Daido Steel - NAK80
Daido High Performance, High Precision Plastic Mould Steel

Delivered Hardness:
Pre-hardened to HB344-400

Chemical Content(%):(For reference only)
C Si Mn Ni Cu Mo Al
0.15 0.3 1.5 3.0 1.0 0.3 1.0

Comparable Standard:
AISI P21 Modified, Vacuum Re-melting

Characteristics:

  • Solution-treated and Age-hardened to 37-43 HRC
    Can be processed in delivered condition without heat treatment
  • Ni-Al-Cu Age-hardening steel
    Good Machinability
    Can be easily ground after EDM processing
    Good welding performance
    Good dimensional stability
    Uniform surface and core hardness
  • Special Melting Process
    Can be polished up to #8000 mirror finishing
    Excellent photo etching and EDM properties

Major Application:
High performance, high precision plastic mould
Transparent or mirror finishing
High-requirement EDM surface finishing

Grinding/Polishing:
Can be machining in delivered condition without extra heat treatment process

Typical Polishing Procedures:

  • Grinding (#220 -> #320 -> #400)
  • Emery Paper Polsihing(#320 -> #400 -> #600 -> #800 -> #1000)
  • Diamond Paste finishing(#1200 -> #1800 -> #3000 -> #8000 -> #14000)

 


 LKM Steel Rainbow Chart