Nickel 200

Titanium

Nickel

Overview

Grades & Materials

Pure Nickel

Nickel 200

Nickel 201

Nickel–Chromium Alloys

Nickel–Molybdenum Alloys

Nickel–Chromium–Molybdenum Alloys

Nickel–Iron Alloys

Applications

Products

Standards & Quality

Technical Knowledge

Selection Guide

Stainless

Carbon

Alloy

Copper, Brass and Bronze

Nickel 200

Nickel 200 is a commercially pure nickel alloy with a minimum nickel content of approximately 99%.
It is widely recognized for its excellent resistance to alkaline and reducing environments, stable mechanical properties, and outstanding ductility.

Within the nickel material system, Nickel 200 plays a role comparable to Titanium Grade 2—not designed for extreme strength, but highly valued for chemical reliability, cleanliness, and predictable long-term performance in the correct service conditions.

Chemical Characteristics

Nickel 200 is characterized by:

  • Very high nickel content

  • Extremely low alloying additions

  • A stable face-centered cubic (FCC) crystal structure

This metallurgical structure provides uniform mechanical behavior, excellent formability, and consistent corrosion resistance across a wide temperature range.

Corrosion Resistance Performance

Nickel 200 demonstrates outstanding corrosion resistance in alkaline and neutral environments, particularly where stainless steels may suffer rapid attack.

Excellent Resistance In:

  • Sodium hydroxide (NaOH) and caustic alkalis

  • Neutral salts

  • Reducing chemical environments

  • Dry gases at moderate temperatures

Limitations:

  • Not recommended for strong oxidizing acids

  • Limited resistance in high-chloride oxidizing environments

  • Not suitable for high-temperature oxidation service

Proper material selection should always be based on actual operating chemistry, temperature, and pressure.

Mechanical Properties (Typical)

Nickel 200 offers moderate strength combined with excellent ductility:

  • High elongation

  • Good impact toughness

  • Stable mechanical behavior at low temperatures

While it is not a high-strength alloy, Nickel 200 performs reliably in applications where corrosion resistance and formability are more critical than mechanical load capacity.

Typical Applications

Nickel 200 is commonly used in industries where alkaline corrosion resistance and material purity are key requirements.

Common Applications Include:

  • Caustic soda production and handling systems

  • Chemical processing equipment

  • Heat exchangers operating in alkaline service

  • Food and pharmaceutical processing equipment

  • Low-temperature and cryogenic components

In many chemical plants, Nickel 200 provides a cost-effective and proven solution when carbon steel and stainless steel are unsuitable.

Product Forms Available

Nickel 200 can be supplied in a wide range of semi-finished and finished forms:

  • Seamless tubes

  • Pipes

  • Plates and sheets

  • Bars and rods

  • Forgings and tube sheets

For heat exchanger and process equipment, seamless Nickel 200 tubes are especially valued for:

  • Uniform wall thickness

  • Consistent pressure performance

  • Reliable corrosion behavior

Manufacturing & Processing

Nickel 200 materials are typically produced through:

  • Hot working

  • Cold working

  • Solution annealing (as required)

The alloy exhibits excellent machinability and weldability, making it suitable for complex fabrication and forming processes.

Standards & Specifications

Nickel 200 is commonly manufactured and supplied in accordance with international standards, including:

  • ASTM material specifications

  • ASME pressure equipment requirements

  • EN standards (where applicable)

Typical Inspection & Testing:

  • Chemical composition analysis

  • Mechanical property testing

  • Dimensional inspection

  • Eddy current or ultrasonic testing (for tubes)

  • PMI verification

Full material traceability and Mill Test Certificates (MTC) are typically provided.

Nickel 200 vs Nickel 201

While Nickel 200 and Nickel 201 share similar corrosion resistance, the key difference lies in carbon content:

  • Nickel 200: Suitable for most applications below approximately 315 °C

  • Nickel 201: Low-carbon version, preferred for higher-temperature service to avoid graphitization

Material selection should consider operating temperature and service duration.

When to Choose Nickel 200

Nickel 200 is an excellent choice when:

  • The service environment is alkaline or reducing

  • High material purity is required

  • Good formability and weldability are needed

  • Long-term corrosion stability is more important than high strength

It is not recommended when:

  • Strong oxidizing acids are present

  • Severe chloride-induced corrosion is expected

  • High-temperature oxidation resistance is required