UNS N02201, UNS N02200

Chemical composition

%	Ni	Fe	C	Mn	Si	S	Cu
min	99.0
max		0.40	0.15	0.35	0.35	0.010	0.25

Physical properties

Density	8.89 g/cm3
Melting range	1435-1446℃

Features

Nickel 200 is commercially pure wrought nickel. It is highly resistant to various reducing chemicals and can also be used in oxidizing conditions, where a passive oxide film forms. For example, it has unparalleled resistance to caustic alkalis. Nickel 200 is limited to service at temperatures below 315℃, as it suffers from graphitization at higher temperatures, which severely compromises its properties. In such cases, Nickel 201 is used instead. It has a high Curie temperature and good magnetostrictive properties, with thermal and electrical conductivities higher than other nickel alloys.

Applications

Used in applications where maintaining product purity is critical, such as handling caustic alkalis, foods, and synthetic fibers Electrical and electronic parts Aerospace and missile components Chemical storage and shipping tanks Chemical composition

%	Ni	Fe	C	Mn	Si	S	Cu
min	99.0
max		0.40	0.020	0.35	0.35	0.010	0.25

Physical properties

Density	8.89 g/cm3
Melting range	1435-1446℃

Features

Nickel 201 is the low-carbon version of Nickel 200. Because of its low carbon content, Nickel 201 is not subject to embrittlement by intergranularly precipitated carbon or graphite when exposed to temperatures of 315 to 760℃ for prolonged time if carbonaceous materials are not in contact with it. Therefore, it is a substitute for Nickel 200.

Applications

above 315℃. However it does suffer from intergranular embrittlement by sulfur compounds at temperatures above 315℃. Sodium peroxide can be used to change them to sulfates to counteract their effect. Electronic components Caustic evaporators Combustion boats and plater bars