Definition of High performance nickel bar 4mm-150mm
High performance nickel bar 4mm-150mm are cylindrical bars composed primarily of nickel (industrial-grade Ni ≥ 99%, high-purity Ni ≥ 99.99%). They feature a face-centered cubic crystal structure, exhibit a silvery-white metallic luster at room temperature, and possess ferromagnetic properties.
Due to its outstanding corrosion resistance, excellent electrical and thermal conductivity, and superior workability, it is widely used in high-end industrial sectors such as chemical engineering, electronics, aerospace, and nuclear energy.
Basic Physical and Chemical Properties
- Appearance: Silver-white metallic with a lustrous finish; crystal structure is face-centered cubic.
- Density: Approximately 8.9 g/cm³.
- Melting point: Approximately 1455°C (slight variations exist across sources, generally ranging between 1450–1455°C).
- Electrical and Thermal Conductivity: Excellent among metals, with thermal conductivity reaching 60 W/(m·K), suitable for electrodes and heat-conducting components.
- Magnetic Properties: Ferromagnetic, with a Curie point around 360°C; loses magnetism above this temperature.
- Corrosion Resistance:
Exceptionally stable in alkaline environments, particularly resistant to concentrated alkalis (e.g., NaOH, KOH), making it a critical material in the alkali manufacturing industry.
Also performs well in neutral salt solutions, seawater, fatty acids, and similar media.
However, it exhibits poor corrosion resistance in oxidizing acids (e.g., nitric acid, sulfuric acid containing oxidizing agents).
Key Physical and Mechanical Properties
Ni200 Nickel content ≥99.6%, with impurities including Fe, Cu, Mn, Si, C, etc.;
Ni 201 features extremely low carbon content, suitable for high-temperature intergranular corrosion resistance; total impurities in high-purity nickel can be controlled at the 10 ppm level.
Physical Properties:
Density 8.90 g/cm³, melting point 1453°C; thermal conductivity approximately 90 W/(m·K), electrical conductivity approximately 14% IACS; ferromagnetic at room temperature, Curie temperature 358°C; linear expansion coefficient 13.3×10⁻⁶/°C;
Mechanical Properties (Annealed Condition)
| Material Grade |
Tensile strength |
Elongation |
Brinell hardness |
|---|---|---|---|
| Ni200) | ≥380 MPa | ≥40% | ≤70 HB |
| Ni201 | ≥370 MPa | ≥40% | ≤68 HB |
|
***Cold working can significantly increase strength (e.g., cold-drawn conditions can exceed 650 MPa), but reduces ductility; annealing can eliminate internal stresses and restore ductility. |
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Corrosion Resistance:
Exhibits exceptional corrosion resistance in strong alkalis (e.g., NaOH solutions, molten alkalis), outperforming most alloys; remains stable in neutral salts, dry atmospheres, and organic acids; shows limited resistance to non-oxidizing acids; susceptible to corrosion by strong oxidizing acids (concentrated nitric acid); forms a dense oxide film in air below 315°C, providing good oxidation resistance; performance degrades in sulfur-containing high-temperature environments.
Primary Application Areas of High performance nickel bar 4mm-150mm
1. Chemical Industry
Used to manufacture components resistant to strong alkali corrosion, such as reactor vessel linings, evaporator heating tubes, valves, and pump bodies.
2. Electronics and Vacuum Devices
Used to produce anodes, separators, electrode supports, and leads. Its low gas solubility makes it suitable for high-vacuum environments.
3. Aerospace and Energy
Used in high-temperature, high-reliability components such as aircraft engine fuel nozzles and nuclear reactor control rod guide tubes.
4. Medical Devices
Precision-grade nickel rods (diameter 0.8–50mm) for manufacturing implantable devices or diagnostic equipment components.
Selection and Processing Guidelines of High performance nickel bar 4mm-150mm
- Grade Selection: For high-temperature or welding applications, prioritize Ni201 (low-carbon, resistant to intergranular corrosion);
- For ambient-temperature strong alkali environments or general structural use, select Ni200;
- For electronics/semiconductor applications, use high-purity Ni270;
- Welding: TIG (GTAW) recommended using pure nickel filler wire (e.g., ERNi-1); Ni200 typically requires no post-weld heat treatment.
- Machining: Pure nickel exhibits high toughness and tendency to stick to tools; requires sharp cutting tools, low cutting speeds, and adequate cooling lubrication.
- Storage: Avoid humid or sulfur-containing environments to prevent surface oxidation and discoloration.
Products pictures showcase of High performance nickel bar 4mm-150mm
High performance nickel bar 4mm-150mm
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