N4 Pure Nickel (99.9% Ni) - High-Purity Nickel Supplier of Round Bars, Plates & Strip | Shanghai Hangbo Alloy Group
Date: 2026年7月31日 Categories: News Views: 349
By Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier | ISO 9001:2015 | Est. 2012
Contact: sales@hangboalloy.com | WhatsApp (Lisa): +86 13611656360
Quick Answer: What Is N4 Nickel?
N4 (GB/T 5235 / Ni 99.9) is commercially pure wrought nickel with Ni+Co >=99.9%, representing a higher purity tier than standard NI200 (>=99.0%). This elevated purity is essential for electroplating anodes, vacuum tube cathodes, and specialty chemical equipment where trace iron, copper, or carbon contamination can poison catalyst beds, discolor plated surfaces, or cause intergranular embrittlement. Shanghai Hangbo Alloy Group supplies N4 nickel as round bars, plates, and cold-rolled strip.
Key Properties
| Property | Value |
|---|---|
| Grade | N4 (GB/T 5235) / Ni 99.9 |
| Ni+Co Content | >= 99.9% |
| Density | 8.89 g/cm3 |
| Melting Point | ~1440C |
| Tensile Strength (Annealed) | >= 380 MPa |
| Elongation (Annealed) | >= 40% |
| Thermal Conductivity | ~80 W/m-K |
| Curie Temperature | ~360C |
| Key Standards | GB/T 5235, GB/T 2054 (plate), GB/T 2072 (strip) |
Product Overview
N4 represents the "high-purity" entry point in commercial pure nickel, bridging the gap between standard NI200 (>=99.0%) and ultra-pure electrolytic nickel cathode (>=99.95%). The additional purity is achieved through careful selection of charge materials and VIM melting with minimal refractory contact, ensuring iron contamination stays below ~0.02% and carbon below ~0.01%.
This purity translates directly into performance:
- Plating anodes: N4 anodes dissolve uniformly without generating Fe-rich anode sludge that roughens plated surfaces.
- Vacuum tube cathodes: The absence of volatile trace elements prevents cathode poisoning that reduces electron emission.
- Alkali handling: N4 retains pure nickel's legendary resistance to caustic soda and potash, with the added benefit that trace element leaching into the product stream is essentially eliminated.
Chemical Composition (wt.%)
| Element | N4 Max | Standard NI200 Max |
|---|---|---|
| Ni+Co | >= 99.9 | >= 99.0 |
| Fe | <= 0.04 | <= 0.40 |
| Cu | <= 0.015 | <= 0.25 |
| C | <= 0.01 | <= 0.15 |
| Si | <= 0.03 | <= 0.35 |
| Mn | <= 0.002 | <= 0.35 |
| S | <= 0.001 | <= 0.010 |
Mechanical & Physical Properties
| Property | Value |
|---|---|
| Tensile (Annealed) | >= 380 MPa |
| Elongation | >= 40% |
| Thermal Conductivity | ~80 W/m-K |
| Electrical Resistivity | ~0.075 micro-ohm-m |
| Magnetic | Ferromagnetic (Curie ~360C) |
Heat Treatment
Annealing: 650-800C (1200-1470F), air cool or water quench.
Applications
| Industry | Component |
|---|---|
| Electronics | Vacuum tube cathodes, transistor lead wires |
| Electroplating | Nickel anodes, anode baskets |
| Chemical | High-purity alkali equipment, catalyst support grids |
| Food & Pharma | Process vessels requiring FDA-compliant pure nickel |
FAQ
Q1: N4 vs NI200? N4 has 99.9% Ni vs 99.0% for NI200. Iron is 0.04% max vs 0.40%. N4 for high-purity; NI200 for general corrosion.
Q2: Price? $30-55/kg EXW depending on form. Contact sales@hangboalloy.com.
Q3: Forms? Round bars, plates, cold-rolled strip, wire. SGS inspection available.
Contact & Complete Product Range
| Channel | Details |
|---|---|
| Company | Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier |
| sales@hangboalloy.com | |
| WhatsApp (Lisa) | +86 13611656360 |
| Website | www.nickel-alloy.com |
Full Alloy Grades
Pure Nickel: NI200, NI201, N4, N5, N6 | Monel: 400, 401, 404, K-500, R-405 | Inconel: 600, 601, 617, 625, 690, 718, X-750, 725 | Incoloy: 800, 800H, 800HT, 825, 925, 926, A-286 | Hastelloy: C-276, C-22, C-2000, G-30, X, B-2, B-3, N | Nimonic: 75, 80A, 90, 95, 105, 115, 263 | Haynes: 25, 188, 230, 242, 282, 556 | Precision: 1J22, 1J46, 1J50, 1J79, 1J85, 3J21, 4J32, 4J36, 4J45 | High-Strength: 18Ni250, 18Ni300, AerMet100, PH13-8Mo
Product Forms
Bars(6-500mm) | Tubes(OD 6-610mm) | Plates(0.1-100mm) | Forgings | Welded Pipes | Fittings | Wire & Strip
SGS/BV/TUV inspection. Contact: sales@hangboalloy.com | www.nickel-alloy.com
