Made of pure nickel wires, the nickel woven wire cloth is very malleable and ductile among all wire mesh products.
There are two types of commonly used nickel mesh which are Ni200 mesh and Ni201 mesh. Both options are pure nickel wire meshes. In China, Ni201 has an equivalent grade of N4 and Ni200 has an equivalent of N6. Also, they have a UNS equivalent of UNS.N02200 and UNS.N02201 respectively.
The only difference between these two grades is the content of carbon elements.
Ni201 material has a relatively lower carbon content which means Ni201 filter mesh is purer than Ni200 filter mesh products.
Nickel wire mesh and wire cloth products are of great corrosion resistance, a high degree of electrical conductivity, and a very low electrical resistivity.

Advantages of Nickel 200 Wire Screen (UNS N02200)

Nickel 200 is an alloy that contains 99.6% pure nickel and may be utilized in any environment with temperatures lower than 600 degrees Fahrenheit. It has a very strong resistance to corrosion brought on by both acidic and basic salt solutions. Additionally, nickel alloy 200 exhibits low rates of corrosion in water that has been neutralized or distilled. This nickel alloy is capable of being cold or hot shaped into any shape. Additional advantages consist of the following:
-Excellent mechanical characteristics
-High conductivity both thermal and electrical in nature
-A low percentage of gases
-Very little vapor pressure
-Magnetic characteristics

Advantages of Nickel 201 Alloy (UNS N02201)
Nickel 201 alloy is a commercially pure wrought alloy with quite similar properties to nickel 200 alloy. 
However, nickel 201 alloy has a reduction in carbon concentration in order to prevent embrittlement caused by intergranular carbon when the temperature is elevated. -Excellent resistance to caustic alkalis in all states, even the molten one.
-Good resistance to acids and alkalis and works best in reducing circumstances.
-Excellent caustic alkali resistance, including molten.
-Good resistance to acid, alkaline, and neutral salt solutions, but oxidizing salt solutions attack severely.
-Resistant to all dry gases at ambient temperature including dry chlorine and hydrogen chloride at 550C.
-Temperature, concentration, and aeration affect mineral acid resistance. 
-Chlorates are virtually impervious to intergranular assault above 315C.

Chemical Composition of Nickel 200 and Nickel 201 Woven Wire Screens.

Physical Properties of Nickel 200 and 201 Alloy Wire Mesh

Tensile Properties of Pure Nickel Alloy.

Regular Specification Table of plain weave and twill weave nickel wire cloth

Regular specification table of Plain Dutch Weave Pure Nickel Wire Mesh