NAK55 Pre-hardened Plastic Mold Steel – Excellent Machinability & Polishing Performance

Product Details

Product Description

Product Description
【Key Features 】Pre-hardened (HRC 37–43), ready to use without heat treatment
Excellent machinability and EDM performance
High dimensional stability after processing
Superior polishing and photo-etching properties
Good weldability and nitriding response
Ideal for high-gloss plastic parts and mirror surface molds
【Product Description / 】NAK55 Tool Steel – Premium Pre-Hardened Steel for High-Precision Plastic Molds
NAK55 is a pre-hardened plastic mold steel widely used in high-precision injection molds. With hardness ranging from HRC 37–43, it is delivered ready to use and offers excellent machinability, polishing performance, and dimensional stability. Its fine microstructure makes it ideal for molds requiring mirror finishes and tight tolerances.
Chemical Composition (%):
ElementCSiMnCrMoNiAl

Content

~0.15

0.3

1.5

1.0

0.3

1.0

Typical Applications:
Plastic injection mold bases and inserts
High-gloss and transparent product molds
Consumer electronics and automotive molds
Photo-etched and engraved mold components
Suitable for mirror polishing and EDM
Delivery Condition:
Pre-hardened to HRC 37–43
Available in flat bars, round bars, and blocks
Machined or forged surface
Available Sizes:
Round bar: Ø20mm – Ø300mm
Flat bar: Thickness 10–300mm, Width up to 800mm
Custom dimensions and machining available
【Logistics & Services】MOQ: 10 KG
Lead Time: 3–7 working days
Packing: Plastic film + steel belt + wooden pallet/crate
Shipping: Global delivery by sea, air, or courier
Support: Mill Test Certificate (MTC), Third-party inspection available
Service: Sample cutting, surface machining, technical guidance

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