ALLOY 20

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welding alloy 20 / chemical composition / plate / equivalent material / flanges / pipe / astm grade / mechanical propertiesAlloy 20 is an austenitic nickel-iron-chromium alloy with additions of copper and molybdenum.

The nickel content makes Alloy 20 resistant to chloride-ion stress-corrosion cracking.  Copper and molybdenum give resistance to reducing environments. The molybdenum content also provides good resistance to pitting and crevice corrosion.  The chromium gives resistance to oxidizing environments such as nitric acid.  The addition of niobium reduces the effect of carbide precipitation during welding, thus increasing the alloy's resistance to intergranular corrosion.

Alloy 20 has exceptional corrosion resistance in sulfuric acid environments, and is used in a range of applications involving this acid.  Other uses include the production of gasoline, solvents, explosives, inorganic and organic chemicals, pharmaceuticals, food and synthetic materials.  For these and other applications,Alloy 20 is readily fabricated to produce mixing tanks, heat exchangers, process piping, pickling equipment, pumps, valves, fasteners and fittings.

Chemical Analysis of CP Alloy 20

C
Ni
Mo
Co
Ir
M
Cr
Si
Su
Ti
Al
Pho
19.00-21.00
32.00-38.00
2.00-3.00
3.00-4.00
Bal.
2.00max
0.07max
1.00max
0.035max
   
0.045max


Specification:-

Sheet / Plate
 SB- B162 / B160
 Round Bar
 SB- B162 / B160
 Pipe
SB- B161 / B725
 Tube  
 Fittings  SB- B366
 Forgings  SB- B564

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