hi Manfred
I've used normal .8mm mig wire to weld mine with no problems from cracking during cooling, except when welding wading plates on the side when maybe 3 out of 20 welds cracked after cooling but i'm no welding expert I can only tell you of my experience.
good luck with the restoration, it will be nice for you to get the hull after blasting 
rick
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1941 mk1 mortar Carrier
1941 Mk1* Carrier
1942 Mk1* Carrier
1943 T16 Carrier
1945 Mk3 Dingo
1941 Mk3 Covenanter
1941 Mk4 Churchill AVRE (now sold)
1944 Mk6 Cromwell (now sold)
1952 Mk3 Centurion
1952 ARV Centurion
1952 ARV Centurion
1953 Mk3 Centurion (breaking)
Last edited by eddy8men; 10-06-13 at 19:35.
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