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  1. chk68

    Welding 4140 Q&T to 1026 Seamless Tube

    We need to weld a premachined 4140 Q&T (131,000 psi yield) pin into a 1026 hrs seamless tube. The pin is shrunk fit into the tube before welding, and the weld is just a secondary means to assure the pin does not work loose or spin in the bore. Since the 4140 is quenched and tempered and...

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