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Plastic Mold Steels
Due to low carbon content, age hardening, and the availability of NAK weld
rod, hardness is lowered in the heat-affected zone during the welding process.
NAK55 can be re-aged to 40 HRc with no distortion or stress put into the mold.
Polish, texture and wear in the weld are indistinguishable from adjoining
"parent steel" on the finished product.
Machines up to 50% faster than P20 to a superior surface with negligible
dimensional change. Positive rake cutters with concave, chip breaking inserts
work best, and last up to twice as long as with P20 mold steels.
The soft recast layer (approximately 32 HRc) is much thinner and is easier to
remove than steels with a recast layer that is equivalent to their "as
quenched" hardness. With NAK55, no post EDM stress relieving is ever needed.
Age hardening eliminates the stresses inherent in quenched and tempered
steels. NAK55 is dimensionally stable and predictable over many years of
heating and cooling cycles.
- Surface Enhancements
VAR processing with uniform grain structure facilitates superior nickel,
chrome, titanium, and other coatings. Unique chemistry responds extremely well
- Texturing and Polishing
Exceptionally clean steel with uniform grain structure polishes beautifully
allowing superior texturing and photo etching.
Higher hardness ensures molds have a longer life than those made from P20,
particularly in gate, runner, and parting line areas.
The uniform, refined grain structure of NAK55
All technical and engineering data and suggested procedures,
specifications and applications contained in this publication are for general
information only. Daido Steel, International Mold Steel and/or their
distributors disclaim any and all express or implied warranties of
merchantability, suitability for any particular purpose or use, or freedom from
infringement of any patent, trademark or copyright. NAK80® is a registered
trademark of International Mold Steel, Inc. and Daido Steel Limited.
International Mold Steel, Inc.
Copyright © International Mold Steel,
DC53® Cold Work Tool Steel is a registered trademark of Daido Steel, Limited and International Mold
TOOLOX® (tool steels) is a registered trademark of SSAB
Superplast® is a registered trademark of Industeel USA (a division of Arcelor
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