Notice: The following table does not include all the accessories that we can produce. If you need bars from other brands, or know the OEM serial number of the blow bars that you are looking to replace, or can provide the drawing of the bars that you need to customize, please feel free to contact us by email or call.

In chrome steel, carbon is chemically combined to form chromium carbide. Its wear resistance comes from these hard carbides within a durable matrix, which create obstacles that impede movement. This results in high strength but at the cost of reduced toughness.

To prevent brittleness, the blow bars must undergo heat treatment with strict adherence to specific temperature and annealing time parameters. Chrome steel typically achieves a hardness of 60 to 64 HRC, while its impact strength remains very low at just 10 J/cm².

To avoid fracture of chrome steel blow bars, the feed material must be free of any unbreakable components.

The wear resistance of manganese steel, which has an austenitic structure, is due to the phenomenon of work hardening. When subjected to impact and pressure, the surface layer of the austenitic structure becomes hardened. Initially, the hardness of manganese steel is around 20 HRC, and its impact strength is approximately 250 J/cm².

Through work hardening, the surface hardness can increase to as much as 50 HRC. The underlying, unhardened layers contribute to the steel's high toughness. The depth and degree of hardness of the work-hardened layer depend on the specific application and the type of manganese steel used.

With a long history of use, manganese steel is now primarily employed in applications such as crusher jaws, crushing cones, and crushing shells (including mantles and bowl liners). In impact crushers, manganese blow bars are recommended only for processing less abrasive, very large feed materials, such as limestone.

Martensite is a carbon-saturated form of iron produced through rapid cooling. During subsequent heat treatment, carbon precipitates from the martensite, enhancing both strength and wear resistance. The hardness of this steel ranges from 44 to 57 HRC, with impact strengths varying between 100 and 300 J/cm².

In terms of hardness and toughness, martensitic steels occupy a position between manganese steel and chrome steel. They are typically used when impact loads are insufficient to work-harden manganese steel, or when a combination of good wear resistance and resistance to impact stress is needed.

Metal matrix composites (MMCs) integrate the high strength and durability of a metallic matrix with the exceptional hardness of ceramic materials. The manufacturing process involves creating porous preforms from ceramic particles, into which molten metal is infiltrated, filling the interconnected ceramic network. A key aspect of this casting technique lies in effectively combining two materials with significantly different densities—steel at approximately 7.85 g/cm³ and ceramic ranging from 1 to 3 g/cm³—ensuring thorough infiltration and bonding.

This unique combination results in blow bars that exhibit outstanding wear resistance while maintaining high impact strength. Blow bars manufactured from these ceramic-based composites achieve a service life three to five times longer than those made from conventional martensitic steel.