200/201

RA200/201 is commercially pure nickel with excellent resistance to many corrosive environments. Its outstanding corrosion property is resistant to hot concentrated alkali (except ammonium hydroxide). RA200-201 possesses good resistance to corrosion by dry chlorine, fluorine, hydrogen chloride and hydrogen fluoride up to moderately elevated temperatures. It is useful for maintaining product purity in the handling of substances ranging from foods, synthetic fibres and alkalies to fatty acids and soaps. The corrosion rate of RA200/201 outdoors varies with atmospheric conditions but is low. Sulphurous atmospheres are the most corrosive. Marine atmospheres are little, if any, more corrosive than suburban or rural atmospheres RA200/201 is highly resistant to corrosion by distilled water, natural waters (including those containing hydrogen sulphide or free carbon dioxide) and seawater. RA200/201 is ferromagnetic and has one of the largest magnetostrictive effects of commercially available materials. Both the thermal and electrical conductivities of RA200/201 are good, considerably higher than those of the stainless steels or nickel base alloys. Because of graphite precipitation after long exposure in the 800-1200°F temperature range, RA200 is not recommended for service above 600°F. The low carbon grade, RA201, is preferred for the higher temperature applications.

Chemistry

 NiMnCuSiCSFe
MIN 99.0 -- -- -- -- -- --
MAX -- 0.35 0.25 0.35 0.15 (0.02) 0.01 0.4

Specifications

ASME SB 160ASME SB 161ASME SB 162ASME SB 366ASME SB 564ASME SB 725ASME SB 730
ASTM A 480
ASTM B 160ASTM B 161ASTM B 162
ASTM B 366ASTM B 564
UNS N02200UNS N02201
W. Nr. 2.4066W. Nr. 2.4068

Inventory

200/201 Pipe, 200/201 Plate, 200/201 Sheet, 200/201 Tubing

Common Trade Names

Nickel 200/201, Nickel Alloy 200/201

Features

  • Excellent resistance to many corrosive environments
  • Preferred to resist dry chlorine, fluorine, hydrogen chloride or hydrogen fluoride gases at elevated temperatures
  • Good thermal and electrical conductivity
  • Good general corrosion resistance
  • Large magnetostrictive effect

Applications

  • Caustic manufacture and storage
  • Chemical shipping containers
  • Synthetic fiber production
  • Fluorine electrolysis
  • Food processing equipment
  • Magnetostrictive devices

Physical Properties

Density: 0.321 lb/inch3
Melting Range: 2615- 2635°F
Curie Point: 680°F
Specific Heat at 70°F: 0.109 Btu/lb °F

Temperature, °F 200 400 600 800 1000 1200
Coefficient* of Thermal Expansion, in/in°F x 10-6 7.4 7.7 8.0 8.3 8.5 8.7
Thermal Conductivity
Btu • ft/ft2 • hr • °F
38.8 35.4 32.5 32.5 33.8 35
Modulus of Elasticity, Dynamic psi x 106 75 113 164 204 228 248

* 70°F to indicated temperature.

Mechanical Properties

Minimum Specified Properties

  Nickel 200 Nickel 201
Ultimate Tensile Strength, ksi 55 50
0.2% Yield Strength, ksi 15 12
Elongation, % 40 40
Hardness MAX, Brinell 90 --