UNS N08020 (Alloy 20)

Description

Special properties:

Alloy 20(UNS N08020) /Incoloy20/2.4660/nicr20cumo/Nicrofer3620NB is an iron-based austenitic alloy developed to resist sulfuric acid corrosion. It has excellent resistance to sulfuric acid corrosion, phosphoric acid, nitric acid and chloride environments, chloride stress corrosion, pitting corrosion and crevice corrosion. Thus, Alloy 20 is also known as a corrosion-resistant alloy; it has a wide range of applications: chemical, food, pharmaceutical, power production and plastic industries. To resist pitting and chloride corrosion, stress corrosion cracking problems, etc., it is often necessary to use alloy 20.

 Alloy 20 Chemical composition:

	C	Si	Mn	P	S	Cr	Ni	Mo	Cu	Fe	Nb
Min	•	•	•	•	•	19	32	2	3	Rest	•
Max	0.07	1	2	0.045	0.035	21	38	3	4	Rest	1

Alloy 20 Mechanical Properties:

Density, g/cm³	8.08
Melting range, °C	1357 – 1430

 Alloy 20 Physical properties:

Material	Tensile Strength MPa	Yield Strength (0.2% Offset) MPa	Elongation (%)
Alloy 20	620	300	41

Alloy 20 ASTM Specifications：

Pipe Smls	Pipe Welded	Tube Smls	Tube Welded	Sheet/Plate	Bar	Forging	Fitting
B729	B464	B729	B468	B463	B473	B462	B366

Alloy 20 (UNS N08020) /Incoloy20/2.4660/nicr20cumo/Nicrofer3620NB exhibits excellent corrosion resistance in chemical environments that contain sulphuric acid, chlorides, phosphoric acid and nitric acid. It is easy to fabricate this alloy to form mixing tanks, heat exchangers, pickling equipment etc. The standard forms in which this alloy is available are round, flats, pipe, tube, strip and wire.

Alloy 20 Applications

Alloy 020 is used in the following applications:

• Produce mixing tanks, heat exchangers, valves, fittings and fasteners

• Production of gasoline, solvents, explosives and organic chemicals

• Pharmaceuticals and food industry.

• Production of plastics and synthetic fibers

• Chemical and petroleum processing equipment

• Mixing tanks

• Heat exchangers

• Process piping