Hi Chrome Iron

Hi Chrome Iron

High Chrome White Iron was developed to improve the wear resistance and impact properties of castings that traditional grey irons and steels could not match. When the proper proportions of elements are combined during the melting process, the resulting chemical composition, in addition to the appropriate heat treatment, creates this unique and extremely hard material. The controlling standard used, ASTM A532, provides a range of materials suited to many different material processing applications where hardness values can range from 444 to 744 HBW (46-67 RC). These properties are achieved through the combination of eutectic carbide formation during casting solidification and promoting a martensitic matrix with some secondary carbides with the proper heat treatment. These processes are closely controlled to ensure the selected material meets the needs of the application in which the casting is going to be used.

Key Notes

  • The chromium in high-chrome white iron reduces the cooling rate required to produce carbides throughout the material, allowing massive castings to be manufactured with carbides throughout their section thickness during the normal solidification encountered in the casting process.
  • Excellent for use in the transport of abrasive mediums

To achieve the best abrasion resistance for your application, it is important to work closely with MACA personnel. The abrasive environment of your application, coupled with the microstructure of chrome white iron, can result in drastic differences in the service life of your part. The design assistance phase must focus on determining which areas of application will sustain the greatest wear and how to ensure the highest quality casting is produced. Chemistry is carefully engineered to provide the best size and shape of carbides. The heat treatment is the final step in the manufacturing process, and it ensures that the microstructure is correct for your application. The heat treatment should be designed based on the chemistry of the part, its section thickness, and its desired properties.

Applications for Chrome White Iron

  • Pumps, impellers, and suction or bearing liners are some of the most common uses for chrome white iron.
  • Chute liners, apron-feed liners, and gyratory crusher liners are very common uses in the mining industry.
  • Recycling plant parts like blow bars, anvils, and throw shoes are best made in high-chrome white iron.
  • Hydro-transport parts like laterals, wyes, reducers, and elbows can be made with our chrome white iron.

The examples above are just a small fraction of the kinds of products that are made out of chrome white iron.