I was wondering if I may call on the advice and opinions of this group. I am fairly new to the fun and games that we all know and love as welding, in fact the only reason I started to weld was to help build a robot for Robot Wars here in the UK but I digress. My question is this, I work for a heat treatment company and one of the treatments we carry out is aluminium treatments. This involves heating the workload at 535 deg. C for 6 hours and then quenching into hot water at 75 deg. C. The baskets we use are made from3mm thick x 75mm mild steel angle but after being put through the above process repeatedly the welds start to crack. I have been repairing the baskets with a 2.5mm E6013 rods but was wondering if anyone here would recommend using a different rod or carry on as I am. I have been having some trouble with the deterioration of the steel making the welds a bit scraggy, to use a technical term. If any one has any ideas or comments I would be glad to hear them.