1. Material: 40Cr or 42CrMo
 
2. Dimension: Depending on the specification of Tool Maker
 
3. chisel type: Moil Point, Blunt Tool, Flat, wedge
 
4. Heat Treatment: 
Austenting Temperature 810~850 (20min/inch) 
Cooling Water oil cooling 
Tempering 250~300 (1hr/inch) 
 
5. Mechanical Properties: 
Surface Hardness HRC51± 3 
Core Hardness HRC35± 3 
Tensile strength(min) 1250N/mm² 
Yield point (min) 950N/mm² 
Elongation 10~14% 
Reduction of Area 35~40% 
Impact work 23~28 ft1b 
Grain size 7.0~8.0