Hangbo Alloy Group
Shanghai · Est. 2012
N02205 technical guide: nominal chemical composition, mechanical and physical properties, corrosion resistance, welding, product forms and ASTM standards...
Nickel 205 (UNS N02205) is a commercially pure nickel (high-temperature). Titanium-added pure nickel for high temp. Pure-nickel caustic/salt corrosion resistance. 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 205 for a project.
Nickel 205 belongs to the commercially pure nickel (high-temperature) class of materials. It is titanium-added pure nickel for high temp. It is pure-nickel caustic/salt corrosion resistance. It is good grain stability when hot.
Nominal (wt%) composition of Nickel 205 (UNS N02205):
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | 99.0 min |
| Carbon (C) | ≤ 0.10 |
| Titanium (Ti) | 0.020 – 0.60 |
| Iron (Fe) | ≤ 0.20 |
| Manganese (Mn) | ≤ 0.35 |
| Magnesium (Mg) | ≤ 0.05 |
| Silicon (Si) | ≤ 0.20 |
| Copper (Cu) | ≤ 0.10 |
| Sulphur (S) | ≤ 0.008 |
| Cobalt (Co) | ≤ 0.10 |
Typical physical properties:
| Property | Value |
|---|---|
| Density | 8.90 g/cm³ |
| Melting Range | 1430 – 1450 °C |
| Thermal Expansion (20–1000 °C) | 14.0 µm/m·K |
| Thermal Conductivity (100 °C) | 65.0 W/m·K |
| Electrical Resistivity | 0.085 µΩ·m |
| Modulus of Elasticity | 207 GPa |
Typical room-temperature mechanical properties (annealed / specified condition unless noted):
| Property | Typical Value |
|---|---|
| Tensile Strength (Rm) | 450 MPa (65 ksi) |
| Yield Strength, 0.2% (Rp0.2) | 150 MPa (22 ksi) |
| Elongation in 50 mm | 40% |
| Hardness (Rockwell B) | 60 – 75 HRB |
| Property | Value |
|---|---|
| Service temperature | Up to 600 °C |
| Titanium-added for high-temp strength | 0.02 – 0.60 % Ti |
205 is a titanium-bearing pure nickel that gains strength and grain stability at elevated temperature while keeping pure-nickel corrosion resistance to caustic alkalis, salts and many organic media. The titanium controls grain growth during high-temperature exposure.
Welded with ERNi-1 filler by GTAW/GMAW; titanium helps the HAZ resist grain coarsening. Annealing after welding restores softness and 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 |
Standards & References. Specifications cited on this page; confirm current revisions with the issuing body.
General references: Nickel Institute · AMPP (corrosion) · SAE International · ASTM International
205 is a titanium-bearing commercially pure nickel. The titanium (0.02–0.60 %) improves strength and grain stability at high temperature while preserving pure-nickel corrosion resistance to caustic alkalis, salts and many organic media.
Annealed: ≈ 450 MPa tensile, ≈ 150 MPa yield, 40 % elongation, 60–75 HRB, serviceable to about 600 °C.
205 adds titanium for grain stability and strength at temperature; 200 is the baseline pure-nickel grade. Both share the same caustic/corrosion profile.
Yes, with ERNi-1 filler by GTAW/GMAW; titanium limits HAZ grain growth, and post-weld annealing restores ductility.
High-temperature pure-nickel hardware, caustic/salt equipment, furnace components and thermal-management/electronic parts.
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.