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NAK80 / AISI P21 Welding Wire

Material: NAK80 (Equiv. AISI P21)
Hardness: 37–43 HRC
✨ Super Mirror-Polish Steel

Application & Industry Performance: Premium choice for high-precision optical lenses, transparent plastic parts, and electrical discharge machining (EDM) mold surfaces. Delivers exceptional mirror polishability without weld line marks or pinhole defects.

Select Welding Process & Diameters

Choose between Laser Welding or TIG Welding wire specifications.

0.15
mm
Spool / Rods
0.2
mm
Spool / Rods
0.3
mm
Spool / Rods
0.4
mm
Spool / Rods
0.5
mm
Spool / Rods
0.6
mm
Spool / Rods
Custom
Other Sizes
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0.8
mm
10 rods / tube
1.0
mm
10 rods / tube
1.2
mm
10 rods / tube
1.6
mm
10 rods / tube
2.0
mm
10 rods / tube
2.4
mm
10 rods / tube
Custom
Other Sizes
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TECHNICAL DATA SHEET (TDS) & PROCESS GUIDE Standard: Daido NAK80 / AISI P21 (Pre-hardened Age-Hardened Steel)

1. Chemical Composition (wt%)

ElementCMnNiAlCuMoFe
Specification0.12–0.201.40–1.702.80–3.200.80–1.100.90–1.200.20–0.40Balance

2. Hardness & Welding Parameters

⚡ Laser Welding 0.15–0.6 mm

Preheat TempRoom Temp – 100°C
Pulse Power110–200 A
Shielding GasArgon ≥99.99% (3–5 L/min)
HAZ ImpactUltra-smooth deposit matching parent steel hardness

🔥 TIG Welding 0.8–2.4 mm

Preheat Temp150°C – 200°C Recommended
Welding Current35–100 A (DCEN)
Shielding GasArgon ≥99.99% (8–10 L/min)
Post-Heat ReliefSlow natural cooling

💡 Key Repair & Operation Instructions:

  • Age-Hardening Feature: Reaches 37–43 HRC directly upon deposit, completely eliminating hard spots and boundary lines during EDM and mirror polishing.
  • Mirror Finish Guard: High purity wire composition ensures zero porosity or micro-pinholes under high-magnification polishing.
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