Monster Metal™

Abrasion & Corrosion Resistant Cutters for Harsh Sewage Grinder Environments

Wastewater is tough on grinder cutters. Damaging abrasion wear and metal corrosion is caused by gritty material & acidic conditions in sewage. The combination of an abrasive and corrosive environment accelerates the loss of cutter material, resulting in the loss of cutter thickness and of tooth edges.

Traditionally, there is a trade-off between choosing material for abrasive environments and corrosive environments.  Hard alloy steel has been the traditional choice of material for abrasive environments.  Unfortunately, alloy steel is not a corrosion resistant cutter metal.  The corrosion resistant cutter choice has been stainless steel but unfortunately, it has low abrasion resistance.  Cutter material is typically selected based on the environment to which it will be exposed to optimize its performance & maximize cutter life. Regrettably, choosing a material suitable for one environment but not the other often leads to dissatisfaction with the cutter life.

Monster Metal is JWC’s solution to this problem – a steel alloy with superior abrasion resistance and excellent corrosion resistant cutter protection. Now you don’t have to choose between corrosion resistance or abrasion resistance. Monster Metal offers both, resulting in cutters that last longer in a gritty, corrosive wastewater environment.

What is Monster Metal?

JWC Monster Metal is an abrasion and corrosion resistant cutter alloy. It is a steel alloy with the right balance of carbon for strength and chromium for metal corrosion resistance. Monster Metal has a Rockwell HRc of 55-60 which is as hard as or harder than many alloy steel cutters used on grinders in the municipal market. Alloy steel has been the standard material choice for abrasive environments. Furthermore, Monster Metal has a high chromium content that is typically associated with stainless steel. Stainless steel has been the material of choice for corrosive environments.  It’s the combination of the abrasion resistance of alloy steel and the corrosion resistance of stainless steel that makes Monster Metal unique.

When should Monster Metal be used?

In a highly corrosive and highly abrasive environment, the typical alloy steel cutter exhibits faster wear.  The corrosive environment eats away the abraded areas and abrasive material wears down corroded areas. Accelerated wear of the alloy steel cutter is the result as the corrosion and abrasion hastens each other’s degradation process. With a stainless steel cutter, although the material is resistant to corrosion, it does not have the hardness to withstand an abrasive environment. The result is a stainless steel cutter wears fast in an abrasive environment.

Monster Metal solves these problems. Compared to alloy steel, Monster Metal is corrosion resistant which translates to less pitting. With less pitting, Monster Metal avoids the cycle of abrasion wearing the pitted areas and corrosion eating the abraded areas. Compared to stainless steel, Monster Metal has significantly less abrasion wear. In summary, Monster Metal excels in a combination corrosive and abrasive environment.

Additionally, when an application requires extremely hard cutters, Monster Metal is a great choice.  Extremely abrasive applications typically specify the hardest cutter materials for the longest life.  Monster Metal, with a Rockwell HRc of 55 to 60, is an excellent choice for those environments.

What products have Monster Metal?

JWC offers Monster Metal with an 11-tooth configuration on the following products.

Monster Metal Extended Warranty

JWC is confident Monster Metal will increase the cutter life of the grinder.  And JWC backs that confidence with an extended five-year limited warranty for units with Monster Metal cutters.  Please contact the JWC factory for the specific details of the warranty.

Product Availability

Monster Metal is currently available only in North America.


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