The optimal alloy depends on the material being processed, tramp iron contamination levels, and crusher operating conditions. AMCAST specialists evaluate each application to recommend the best balance of wear resistance and toughness.

As a general rule of thumb, the larger and harder your feed material is the softer your blow bar should be.  

Martensitic blow bars (often referred to as "low chrome") provide greater toughness and impact resistance, while chrome white iron blow bars offer superior abrasion resistance. The best choice depends on the specific crushing application.

For example:

Primary feed: 24" minus concrete with rebar.

Recommended Solution: Martensitic (low chrome) + WRI^TM or MasterCeramic^TM

Because WRI™ and MasterCeramic™ technologies are incorporated into most of AMCAST's blow bar solutions, the selection process focuses on identifying the technology and metallurgy combination best suited to the application, feed material, and operating conditions at each site.

Maximizing blow bar life requires more than selecting the right metallurgy. Feed consistency, crusher settings, and operating practices all influence wear performance. Reducing fines in the feed, minimizing moisture, and ensuring feeder grizzly bars remain effective can significantly reduce unnecessary wear and improve crushing efficiency. AMCAST evaluates both the application and operating conditions when recommending solutions designed to maximize wear life and lower cost per ton.

AMCAST manufactures blow bars for a wide range of OEM and aftermarket impact crushers, including many of the industry's most popular models. With extensive inventory stocked in the United States and a distribution network built to support aggregate, mining, asphalt, and recycling operations, AMCAST helps customers reduce lead times and avoid costly production interruptions.