NiTi Alloy

# Blue Heat Treatment

Blue heat treatment produces a distinctive cobalt-blue oxide surface by heating NiTi wire to 450–500°C. Like Gold treatment, it elevates the Af temperature above body temperature, yielding a predominantly martensitic alloy at 37°C. The resulting files are highly flexible and exhibit a unique 'pre-bend' memory: they can be bent by hand and retain a gentle curve that aids insertion into curved canals. Manufacturers report a minimum 40–65% improvement in cyclic fatigue resistance versus conventional M-Wire, depending on the system. Blue-treated files are well suited to single-file reciprocating techniques where fatigue life is particularly important.

## Metallurgical Properties

Af Temperature40–50°C

Phase at 37°CMartensite

FlexibilityHigh (pre-bendable, retains set)

Cyclic Fatigue≥40–65% greater than M-Wire

[Compare all heat treatments→](https://endo-guide.app/alloy/heat-treatment-comparison)

## Systems Using Blue Heat Treatment

[### Reciproc Blue VDW GmbH Reciprocating M-Wire · variable (5-8%) · 3 files Maximum Flexibility](https://endo-guide.app/system/reciproc-blue)[### Vortex Blue Dentsply Sirona Rotary Blue · .04/.06 · 16 files Blue Wire Crown-Down](https://endo-guide.app/system/vortex-blue)[### RACE EVO FKG Dentaire Rotary Heat-Treated · 4% · 3 files Heat-Treated 1-2-3 Sequence](https://endo-guide.app/system/race-evo)[### MG3 Blue Perfect Dental Rotary Blue · 3-10% · 5 files Heat-Treated MG3 for Improved Flexibility](https://endo-guide.app/system/perfect-mg3-blue)[### RC Blue Perfect Dental Reciprocating Blue · 5-8% · 3 files Blue-Treated Reciprocating Sequence](https://endo-guide.app/system/perfect-rc-blue)[### S-Blue Perfect Dental Rotary Blue · 4-10% · 4 files Entry-Level Heat-Activated System](https://endo-guide.app/system/perfect-s-blue)[### V-Blue Perfect Dental Rotary Blue · 4-6% · 12 files Blue NiTi with Convex Triangle Cross-Section](https://endo-guide.app/system/perfect-v-blue)[### NIC U-Series NIC Dental (Shenzhen Superline Technology) Rotary MaxTech · 2-9% (per file) · 24 files The Familiar Classic](https://endo-guide.app/system/nic-u-series)[### NIC V Blue NIC Dental (Shenzhen Superline Technology) Reciprocating MaxTech · 5-8% regressive · 3 files Three-Size Blue Reciprocation](https://endo-guide.app/system/nic-v-blue)[### NIC KD Blue NIC Dental (Shenzhen Superline Technology) Rotary MaxTech · .04/.06 constant · 16 files Constant-Taper Blue Matrix](https://endo-guide.app/system/nic-kd-blue)

## Related Clinical Links

NiTi collections

[Blue Heat Treatment](https://endo-guide.app/niti-files/blue-heat-treated-files)[Reciprocating Systems](https://endo-guide.app/niti-files/reciprocating-file-systems)[Rotary Systems](https://endo-guide.app/niti-files/rotary-file-systems)[Single-Use Systems](https://endo-guide.app/niti-files/single-use-niti-files)

Clinical use cases

[Severe Curvature](https://endo-guide.app/use-case/severe-curvature)[Calcified Canals](https://endo-guide.app/use-case/calcified-canals)

Related alloys

[Gold Heat Treatment](https://endo-guide.app/alloy/gold)[CM-Wire (Controlled Memory)](https://endo-guide.app/alloy/cm-wire)[C.Wire (Controlled Memory)](https://endo-guide.app/alloy/c-wire)[EDM Process (Electrical Discharge Machining)](https://endo-guide.app/alloy/edm)

![Uzm. Dt. Levent Yüksel](https://endo-guide.app/images/levent-yuksel.jpg)

Reviewed by

Uzm. Dt. Levent Yüksel

DDS · Endodontist

Endodontist — DDS, Hacettepe University; endodontics specialty training, Ankara University. 10+ years of clinical experience. Sole author and reviewer of EndoGuide content.

[About the author](https://endo-guide.app/about)[Editorial policy](https://endo-guide.app/editorial-policy)[Clinical profile](https://drleventyuksel.com/)

[Back to all systems](https://endo-guide.app/)

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