welding/heat affected zone (HAZ) for butt weld low carbon

[boilercop]

I've read in a welding book that there is a maximum distance from the weld (butt weld) for the heat affected zone(HAZ) but I can't recall where. For instance on a half inch thick plate the heat affected zone is one eight of an inch (from Metals and How to Weld Them, Lincoln Foundation). Is there a base metal thickness where the heat affected zone distance reaches a maximum from the weld? Say after 1 inch thick plate the HAZ goes to 1/2 inch and is still 1/2 inch for 1/1/2 plate?

 

[metengr]

I don't believe there is any specific correlation regarding the relative size of a BM HAZ to base metal thickness other than a general observation because the size of the BM HAZ is really dependent on the welding process and technique.

 

[stanweld]

The width of the HAZ is dependent upon welding heat input, preheat/interpass temperature, and cooling rate. Cooling rate increases as thickness increases and as preheat/interpass temperature decreases for a given material. In short, the answer to your question is no.