Hangbo Alloy Group
Shanghai · Est. 2012
N02233 technical guide: nominal chemical composition, mechanical and physical properties, corrosion resistance, welding, product forms and ASTM standards...
Nickel 233 (UNS N02233) is a commercially pure nickel (high-temperature). High-purity Ti-bearing pure nickel. Tighter iron control than 205. 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 233 for a project.
Nickel 233 belongs to the commercially pure nickel (high-temperature) class of materials. It is high-purity ti-bearing pure nickel. It is tighter iron control than 205. It is pure-nickel caustic resistance + hot strength.
Nominal (wt%) composition of Nickel 233 (UNS N02233):
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | 99.0 min |
| Carbon (C) | ≤ 0.15 |
| Titanium (Ti) | 0.020 – 0.60 |
| Iron (Fe) | ≤ 0.10 |
| Manganese (Mn) | ≤ 0.30 |
| Magnesium (Mg) | ≤ 0.05 |
| Silicon (Si) | ≤ 0.10 |
| 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) | 430 MPa (62 ksi) |
| Yield Strength, 0.2% (Rp0.2) | 130 MPa (19 ksi) |
| Elongation in 50 mm | 42% |
| Hardness (Rockwell B) | 58 – 72 HRB |
| Property | Value |
|---|---|
| Service temperature | Up to 600 °C |
| Titanium for grain stability | 0.02 – 0.60 % Ti |
233 is a high-purity, titanium-bearing pure nickel similar to 205 but with tighter iron control, giving very good high-temperature strength and grain stability plus classic pure-nickel resistance to caustic alkalis and many salts.
Welded with ERNi-1 filler by GTAW/GMAW; titanium controls HAZ grain growth. Anneal after welding to restore softness.
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 |
233 is a high-purity, titanium-bearing pure nickel with tighter iron control than 205. The titanium gives high-temperature strength and grain stability, while it keeps pure-nickel resistance to caustic alkalis and salts.
Annealed: ≈ 430 MPa tensile, ≈ 130 MPa yield, 42 % elongation, 58–72 HRB, usable to about 600 °C.
Chemically close; 233 has tighter iron limits and is positioned for high-temperature pure-nickel service. Mechanical and corrosion behaviour are essentially the same family.
Yes, with ERNi-1 filler by GTAW/GMAW; titanium limits HAZ grain coarsening, and annealing restores ductility.
High-temperature pure-nickel components, caustic/salt equipment, furnace hardware and electronic/plating hardware.
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.