Inside You'll Find:

A step-by-step guide for developing and qualifying a welding procedure for 4140 steel (can also be used for other steels) so you don't miss any important details in your WPS.

Preheat and interpass temperature recommendations for 4140 and instructions on how to properly measure these tempertures.

Completely filled out WPS and PQR sample to use as a guide in developing your own welding procedures and qualification records.

Information on common issues faced when welding 4140 including hydrogen induced cracking and how to prevent it.


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