Be careful Harry, the heat from welding can change the characteristics of a silver soldered joint, remember, you are using a higher instant heat. I remember from somewhere in the dim and distant past that you should not expose silver solder to over heating, especially if it has already been soldered... Does that make sense? I will delve through my bits and pieces to see if I can find the info, might take a while, got to move the Santa trains operation on the SVR to Bewdley from Arley starting this weekend. Dave. ----- Original Message ----- From: "Harry W. Wade" <hww@xxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Thursday, October 18, 2007 4:53 PM Subject: [modeleng] Work in progress It's been kind of quiet here lately and I've not done much of anything worth breaking the silence over, but some time ago I began the fabrication of the smokebox saddle for my 2X TICH which I am building up with cut and milled pieces of 1/4" steel plate. I initially envisioned welding this assembly together but I am an aBYSmal welder so I caved in and decided to silver solder. This went well enough but I have a final piece of plate to add which could not be added until some machine work and hand shaping was done on the basic assembly, after which more machining and hand shaping would be done. This has raised a question. If I want to add the final piece by welding (and I'm not certain I will weld it), will the weld "take" as it passes through the soldered areas or will it not adhere? My guess is it will probably burn through as if it was a patch of oxide. Cheers, Harry wade Nashville USA Regards, Harry Wade Nashville Tennessee MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.