Hardness:Professional terms in physics,The ability of a material to locally resist hard objects pressed into its surface is called hardness
The local resistance of solids to the invasion of external objects,it is an index to compare the hardness of various materials.
As different test methods are specified,，so there are different hardness standards. There are：Brinell HB，Vickers HV，Rockwell C HRC，Rockwell B HRB，Leeb HLD,different indicators can be converted to each other
https://en.wikipedia.org/wiki/Hardness_comparison
Now, Zhongshan XRD Shredder Machine Co., Ltd use very high hardness blade,can shredding most Bulky waste, Household waste, Medical waste,Organic waste (kitchen garbage, fruits, vegetable market etc.), Paper mill waste , Hazardous waste , Industrial waste, etc.
In the next article, we will introduce the classification of blades
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