Dynamic Cone Head, 360, 5 X 5 X 5/8 (Sizes mixed in each series), Fly, A8 Steel Chipper Blade

• Length 5" (127mm)
• Width 5" (127mm)
• Thickness 5/8" (16mm)
• Special Specs;
• Bevel Angle 31 Degrees
• Bolt Hole Size .781" Through Holes
• Fits the Following Chippers
• Dynamic Cone Head Model 360
• Replaces Dynamic Part Number 700255-0050

A8 is an air or oil hardening tool steel with more abrasion resistance than the S or H series tool steels, but much better toughness than D2 or similar high alloy semi-stainless and stainless steels. The working hardness is from 55 to 60 Rockwell C.
The alloy content is as follows:
C 0.50-0.60 Mn 0.50 Si 0.75-1.10 Cr 4.75-5.50 Ni 0.30 Mo 1.15-1.65 W 1.00-1.50 Cu 0.25 P 0.03 S 0.03
This steel is a good choice for a balance between hardness and abrasion resistance, it's well suited to larger cutting implements which must endure some shock and hard impacts to the edge, but also some "dirty" cutting and other direct wear. It’s balance of characteristics make it good for certain types of industrial cutters as well, which may not run clean during operation. These properties make it a good choice for larger outdoor brush chipper blade applications.