Our office is working in a number of existing buildings, 1900-1930's, and would like a procedure for determining the weldability of what we assume to be A7 or A9 steel.
Believe the AWS code has guidelines.....if not, contact them.........American Welding Society.....<br>
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In general welding should be possible with proper procedure to account for chemistry........we welded to many old bridges when I was with the railroad, built during early 1900's and earlier........<br>
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Of course, you should verify the chemistry of the steel for any critical welding.........the necessary welding procedures should be explained in AWS code or one of their publications.....