Nickel 200 and Nickel 201 are commercially pure, solid solution strengthened wrought materials that offer good mechanical properties across a wide temperature range and exceptional resistance to various corrosive environments, particularly hydroxides. Nickel 201 is a modified version of Nickel 200, designed to reduce carbon content (with a maximum of 0.02%), preventing embrittlement caused by intergranular precipitates when exposed to temperatures between 600°F and 1400°F in many processes. In most cases, the elemental specifications of both Nickel 200 and Nickel 201 are combined into a single dual-certified alloy, known as Nickel 200/201, which offers the desired properties of both materials.

Characteristics of Nickel 200/201

• Highly resistant to various reducing chemicals
• Excellent resistance to caustic alkalies
• High electrical conductivity
• Excellent corrosion resistance to distilled and natural waters
• Resistance to neutral and alkaline salt solutions
• Excellent resistance to dry fluorine
• Widely used to handle caustic soda
• Good thermal, electrical, and magnetostrictive properties
• Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations

Nickel 200 (UNS N02200) Chemical Composition, %

Ni	Fe	Cu	C	Mn	S	Si
99.0 min	0.40 max	0.25 max	0.15 max	0.35 max	0.01 max	0.35 max

Nickel 201 (UNS N02201) Chemical Composition, %

Ni	Fe	Cu	C	Mn	S	Si
99.0 min	0.40 max	0.25 max	0.02 max	0.35 max	0.01 max	0.35 max

Applications of Nickel 200/201:

• Production and treatment of caustic soda
• Production of synthetic fibers and soaps
• Food manufacturing such as handling of cooling brine, fatty acids and fruit juices due   to   the material’s resistance against acids
• Marine and offshore engineering
• Alkalis and neutral salt solutions and against organic acids
• Tanks in which fluorine is produced and where it reacts with hydrocarbon (CFC) due to the material’s resistance against fluorine
• Production of hydrogen chloride and chlorination of hydrocarbons such as benzene, methane and ethane
• Production of vinyl chloride monomer due to the material’s resistance against dry chlorine gas and hydrogen chloride in increased temperatures
• Electrical and electronic components
• Electrode contacts and current conductors in batteries
• Current conductors in alkali fuels
• Storage and transport of phenol

Nickel 200/201 can be readily hot-formed to practically any shape. Proper temperature during deformation is the most important factor in achieving hot malleability. The recommended temperature range for hot forming is 1200° to 2250°F (650° to 1230°C). All heavy forging should be done above 1600°F (870°C); the metal stiffens rapidly below this temperature. Light forging below 1200°F (650°C), however, will produce higher mechanical properties. Laboratory experiments on forged discs for ring applications have indicated that tensile properties at 1200°F (650°C) can be increased by upsetting the material 50% at 1200°F (650°C). The best temperature range for hot bending is 1600° to 2250°F (870° to 1230°C). Nickel 200/201 tends to flow under pressure of the tool cutting edge and form long stringy chips. To avoid a built-up edge, tools should be ground with very high positive rake angles; 40° to 45° rake angles have been used in some instances. High-speed-steel or cast-alloy tools should be used. Chip action is substantially better with material in the harder tempers, so that cold-drawn rod in the as-drawn or stress-relieved temper will offer an improvement over annealed material.

Nickel 200/201 ASTM Specifications:

Pipe Smls	Pipe Welded	Tube Smls	Tube Welded	Sheet / Plate	Bar	Fitting
B161	B622	B161	B622	B162	B160	B163

Welding Wire Designations:
AWS A5.14 – ERNi1 (Nickel Ti)
AWS A5.14 – Nickel Wire (Pure Nickel Wire)

 

Mechanical Properties of Nickel 200/201:
Typical Room Temperature Tensile Properties of Annealed Material

Product Form	Tensile Min. (ksi)	0.2% Yield Min. (ksi)	Elongation Min
Rod & Bar	110.0	52.6	62
Sheet/Plate	107.4	50.3	67
Welded Pipe & Tube	115.5	54.6	60
Seamless Pipe & Tube	105.4	45.4	70