements such as heat, abrasive wear, and corrosion resistance. As a result high alloy cast iron could be suitable for floating seals operating conditions.
High alloy cast iron is produced by smelting iron-carbon alloys which have a carbon content more than 2%. It solidifies as a heterogeneous alloy, as a result it has more than one micro crystalline structure in the iron. Otherwise cast iron contain various alloying elements intentionally added to improve the properties, such as chromium and Molybdenum.
Chromium could form carbides, impact corrosion resistance, and to stabilize the structure for high temperature applications.Cr influence the fineness and hardness of pear lite and contributes to increase the amount and hardness of the eutectic carbides. And also Cr is the most effective element on abrasion resistance, toughness, corrosion resistance, resistance to the softening effect of heat, and for protection against oxidation. Molybdenum in high alloy cast irons is distributed between the eutectic carbides and the matrix. It is mainly contribute to promote deep hardening and improve high temperature strength and corrosion resistance. Martensite cast iron is preferred for superior abrasion resistance due to molybdenum hardens and toughens the pearlitic matrix. Molybdenum enhance corrosion resistance and improve high temperature strength and creep resistance in high alloy cast iron.
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