Nippon Yakin Kogyo NASNi201 Corrosion Resistant Pure Nickel

Manufacturer: Nippon Yakin Kogyo Co., Ltd
Model : NASNi201

NASNi201 (UNS N02201)
High Corrosion Resistant Pure Nickel

Pure Nickel (NASNi201) offers excellent corrosion resistance against caustic soda, chlorine gas, etc. In particular, it is used as a material for caustic soda manufacturing equipment by diaphragm electrolysis method. Nippon Yakin supplies this product in plate, sheet, and strip form.

Chemical Composition99Ni
Product shape

Coil

Sheet

Plate

WorkabilityBecause the work hardenability of Pure Nickel is low, it is suitable for severe cold working by methods such as spinning and coining.
WeldabilityPossible welding methods include shielded metal arc welding, TIG, MIG, and resistance welding. ENi-1 welding consumable should be used for TIG and MIG welding.

 

Grade/Standard

Nippon Yakin GradeJIS G 4902ASTM B162EN
NASNi201NW2201UNS N022012.4068

Chemical Composition

SpecificationCSiMnSNiFeCu
Specification (NW2201)≦0.020≦0.35≦0.35≦0.010≧99.00≦0.40≦0.25
Specification (UNS N02201)≦0.02≦0.35≦0.35≦0.01≧99.00≦0.40≦0.25

Physical Properties
Density[g/cm³]8.88
Specific heat[J/kg·K]456
Electrical resistivity[µΩ·cm]9.2
Thermal conductivity[W/m·K]72.7
Average coefficient of thermal expansion[10⁻⁶/°C]25~100°C: 12.9
25~200°C: 13.6
25~300°C: 14.2
Young’s modulus[MPa]21.1 × 10⁴
Melting range[°C]1433~1444

Mechanical Properties

Mechanical Properties at Room Temperature

Thickness [mm]Tensile strength [MPa]0.2% Proof stress [MPa]Elongation [%]
Specification (NW2201) Annealed≦1.2≧345≧80≧30
Specification (NW2201) Annealed≦1.2~2.7≧345≧80≧35
Specification (NW2201) Annealed≧2.7≧345≧80≧40
Specification (UNS N02201) [Cold-Rolled Sheet]≧345≧80≧40
Example: Cold-rolled sheet0.641523143

Corrosion Resistance

Alkali Resistance

NASNi201 provides extremely high corrosion resistance against alkalis.

AlloyCorrosion rate in boiling sodium hydroxide solution (mm/y)20%40%60%
SUS3040.012.7713.30
NAS64<0.010.515.79
NAS185N<0.010.512.36
NASNW22<0.010.030.06
NASNi201<0.010.020.03

Test time: 24h

Acid Resistance

Corrosion rate in sulfuric acid at 80°C (mm/y)
Alloy5%10%20%40%60%80%
SUS3041.9314.59195.21347231.8151.4
NAS64<0.010.021.07191.9105460.72
NAS185N0.020.041.322.893.204.78
NASNW220.010.020.020.040.470.34
NASNi2011.011.151.863.8313.700.79

Test time: 24h

Corrosion rate in hydrochloric acid at 80°C (mm/y)
Alloy0.10%1%2%3%
SUS3040.022.427.1618.99
NAS640.0112.9430.51
NAS185N0.024.27.21
NASNW220.030.020.04
NASNi2010.997.2813.3815.91

Test time: 24h

(Reference)
AlloyJISUNS No.Chemical Composition
SUS304SUS304S3040018Cr-8Ni
NAS64S32506S3250625Cr-6.5Ni-3.3Mo-0.17N
NAS185NSUS312LS3125420Cr-18Ni-6Mo-0.8Cu-0.2N
NASNW22NW6022N0602257Ni-21Cr-14Mo-3W-4Fe
NASNi201NW2201N0220199Ni

Workability

Because the work hardenability of Pure Nickel is low, it is suitable for severe cold working by methods such as spinning and coining.

Weldability

Possible welding methods include shielded metal arc welding, TIG, MIG, and resistance welding. ENi-1 welding consumable should be used for TIG and MIG welding.

Heat Treatment

Heat treatment of NASNi201 is normally performed at the temperature range from 760 to 1050°C, followed by being quenched in water or rapidly cooled by other means.

Pickling

It should be noted that descaling of NASNi201 is somewhat difficult in comparison with Type 304.

Applications

  • Caustic soda manufacturing plant
  • Terminal applications
  • Coins

 

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