The weld metal has
no directly equivalent parent material, although its
composition is related to Inconel 600. Mo and Nb give high
resistance to hot cracking, tolerance to dilution by
many combinations of nickel base and ferrous alloys,
and stable properties over a wide range of service
temperatures from –269°C to above 900°C.
The presence of Mo improves elevated temperature
properties above about 600°C.
These consumables are used for welding heat resisting or
high nickel alloys to themselves for use in furnace
equipment and petrochemical plants up to about
In addition they are suitable for dissimilar combinations
of the above alloys and others such as Monel 400,
Incoloy 825 to stainless, low alloy CMn steels without
the need to preheat. Stress relief may be carried out if
necessary, and transition welds for high temperature
service have good structural stability.
They can also be used for low temperature applications
such as 3%Ni or 5%Ni steels used for cryogenic vessels
and pipework in service at or below –100°C. Requirements for preheat and PWHT will be
dependent on the base material being welded.
For most nickel base materials no preheat or
PWHT is required.
Inconel™ type consumables similar to DAIKO 82 but with
lower Mn and a Mo addition.
In the as-welded condition this nickel base weld
metal consists of austenite with a few carbides.
Materials to be welded
Nickel base steel or high nickel alloys to themselves
and to mild, low alloy, and stainless steels.
Cryogenic 3-5%Ni steels. PROPRIETARY: Inconel® 600, 601 (Special Metals), Incoloy® 800, 800H, DS (Special Metals), Nilo® (Special Metals), Brightray® (Special Metals).