RAYCHIN LIMITED

Nickel 200 Washers – Design & Configurations

Critical Applications of Nickel 200 Washers

International Standards & Global Designations – Nickel 200 Washers

RAYCHIN LIMITED manufactures nickel 200 washers from vacuum arc melted (VAR) material conforming to the most widely used national and international specifications. All material is traceable to the mill.

Chemical Composition (Weight %) – Nickel 200 (UNS N02200)

Our nickel 200 washers are produced from vacuum arc melted (VAR) material conforming to the following limits per ASTM B160 and industry standards.

Nickel 200 (UNS N02200) – Minimum 99.0% Nickel

Metallurgical note: Nickel 200 is a commercially pure, solid-solution wrought nickel alloy. It has a face-centered cubic (FCC) crystal structure that remains stable from cryogenic temperatures up to its melting point, providing excellent ductility and fabricability. The alloy exhibits ferromagnetic properties with a Curie temperature of approximately 360°C (680°F). Nickel 200 is suitable for continuous service up to 315°C (600°F); for applications above this temperature, Nickel 201 (low carbon version) is recommended to avoid graphitization and embrittlement.

Complete Mechanical & Physical Properties – Nickel 200 (MPa / ksi)

Nickel 200 washers are supplied in various conditions (annealed, cold worked) per ASTM B160/B162. Data represent typical values based on industry standards.

Mechanical Properties – Nickel 200 (Annealed Condition – Typical for Washers)

Mechanical Properties – Nickel 200 (Cold Worked / Spring Temper)

Physical Properties – Nickel 200

High‑Temperature Performance of Nickel 200 Washers

Nickel 200 retains useful mechanical properties at elevated temperatures up to 315°C (600°F) and is suitable for continuous service in this range. The alloy maintains excellent ductility from cryogenic temperatures (-269°C) up to its maximum service temperature, with no ductile-to-brittle transition. At elevated temperatures, Nickel 200 exhibits good oxidation resistance and retains approximately 50% of its room temperature strength at 315°C. For applications above 315°C, Nickel 201 (low carbon version) is recommended to prevent graphitization and embrittlement. Spring washers can be heat treated to maintain elastic properties up to 315°C.

Elevated Temperature Capabilities

Exceptional Corrosion Resistance of Nickel 200 Washers

Nickel 200 offers outstanding corrosion resistance across a wide range of aggressive environments, making it suitable for the most demanding applications in chemical processing, marine, and power generation industries.

• Caustic Alkalis: Outstanding resistance to sodium hydroxide (caustic soda) and potassium hydroxide in all concentrations up to and including molten state. Nickel 200 is the preferred material for caustic evaporators and handling equipment.
• Seawater Corrosion: Excellent resistance to ordinary seawater corrosion, making it ideal for onshore and offshore marine applications, including desalination systems and marine fittings.
• Neutral and Alkaline Salts: Highly resistant to most neutral and alkaline salt solutions, including chlorides, sulfates, and nitrates.
• Acid Resistance: Good resistance to de-aerated mineral acids. Most useful under reducing conditions. Resists hydrofluoric acid and organic acids in the absence of oxidizing agents.
• High Temperature Water: Excellent corrosion resistance in high-temperature water and steam environments up to 315°C.
• Dry Gases: Resistant to dry chlorine, fluorine, hydrogen chloride and hydrogen fluoride up to moderately elevated temperatures (550°C).
• Food and Organic Materials: Non-reactive with organic compounds, making it ideal for food processing and pharmaceutical equipment where product purity must be maintained.
• Atmospheric Corrosion: Corrosion rate outdoors is low, though sulphurous atmospheres are the most corrosive. Marine atmospheres are little more corrosive than suburban or rural atmospheres.
• Limitations: Not suitable for oxidizing salt solutions, nitric acid, or oxidizing acid environments where rapid attack may occur.
• Bimetallic Corrosion: Can be safely connected to stainless steels, titanium alloys, and copper alloys with appropriate precautions. Avoid direct contact with aluminum, zinc, and carbon steel without proper insulation.

Manufacturing Standards – Nickel 200 Washers

All nickel 200 washers are manufactured and tested to meet the following standards:

We offer surface finishes: plain (as-machined/stamped), chemical cleaned, ground, polished. Silver plating per AMS 2410 available for anti‑seize. Cleanroom wash and cleanroom packaging available for pharmaceutical, food processing, and semiconductor applications – batch cleanroom packing provided for orders containing multiple items of the same size. Full traceability and destructive/non‑destructive testing available (UT, PMI, MPI). ISO 9001, AS9100D, ISO 13485 certified. ISO 14001 and PED certified company.