Wear parts insert TIC material, 2-4 times lifetime, highly recommended!

Shredder hammer

About Hammers –  Our hammers are made in austenitic manganese steel and proprietary low-alloy steel.  Sinco also makes a differentially-hardened, low alloy steel hammer that is extremely hard on the bottom and possesses a softer material around the pin to keep the pin from wearing out. In essence, we are able to right-size the metallurgy of the casting to the particular application, resulting in the most wear-resistant part available.

Why Manganese Steel?

Manganese steel shredder hammers “self-polish” in the pin holes, which minimizes wear on the pin shafts.  In contrast, low alloy steel hammers, which some shredders use, don’t have this characteristic and can cause rapid wear on the pins.

Manganese steel also has a very high resistance to crack propagation. If operating conditions cause the yield strength in a region to be exceeded and a crack forms, the crack tends to grow very slowly. In contrast, cracks in low alloy steel castings tend to grow rapidly, which can lead to quick failure and the need for replacement.

Austenitic manganese steel:

Chemical compositionC (Max)MnSiCrPS
Mechanical properties


UTS (KSI)YS (KSI)EL%Hardness(BHN)Charpy V-notch(room temp)
90-140 50-7024-40200-25090-160 ft.lb

High manganese steel hammer:

Low alloy steel hammer

Low alloy steel hammers often deliver a lower cost per ton than manganese hammers. With the high hardness no less than 450BHN, the low alloy steel hammer have better performance in crushing. Of course it required the hammer not crack which is common to happened in our competitors products.

Thanks to our technical engineer. We get alloy hammer with both good toughness and high hardness though special heat treatment process. The result is a long-wearing, durable wear hammer that delivers more tons between grate changes and less casting-related downtime.

Low alloy steel:

Chemical compositionC (Max)MnSiCrPSMoNi
Mechanical properties


Hardness(BHN)Impact strength(kg*m/cm2)