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Alloy 20 / UNS N08020/ Plate, Sheet

Alloy 20 is a highly alloyed austenitic stainless steel developed primarily for use in the sulfuricacid related processes. Alloy 20 is used is a wide variety of applications from Sulfuric acid pickling tanks, racks and heating coil, Heat Exchangers, Process piping, Chemical and petroleum process equipment etc.

Product description:


Alloy 20, a nickel-iron-chromium-austenite alloy with added copper and molybdenum, exhibits exceptional resistance to acid attack, particularly sulfuric acid. It offers excellent corrosion resistance against chloride-containing chemicals like sulfuric acid, phosphoric acid, and nitric acid, including resistance to chloride stress corrosion cracking. The presence of niobium prevents sensitization and intergranular corrosion. Alloy 20 is widely used in various industries, including chemical, food, dye, pharmaceutical, and plastics. It finds applications in heat exchangers, mixing tanks, metal cleaning, pickling equipment, and pipes. With its excellent corrosion resistance, mechanical properties, and ease of manufacture, Alloy 20 is a preferred choice in demanding environments.

 


UNS: N08020

W. NR.: 2.4660

ASTM: B 463, A 240, B 464, B 473, B 366

ASME: SB 463, SA 240, SB 464, SB 473, SB 366

 

Product features:


  • Excellent general corrosion resistance to sulfuric acid.
  • Excellent resistance to chloride stress corrosion cracking.
  • Excellent mechanical properties and fabricability.
  • Minimal carbide precipitation during welding.
  • Excels in resisting corrosion to hot sulfuric acids.

 

Application field:


Production of plastics and synthetic fibers
Chemical and petroleum processing equipment
Hybrid tank
Heat exchanger
Process pipeline

 

Chemical Composition:


牌号
Grade
% Ni Cr Fe Mo C Mn Si S Cu P
Alloy 20 Min 32 19 Bal. 2 3
Max 38 21 3 0.07 2 1 0.03 4 0.03

 

Mechanical Properties:


抗拉强度
Tensile Strength
σb/MPa
屈服强度
Yield Strength
σp0.2/MPa
延伸率
Elongation
σ5 /%
600 320 35

 

Standards:


棒材
Bar
锻件
Forging
板(带)材
Sheet/Strip
线材
Wire
ASTM B473 ASTM B462 ASTM B463 ASTM B471

 

Form

Seamless Tube/Pipe
Sheet
Bar
Wire
Welded Tube/Pipe
Strip
Flanges
Fittings

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