2.4660 -N08020 – Alloy 20

2.4660 -N08020 – Alloy 202018-06-18T09:02:09+00:00

2.4660

  • N08020
  • Alloy 20

Alloy 20 is an iron-base, austenitic alloy with excellent corrosion resistance to a number of different media and proves to be useful in a number of
applications such as flue-gas desulfurization, chemical processing, food processing and storage as well as pharmaceutical applications to name a few. Applications are limited to a maximum temperature of 537°C per ASME. This Alloy was developed for maximum resistance to acid attack, specifically sulfuric acid and fresh water tanks; crude petroleum stills, process vessels and piping; boiler feedwater heaters and heat exchangers; and deaerating heaters.

Mechanical Properties

Tensile strength:550N/mm²
Yield strength 0,2% :240≥ N/mm²
Elongation:30≥ %
Hardness HB30:217≤ HB

Chemical Composition

Nickel

Ni

32-38% min

Carbon

C

0,07% max

Silicon

Si

1,00% max

Magnese

Mn

2,00% max

Sulphur

S

0,035% max

Copper

Cu

3-4% max

Molybdenum

Mo

2-3% max

Chromium

Cr

19-21% max

Heat Treatment

920-960°C followed by water quench.

Resistance to sulfuric acid is particularly exceptional but the alloy shows useful resistance in phosphoric acid, nitric acid as well as in chloride environments. Alloy 20 is an excellent option when chloride stress corrosion cracking is an issue and resists pitting and crevice corrosion.

can be welded by all the conventional methods. Proven welding processes are:

GTAW (TIG), GMAW (MIG), Plasma, PHW, SMAW.

Pulsed arc welding is the preferred technique.

Marking

All material will be marked as follow:

  • Manufacturer’s name
  • Material grade
  • Size
  • Heat Number

Certification

Material will be delivered with certificate EN 10204 3.1

products

Pipes, piping material

pipes

Flanges, piping material

flanges

Fittings, piping material

fittings

Plates, piping material

plates

Round Bar, piping material

bars

Forged Fittings, piping material

forged fittings