Alloy 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.
Regent Steel & Engg Co. is one of the quality suppliers, distributors, manufacturers and exporters of alloy 20 in various forms.
Available forms are alloy 20 pipe, alloy 20 tube, alloy 20 seamless tube, alloy 20 welded tube, alloy 20 round bars, alloy 20 coil, alloy 20 wire, alloy 20 sheet, alloy 20 plate, alloy 20 forgings, alloy 20 fittings, alloy 20 fasteners, alloy 20 flanges.
Chemical Analysis of CP Alloy 20
C Ni Mo Co Ir M Cr Si Su 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
Sheet / Plate SB- B162 / B160 Round Bar SB- B162 / B160 Pipe SB- B161 / B725 Tube Fittings SB- B366 Forgings SB- B564
Form Tensile Min. Yield Min. (.2% offset) Elongation Min. Reduction of Area Min. Bar (hot or cold finished) 80 ksi 35 ksi 30% 50%Sheet/Plate80 ksi35 ksi30%-