I posted a link to this publication ( pdf format ) in another thread and thought it would be useful in general.The tech section starts at page 227 and has quite a bit of useful info.Here is the index on what it contains................Technical and Trade Information... 22812.1 Terms & Definitions... 22912.2 Basic types of welded joints... 23312.3 Welding Positions & Symbols... 23712.4 Defects in welding... 24312.5 Distortion, causes & control... 24912.6 Safety in Welding... 25412.7 Consumables Classification Tables... 25812.8 Shielding Gas Information... 27612.9 Welding Guide... 28612.9.1 Welding of Steel... 28612.9.2 Welding of Stainless Steel... 31012.9.3 Welding of Aluminium... 32012.9.4 Welding of Cast Iron... 34812.9.5 Welding of Copper & Copper Alloys... 35712.9.6 Welding of Dissimilar Metals... 36812.10 Hardfacing Information... 37012.11 Deposition Data... 39212.12 Technical Facts & Figures... 399http://www.austwelding.com.au/Techni...ide%202008.pdfHope it helps some.