ALLOY-200/201(Nickel 200/201)

Corrosion Resistance
Chemical Composition
Mechanical properties
International Standard Comparision Chart Stock Form And Sizes
Round Bars
Hex Bars
Nuts And Washers
Spring Washer
Hex Bolt
Stud Bolt
Sourceable Materials


ALLOY200/201 is an unalloyed wrought nickel which have excellent resistance to many corrosive media from acid to alkaline.

  • excellent corrosion resistance in many alkaline media
  • good mechanical properties within a wide range of temperatures
  • magnetization decreasing continuously between -273 and 360°C (-458 and 680°F) and showing paramagnetism

Stock Form and Sizes

※ ◆1000㎜ ◎2000㎜ ▲3000㎜ ■3500㎜ ●4000㎜ ★2500㎜~3990㎜

Round BarsSpecification:ASTM B160/B564※ ASME SB160/SB564※※B564/SB564 Apply to Forged Bar Only Stock Specification: 200/201 Dual
size 1〜13
1.2 1.6 2 2.6 3 3.5 4 4.4 5 5.3 6 7.1 8 8.95 10 12 13
size 16〜50
16 18 19 20 22 24 25 28 30 32 35 36 38 40 42 45 50
size 55〜135
55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135
size 140〜300
140 145 150 155 160 165 170 180 190 200 210 220 230 250 280 300  
Hex barsSpecification:ASTM B160
10 13 14 17 19 21 22 24 26 27 30 32 36
Nuts and washersSpecification:Nuts JIS B1181 Class1 washers,JIS B1256 Normal Series Grade.A
M5 M6 M8 M10 M12 M16 M20

※Please enquire about grades and sizes not in stock.

Sourceable Ex-Stock Material for other Forms from Distributors World-Wide

Equivalent Round Bars Plates/Sheets Pipes/Tubes Welding rods
Min Max Min Max
Nickel200/201 9.52~190.5 0.1~50.8  

*○: Various sizes available in stock. △: Only limited sizes available in stock. ☆: Please contact us for more details.
※We can supply materials and products that comply with various standards including ASTM, ASME, AMS, and NACE standards. Please contact us for more details.

Corrosion resistance

Alloy 200 and Alloy 201 have excellent resistance to many corrosive media from acid to alkaline. They are most useful under reducing conditions but, where a passive oxide is formed, they may also be used in oxidizing conditions.
Their most significant property is extremely high resistance to caustic alkalies up to and including the molten state. The extra-low carbon content of Alloy 201 gives virtual mmunity to intergranular attack above about 315 °C ( 600 °F). The presence of chlorates must be kept to a minimum, as they accelerate the rate of attack.
The resistance of Alloy 200 and Alloy 201 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, Alloy 200 and Alloy 201 show good resistance, but severe attack occurs in oxidizing salt solutions. Both alloys are 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 (1020 °F).


Unalloyed wrought nickel combines excellent mechanical properties with good corrosion resistance. Above 300 °C (570 °F) 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 (570 °F).
  • • Industrial processes where sodium hydroxide is typically used, involve: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

Chemical composition

  Ni Fe C Mn Si Cu Mg Ti S
200 >99.0 <0.40 <0.15 <0.35 <0.1 <0.25     <0.01
201 >99.0 <0.40 <0.02 <0.35 <0.2 <0.25 <0.15 <0.1 <0.01

※The values in the table are for reference only and do not guarantee minimum or maximum values. For further information, please contact us.

Mechanical properties(Round Bar)

  Condition Yield Strength(Mpa) Tensile Strength(Mpa) Elongation(%) Hardness(HB)
ASTM Min Value Soft Annealed 105 380 40  
Typical Values at RT Hot worked 196 431 45 90
Typical Values at RT Cold worked 490 588 25 160
Typical Values at RT Soft Annealed 147 490 50 90

Above standard values and typical values of Round Bar.
Please contact us with any questions about reference or value of plate and pipe.
※Our stock is dual 200/201 material, above standard values and typical values of ALLOY 200.
※The values in the table are for reference only and do not guarantee minimum or maximum values. For further information, please contact us.

International Standard Comparison Chart

  Material Round Bars Plate/Sheets Pipe/Tube
Seamless Welded
B160 B162 B161/163 B725-730
ASME SB160 SB162 SB161-163  
JIS NW2200 NW2201 H4553 H4551 H4552  
DIN 2.4066 2.4068 17752 17750 17751 17751
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