2.4642 – N06690 – Incoloy 690

2.4642 – N06690 – Incoloy 6902018-06-18T09:01:36+00:00

2.4642

  • N06690
  • Incoloy 690

INCONEL alloy 690 is a high-chromium nickel alloy which is particularlysuitable for use in oxidising media. Good mechanical properties at room temperature and high temperature, paired with high ductility. Typical applications are: treatment of radioactive waste,components in boilers and steam generators in pressurised water reactors,production of alkali metal sulphates using Mannheim furnaces, fittings in combustion units for crude oil (oil ash corrosion)and glass and silicate production.
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Mechanical Properties

Tensile strength: 586N/mm²
Yield strength 0,2% :240≥ N/mm²
Elongation:30≥ %
Hardness HB30:85≤ HB

Chemical Composition

Nickel

Ni

58% min

Carbon

C

0,05% max

Silicon

Si

0,015% max

Magnese

Mn

0,50% max

Sulphur

S

0,03% max

Copper

Cu

0,50% max

Phosphorus

P

0,02% max

Titan

Ti

0,50% max

Iron

Fe

7-11% max

Chromium

Cr

27-31% max

Heat Treatment

1080-1150°C followed by water quenching

Very good resistance to fluoride containing hot nitric acid,good resistance to stress corrosion cracking caused by alkalis,excellent resistance to stress corrosion cracking caused by media containing chloride and polythionic acids,excellent resistance to many aggressive aqueous media or in the primary and secondary loops of nuclear reactors,good resistance to oxidation, sulphidation and metal dusting in hot gases.

TIG and plasma welding processes. When welding roots, sufficient protectionof the root needs to be ensured with pure argon so that the welding seam is free of oxides after welding.

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