royal 240

should i preheat for a hardsurfacing welding job?


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it depends on the base metal...if the part you are hardfacing is something hardenable like AR400 (the AR stands for abrasion resistant) or some other metal that will become hard and brittle from the welding, then yes preheat. A preheat generally might help and probably wont hurt.

the hardfacing rod itself is hard but mostly due to carbides...the preheat need is more due to base metal characteristics.

when in doubt, preheat.