Hangbo Alloy Group
Shanghai · Est. 2012
N02270 technical guide: nominal chemical composition, mechanical and physical properties, corrosion resistance, welding, product forms and ASTM standards...
Nickel 270 (UNS N02270) is a commercially pure nickel (high-purity). 99 % pure nickel – highest permeability. Best thermal/electrical conductivity of Ni grades. This guide covers its nominal chemical composition, typical mechanical and physical properties, corrosion behaviour, welding, common applications, available product forms and the ASTM standards that apply — everything a specifier needs to evaluate Nickel 270 for a project.
Nickel 270 belongs to the commercially pure nickel (high-purity) class of materials. It is 99 % pure nickel – highest permeability. It is best thermal/electrical conductivity of ni grades. It is excellent caustic alkali resistance.
Nominal (wt%) composition of Nickel 270 (UNS N02270):
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | 99.0 min |
| Carbon (C) | ≤ 0.02 |
| Iron (Fe) | ≤ 0.05 |
| Manganese (Mn) | ≤ 0.001 |
| Magnesium (Mg) | ≤ 0.01 |
| Silicon (Si) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.10 |
| Sulphur (S) | ≤ 0.005 |
| Cobalt (Co) | ≤ 0.05 |
Typical physical properties:
| Property | Value |
|---|---|
| Density | 8.90 g/cm³ |
| Melting Range | 1430 – 1450 °C |
| Thermal Expansion (20–300 °C) | 13.0 µm/m·K |
| Thermal Conductivity (100 °C) | 70.0 W/m·K |
| Electrical Resistivity | 0.075 µΩ·m |
| Modulus of Elasticity | 207 GPa |
Typical room-temperature mechanical properties (annealed / specified condition unless noted):
| Property | Typical Value |
|---|---|
| Tensile Strength (Rm) | 400 MPa (58 ksi) |
| Yield Strength, 0.2% (Rp0.2) | 100 MPa (15 ksi) |
| Elongation in 50 mm | 45% |
| Hardness (Rockwell B) | 55 – 70 HRB |
| Property | Value |
|---|---|
| Magnetic permeability | High (ferromagnetic) |
| Service temperature | Cryogenic to ≈ 315 °C |
270 is a high-purity nickel with very low carbon, iron and cobalt. The exceptional purity gives it the highest magnetic permeability and best thermal/electrical properties of the nickel grades, plus excellent resistance to caustic alkalis and many salts. It is the grade for magnetic and electronic applications.
Welded with pure nickel fillers (ERNi-1) by GTAW/GMAW; the low impurity content means minimal grain-growth issues. Keep heat input moderate; annealing restores ductility.
The grade is supplied to the following common specifications:
| Standard | Product Form / Scope |
|---|---|
| ASTM B160 | Bar & rod |
| ASTM B162 | Plate, sheet & strip |
| ASTM B161 | Seamless pipe & tube |
270 is a high-purity (≥ 99 % Ni) commercially pure nickel with very low carbon, iron and cobalt. The purity gives it the highest magnetic permeability and best thermal/electrical conductivity of the nickel grades, plus excellent caustic-alkali resistance.
Annealed: ≈ 400 MPa tensile, ≈ 100 MPa yield, 45 % elongation, 55–70 HRB. Being high-purity, it is relatively soft and ductile.
Magnetic and electromagnetic components, cathodes and plating hardware, high-purity caustic handling, electronic/semiconductor parts and cryogenic low-coercivity components.
Yes, with pure-nickel ERNi-1 filler by GTAW/GMAW; low impurities minimise grain-growth problems. Annealing restores ductility.
Both are pure nickel; 270 is the higher-purity, lower-carbon, low-cobalt grade chosen for magnetic/electronic properties, while 200 is the general engineering pure-nickel grade.
Bar/rod ASTM B160, plate/sheet/strip ASTM B162, seamless pipe/tube ASTM B161.
As a dedicated nickel alloy manufacturer serving chemical processing, power generation, aerospace sectors, Hangbo Alloy Group supplies the grades discussed here across all standard product forms with full ASTM/ASME documentation and EN 10204 3.1 certification. Our material is specified for applications where corrosion resistance, high-temperature strength, and traceable quality are non-negotiable. See our production & testing facilities for more on how every heat is verified. Contact us for a quote on this grade in your required product form.