Product Description
Welding of large castings involves high rate of heat dissipation from the weld zone. This results in "improper fusion" defect and failures in service. The nickel-based electrodes used for joining cast iron do not allow sufficient wettage to allow proper fusion of base metal. Even crack tips cannot be removed from the base metal due to low penetration of nickel-based electrodes.
There are frequent problems of low strength (max 44 kgf/mm2), joint brittleness (%Elongation = 10 max.) and porosities in weld causing poor radiographic performance.
New generation OK 92.60 is developed by ESAB Sweden R&D with a special core design enabling higher current capacity and strength (54 kg/mm2) with elongation as high as 13%. Initial trials in Indian market has been highly successful. It has welded extremely difficult jobs, which did not yield to normal cast iron consumables.
Protection against micro-fine particles
A new recipe to tackle erosion by micro-fine particles. OK 84.84 has been developed by analyzing layers of deposit under Transmission Electron Microscope and stabilizing a unique structure available by no other hardfacing technique. Fine dispersion of Titanium and Vanadium carbides provide the alloy adequate matrix protection resulting in enormous life enhancement while handling very fine ash, coal dust, crushed ores etc. The alloy attains RC 62 in single layer itself.
State-of-the-art alloy for 14% Manganese Steel
New generation "Asträ" class electrodes revolutionize Manganese steel buffering and attachments. Asträ MN is a crack resistant alloy for heavy components made of Hadfield Manganese Steel. The crystalline ripple free bead with self-release slag ensures bonding strength and high resistance to impact and abrasion.
When everything fails...
Critical maintenance jobs require guaranteed performance against in-service embrittlement, weld strength and compatibility with various alloys. Usual dissimilar steel welding electrodes endeavor to strike a compromise between strength and weld ductility. OK 68.53, the nitrogen-bearing electrode, has been developed to scale the limits of strength (85 kg/mm2) without any compromise of ductility (35% elongation). It has already been proven in India and elsewhere. In some of these areas, widely publicized universal electrodes actually failed in service.
