Nickel Alloy 20
Nickel alloy 20 is a lowcarbon, niobiumstabilized austenitic nickel/iron/chromium alloy with additions of molybdenum and copper. It exhibits exceptional corrosion resistance in chemical environments containing phosphoric acid, nitric acid, chlorides and sulfuric acid.
It also has good mechanical properties at both ambient and elevated temperatures.
Alloy 20 is an iron based, austenitic alloy with high nickel and chromium content. It has excellent corrosion resistance in chemical environments containing sulphuric acid and many other aggressive media.
The alloy is stabilized with niobium to resist intergranular corrosion. Alloy 20 may provide potential cost savings when carefully compared to higher nickel-based alloys, while out performing standard stainless steels.
Alloy 20 is used in a variety of industries, including chemical processing, petrochemical and refining, marine, pharmaceutical and food processing.
End use applications include storage tanks, mixing tanks, agitators, pump and valve parts, food processing equipment, fasteners and fittings.
Applications are limited to a maximum temperature of 1000°F per ASME. It is also important to determine if the necessary corrosion resistance can be achieved within the given environment.
- Sulfuric acid pickling tanks, racks and heating coils
- Phosphate coating drums and racks
- Heat exchangers
- Process equipment for manufacture of bullet-proof fibre, Kevlar
- Mechanical seals
- Process piping, Tanks, Pumps and valves
Alloy 20 has very good resistance to sulfuric acid. This alloy also shows suitable resistance in phosphoric acid, nitric acid and aqueous salt solutions.
Alloy 20 is an excellent option when chloride stress corrosion cracking is an issue, as it resists pitting and crevice corrosion.
Caution should be taken in chloride ion containing environments because the corrosion rate can increase significantly.
|Molybdenum||2.0 - 3.0|
|Density||8.05 g/cm3||0.291Metric lb/in3|
|Tensile strength*||620 MPa||89900psi|
|Yield Strength*||300 MPa||43500psi|
|Elongation at break*||41%||41%|
- Special Sections
- Flat Bar
- Round Bar
- Hollow Bar
- I Beam
- U Channel