VDM® Alloy 200

Steelun Steel Standards of VDM® Alloy 200:

Alternative and trade names
Nickel 99.2

UNS N02200

Equivalent standards of VDM® Alloy 200:

DIN EN 2.4066 – Ni99.2

Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Steelun Description of VDM® Alloy 200:

Nickel 99.2 is an unalloyed wrought nickel. It offers excellent corrosion resistance, good mechanical, magnetic and magnetostrictive properties and useful thermal and electrical conductivities. Nickel is characterized by: excellent corrosion resistance in many alkaline media, good mechanical properties within a wide range of temperatures, magnetization decreasing continuously between -273 and 360 °C and showing paramagnetism above the Curie point.

Chemical composition Steelun of VDM® Alloy 200:

Element Weight %  
Ni 99.0  
Fe 0.4 max
Mn 0.35 max
Cu 0.25  
C 0.15 max
Si 0.1 max
S 0.01 max

Steelun Properties of VDM® Alloy 200:

Electrical resistivity [ ρel ] 9E-8 Ω·m at 20 °C
General information
Density [ ρ ] 8.90 g/cm³
Curie temperature [ Tc ] 360.00 °C
Elastic modulus [ E ] 205.00 GPa at 20 °C
Elongation A5 [ A5 ] 44.00 % at 20 °C Typical mechanical property in the annealed condition
Tensile strength [ Rm ] 440.00 MPa at 20 °C Typical mechanical property in the annealed condition
Yield strength Rp0.2 [ Rp0.2 ] 150.00 MPa at 20 °C Typical mechanical property in the annealed condition
Yield strength Rp1.0 [ Rp1.0 ] 180.00 MPa at 20 °C Typical mechanical property in the annealed condition
Coefficient of thermal expansion [ α ] 1.33E-5 1/K at 100 °C
Melting point [ Tm ] 1435—1445 °C
Specific heat capacity [ cp ] 456.00 J/(kg·K) at 20 °C
Thermal conductivity [ λ ] 70.50 W/(m·K) at 20 °C

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.

Technological properties Steelun of VDM® Alloy 200:

Application areas
Unalloyed wrought nickel combines excellent mechanical properties with good corrosion resistance. Above 300 °C working temperature, the low-carbon version is generally used. The limited carbon content lowers mechanical property values and work-hardening rate but promotes ductility. Typical applications are: food production, such as handling of cooling brines, fatty acids and fruit juices (resistance to acid, alkaline and neutral salt solutions and to organic acids), vessels in which fluorine is generated and reacted with hydrocarbons (resistance to fluorine), storing and transportation of phenol (immunity from any form of attack ensures absolute product purity), manufacture and handling of sodium hydroxide, particularly at temperatures above 300 °C. Industrial processes where sodium hydroxide is typically used, involve: production of viscose rayon and manufacture of soap (general corrosion resistance and virtual immunity to intergranular attack above 315 °C), production of hydrochloric acid and chlorination of hydrocarbons such as benzene, methane and ethane (resistance at elevated temperatures to dry chlorine and hydrogen chloride), manufacture of vinyl chloride monomer (resistance to hydrogen chloride at elevated temperatures).
Corrosion properties
Nickel 99.2 has an excellent resistance to many corrosive media from acid to alkaline. It is most useful under reducing conditions but, where a passive oxide is formed, it may also be used in oxidizing conditions. Its most significant property is extremely high resistance to caustic alkalies up to and including the molten state. The resistance of Nickel 99.2 to mineral acids varies according to temperature and concentration and whether or not the solution is aerated. Corrosion resistance is better in deaerated acid. In acid, alkaline and neutral salt solutions, Nickel 99.2 shows good resistance, but severe attack occurs in oxidizing salt solutions. The alloy is resistant to all dry gases at room temperature. The low-carbon alloy can be used in dry chlorine and hydrogen chloride at temperatures up to 550 °C.
Nickel 99.2 should be machined in the heat-treated condition. As the alloy exhibits a high work-hardening rate only low cutting speeds should be used compared with low-alloyed standard austenitic stainless steels. Tools should be engaged at all times. An adequate depth of cut is important in order to cut below the previously formed work-hardened zone.
Nickel 99.2 has a face-centered-cubic structure between temperatures close to absolute zero and melting point.

Steelun Applications of VDM® Alloy 200:

Equipment for Chemical Industry,Food Industry Equipment,Industrial Machinery,Storage Equipment

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