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What Is Nickel 201?

Views: 7     Author: Wang     Publish Time: 2024-03-01      Origin: Site

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What is Nickel 201?

Nickel 201, also known as UNS N02201, is a commercially pure wrought nickel alloy that belongs to the family of nickel-based alloys. It is renowned for its remarkable resistance to various corrosive environments, which is attributed to its low carbon content. The alloy is a solid solution-strengthened material, making it highly suitable for applications requiring exceptional corrosion resistance and high thermal and electrical conductivity.

Nickel 201 is an alternative to its more common counterpart, Nickel 200, and is composed of 99.0% pure nickel with a maximum carbon content of 0.02%. This minute difference in carbon content significantly enhances the alloy’s ability to resist corrosion in acidic and alkaline environments. Nickel 201 has native properties to provide strong resistance to corrosion in acids and alkalis. It is especially useful under reducing conditions. The alloy has outstanding resistance to caustic alkalis, which includes its molten state. The alloy shows good resistance in acid, alkaline, and neutral salt solutions.

However, when Nickel 201 is in oxidizing salt solutions severe corrosion will occur. The Nickel 201 alloy is resistant to all dry gases at room temperature. In dry chlorine and hydrogen chloride, Nickel 201 alloy may be used in temperatures up to 550 °C. Its resistance to mineral acids varies according to temperature, concentration, and solution aeration. Its corrosion resistance displays better in de-aerated acid. Some of the Alloy 201 equivalent designations are the ASME SB-16 through SB163, the SAE AMS 5553, the DIN 17740, DIN 17750 through 17754 and BS 3072 through 3076. These all have their different compositions and specialties but could be used interchangeably for most of their mechanical properties.

The applications of Alloy UNS N02201 are not limited to the chemical and petrochemical industries. They are used in caustic evaporators, plater bars, electronic components of various applications and combustion boats. The alloy has a very high melting point at above 1435 degrees Celsius which makes it very much temperature resistant. The Alloy 201 Density is about the same as the Ni 200, at 8.89 grams per centimeter cube. The Alloy 201 suppliers sell all the different forms, shapes and types of the Alloy 201 material made products.

Features of Nickel 201

The mechanical properties of this alloy include high tensile strength, ductility, and excellent elongation. Its tensile strength ranges from 63 KSI to 110 KSI, and the yield strength is 25 KSI to 45 KSI. The elongation percentage is around 45% to 55%, depending on the heat treatment and fabrication process.

Nickel 201 Mechanical Properties

Product Form


Tensile (ksi)

.2% Yield (ksi)

Elongation (%)

Hardness (HRB)

Alloy 201 Rod & Bar

Hot Finished





Alloy 201 Bar & Rod

Cold Drawn/Annealed or Hot-Finished/Annealed





Alloy 201 Plate






Alloy 201 Sheet





70 max

Alloy 201 Tube & Pipe

Seamless Annealed




70 max

Nickel Alloy 201 has an excellent thermal conductivity of 41 W/mK and a low thermal expansion of 13.1 µm/m°C. It also has good electrical conductivity, with its resistance at 9.6 µΩ•cm.

Corrosion Resistance: Nickel Alloy 201 is highly resistant to various environments, including acids, alkalis, and seawater. It is impervious to corrosion and tarnishing by most organic and inorganic compounds. Due to its unique ability to resist corrosion, it is an excellent material for manufacturing protective coatings.

Heat Treatment: Nickel Alloy 201 can be annealed from 704°C to 871°C. The exact temperature depends on the manufacturing process and the desired properties of the final product. Annealing extends the material’s lifespan by relieving internal stresses that might develop during manufacturing.

Machining: Nickel Alloy 201 is relatively easy to machine and can tolerate high temperatures during manufacturing. It is recommended to use lubrication while machining to prevent seizing and any damage to the cutting tools.

Welding: Nickel Alloy 201 can be welded using all standard welding techniques, such as Gas Tungsten Arc Welding (GTAW), Gas Metal Arc Welding (GMAW), and Submerged Arc Welding (SAW). Using filler metals, including Nickel Alloy 61, Nickel Alloy 82, and Nickel Alloy 625, is recommended.

Application of Nickel 201

Chemical processing

Marine Engineering

Pollution Control

Pulp and Paper

Waste Treatment

Oil & Gas



Water Desalination

JN Alloy is a distributor and product manufacturer of stainless steel, duplex steel, and nickel.
Tel: +86 19339900211
Add: Stainless steel Market 289, Xinwu District , Wuxi, China
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