Use & Application
This is the most widely used cobalt base type and combines good abrasion resistance with resistance to corrosion, erosion and thermal shock. It also has excellent resistance to galling, sliding friction and compression at all temperatures. It is characterized by a hypereutectic structure consisting of a network of about 13% eutectic chromium carbides distributed in a cobalt-chromium-tungsten solid solution matrix. It is used to surface **valves and valve seats, hot shear blades, punches and dies, ingot tong ends and equipment for handling hot steel. Used for cat cracker slide valves in petrochemical industry**. Also finds applications in a very wide range of industries including steel, cement, marine and power generation. Preheat in the range 100-300°C or higher with slow cooling may be required to avoid the risk of cracking in multi-run deposits and/or highly restrained conditions. Deposits are machinable with carbide tools and may be finished by grinding where necessary These alloys are not subject to allotropic transformation and therefore do not lose their properties if the base metal subsequently is heat treated.
Alloy type
Cobalt based alloy composed of 27%-32% Chrome, 4%-6% Tungsten, 1%-2% Carbon, 3%-4% Nickel, 1%-2% Silicon and 3%-4% Iron.
Microstructure
In the as-welded condition the microstructure consists of a cobalt based austenite with a number of carbides and other complex phases.
Materials to be welded

Used for surfacing mild, low alloy and stainless steels, and also for nickel base alloys. Can also be used for the repair of UNS R30006, Stellite 6 (Deloro Stellite).

Products of the line Gr. 6

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