Nov 27, 2012 #1 newweldeng09 Mechanical Oct 31, 2008 84 Can the minimum temperature for welding be below the preheat temperature?
Nov 27, 2012 #2 stanweld Materials May 9, 2003 2,906 In general yes. 100F below the preheat used and documentsed on the PQR and it must be specified in the WPS. Upvote 0 Downvote
In general yes. 100F below the preheat used and documentsed on the PQR and it must be specified in the WPS.
Nov 27, 2012 #3 metengr Materials Oct 2, 2003 15,478 Agree with stanweld. You are limited to 100 deg F or less change in minimum preheat temperature without having to re-qualify a WPS. Upvote 0 Downvote
Agree with stanweld. You are limited to 100 deg F or less change in minimum preheat temperature without having to re-qualify a WPS.
Nov 28, 2012 #4 stanweld Materials May 9, 2003 2,906 Should have added, unless the mandated Code of Construction or Contract specifies a minimum preheat temperature. Upvote 0 Downvote
Should have added, unless the mandated Code of Construction or Contract specifies a minimum preheat temperature.
