Nickel 200 and Nickel 201 /Nickel 205 are solid solution strengthened, commercially pure wrought materials with good mechanical properties over a wide range of temperatures and excellent resistance to many corrosives, in particular hydroxides. Nickel 201 was a modification of 200 to control carbon (.02 max) which keeps it from being embrittled by intergranular precipitates at temperatures of 600 to 1400 in many processes. Typically, the elemental restrictions of both, nickel 200 and nickel 201, are combined into one, dual-certified chemistry resulting in a single alloy with the desired characteristics of both alloys, Nickel 200/201.

Nickel 200 is normally limited to service at temperatures below 600. At higher temperatures Nickel 200 products can suffer from graphitization which can result in severely compromised properties. When operating temperatures are expected to exceed 600, carbon content becomes critical. The lower carbon content of Nickel 201 makes the material resistant to graphitization and therefore less subject to embrittlement. Nickel 200 & 201 &205 are approved for construction of pressure vessels and components under ASME Boiler and Pressure Vessel Code Section VIII, Division 1. Nickel 200 is approved for service up to 600 while Nickel 201 is approved for service up to 1230. Melting point is 2615-2635.

What are the characteristics of Nickel 200/201/205?

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

In what applications is Nickel 200/201 used?

Fod processing equipment 

Marine and offshore engineering 

Salt production 

Caustic handling equipment 

Manufacture and handling of sodium hydroxide, particularly at temperatures above 300�� F 

Reactors and vessels in which fluorine is generated and reacted with hydrocarbons

Nickel 200 (UNS N02200) Chemical Composition, %

Nickel 201 (UNS N02201) Chemical Composition, %

Nickel 205 (UNS N02205) Chemical Composition, %