Materials

Nickel 200 (UNS N02200)

• Material: Commercially pure wrought nickel (≥99.6% Ni). Very low carbon content ensures resistance to embrittlement.

• Mechanical Properties:

  • Moderate strength compared to alloyed nickel grades (yield strength ~15–20 ksi annealed).

  • Excellent toughness and ductility, even at cryogenic temperatures.

  • Retains useful strength up to ~600°F (315°C); higher temperatures may cause graphitization.

• Corrosion Resistance:

  • Outstanding resistance to many reducing chemicals, caustic alkalies, neutral salts, and dry fluorine.

  • Not recommended in strong oxidizing environments (e.g., nitric acid).

  • Performs very well in caustic soda service, one of its primary uses.

• Manufacturing Considerations:

  • Excellent workability: easily formed, machined, and welded.

  • Cold-working increases strength (Nickel 201, the low-carbon modification, is used where elevated temperature resistance is needed).

  • Annealed condition often chosen for machining and fastener fabrication.

• Applications in Fasteners & Components:

  • Chemical processing equipment fasteners exposed to caustics or neutral salt environments.

  • Electronics and electrical components due to high thermal and electrical conductivity.

  • Marine hardware in mildly aggressive seawater/brine (though Monel alloys are usually preferred for more demanding marine service).

  • Food processing equipment where resistance to neutral/alkaline environments is required.