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  1. WelderCWI

    4140 to cast steel preheat

    I have a gear that is made up of a cast steel center hub and a 4140(annealed) ring that the teeth wil be cut in post weld. (Flame hardened after machining) This is approximately 24" dia. and we will be welding a 1/4" fillet weld all around both sides with either FCAW (E71T) or GMAW (ER70S-6)...

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