I think that 6061 T6 is obtained from 6061 T4 by annealing at 180°C for several tens of hours ; so to get 6061T4 from 6061T6 you would need to heat treat your 6061 T6 again : that is heat it up and quench it again so that you get a strong metal that welds more easily than 6061T6 but has lower...
I am currently trying to figure out what parameters are driving the weldability of studs on a sheet. I noticed that the thicker the sheet, the higher you have to put the voltage. Could anyone help me find a publication or an article explaining that ?
Thanx in advance.