Steel Glossary
Daido NAK80

Chemical Composition %
C Si Mn Cr Mo Ni Al Cu
Typical Composition (Weight %) 0.12 0.3 1.5 0.3 0.3 3.2 1.0 1.0

Mirror-polishable plastic mold steel, pre-hardened to 40 HRC. The vacuum remelting process ensures the highest purity of this steel. It is weldable with the same alloy, and subsequent post-weld heat treatment results in a homogeneous microstructure with uniform hardness without a heat-affected zone.

NAK80 is used for manufacturing plastic molds with large cross-sections and very high requirements for polishing. It has proven particularly effective in molds for headlights, bumpers, dashboards, and generally molds for visually demanding parts. NAK80 is suitable for thermosetting plastics and thermoplastics. Fiber-reinforced plastics usually require a PVD coating.

NAK80 is a trademark product of the Japanese manufacturer Daido Steel. Gebr. Recknagel distributes NAK80 as the exclusive stockholding sales representative for Central Europe.

Save Time and Costs:
Time and Cost Saving - NAK80
Microstructure - NAK80
Excellent Polishability
Polishability - NAK80
Seamless Weldability
Typical Hardness Distribution after Welding NAK80

No hardness differences after welding when subsequently post-weld heat treated.

Weldability - NAK80
Weldability Diagramm - NAK80
Excellent Machinability
Drilling - NAK80
Rough Milling
Rough Milling - NAK80
Finish Milling
Finish Milling - NAK80
Cutting Data Recommendations NAK80
Cutting Data Recommendations - NAK80
Thermal Conductivity
Thermal Conductivity - NAK80

NAK80 demonstrates a high thermal conductivity due to its particularly favorable alloy composition, resulting in shorter cooling times.

Impact Toughness

Notched U-Shaped Test

Notched U-Shaped Test - NAK80
EDM (Electrical Discharge Machining)

Easily perform fine electrical discharge machining without an increase in hardness of the machined surface.

Electrical Discharge Machining - NAK80
Nitriding - NAK80

Hardness reduction and/or distortion may occur with any treatment above 520°C.

Microstructure - NAK80

The provided values are always representative technical data based on our investigations. If not otherwise stated, they do not constitute guarantees. Please seek individual consultation for specific cases.

Material info


Daido NAK80

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