1. Size 
Round bar: Dia 10-150mm 
Flat: 15-90mm*210-610mm 
 

2. Steel grade 
JIS NAK80/GB P80 
 

3. Delivery Condition 
Pre-hardened: 37-43HRC 

4. Application 
Used for high-grade mirror mold 
Molds for transparent products, eg. Cosmetics containers, food containers and dailyl electrical appliances 
Used for the mold focusing on discharge machining surface 
Molds for such plroducts as fruit plate, foodbox. Computer casing, keyboards and automobile interior decorations. 
Used for plastics molds under long production at high precision. 
Molds for such products as electrical switches, multifunctional sockets, plugs, charger cashing and computer parts. 

5. Characteristics 
Very good workability and mirror polishing property, suitable for thermoset molding mold of general resin. 
Our NAK80 is a steel smelted by using refining degassing and SEP remelting, suitable for super-mirror molds with high polishing property requirements. 
The polishing property and workability are the best among the plastic mold steels. 
Supplied in pre-hardened state, suitable for direct mold cutting without heat treatment. 
After electric spark machining, the surface hardness is not increased, so that it is easy to repair and Polish the mold.