HS321 Al-Mn alloy wire 
 Note: 311 is aluminum manganese alloy wire, weld metal has good corrosion resistance and high strength than pure aluminum, weldability and ductility is also very good. 
 Uses: Suitable for aluminum and other aluminum welding manganese and oxygen - acetylene welding time as a filler material. 



 HS331 aluminum-magnesium alloy wire 

 ER5556 aluminum-magnesium alloy wire 

 JIS A5556 
 Note: 311 is a small amount of titanium with the aluminum-magnesium alloy wire, weld metal has good corrosion resistance and thermal cracking performance, high strength. 
 Uses: It is aluminum-magnesium alloy welding and oxygen - the most basic of acetylene gas welding filler material, zinc magnesium alloy in aluminum welding and repair welding aluminum and magnesium castings have been used. 

 Aluminum and aluminum alloy welding wire for use: 
 Implementation of GB10858-89 standard 
 Aluminum and aluminum alloy welding wires are widely used in aluminum and aluminum welding and oxygen - acetylene welding made the filling material. 
 The choice of wire, the main base material according to the type of crack resistance of the joints, mechanical properties and corrosion resistance and other requirements into account. Sometimes, when a major conflict between a wire is selected to focus on solving the problem from the start. Take into account other aspects of requirements. Under normal circumstances, such as, welding aluminum and aluminum alloy components are used with the same or similar base metal grades of wire, so you can get a better corrosion resistance, but the tendency of large cracks in weld heat treatment to strengthen aluminum alloys, select the wire, crack resistance is mainly from the start address, then the composition of welding wire and base metal can be very different. A typical aluminum and aluminum alloy welding wire chosen as follows. 
 For example the base metal wire used to weld filler wire 
 TIG welding 
 L4 301 Pure Good Good 
 301, L5 Pure Good Good 
 LF3 good good 331 Mg 
 331 Mg LF5 good poor 
 Al-Mn-321 LF21 good very good 
 LF11 hard aluminum poor poor 311 
 LF12 hard aluminum poor poor 311 
 LF16 311 hard aluminum good poor 
 311 Forged aluminum LD2 good poor 
 311 forged aluminum lower bad LD5 
 Poor poor 311 LD10 aluminum forging 
 LD4 poor poor super-hard aluminum 331 
 TIG welding of aluminum and aluminum is a better way. Because the protective effect of argon and argon ions on the cathode broken oxide film role, welding can be no flux, which avoids the residue of the joints after welding corrosion. In addition, the welding argon gas flow to the welding area of the erosion, the joint significant of cooling, thus improving the joint organization and performance. However, due to no flux, solder before the clean-up requirements stricter than the other methods. Tungsten arc welding or melting can be very, manual or automatic (semi-automatic). Methods based on size or production conditions in the workpiece structure decisions. Tungsten sheet structure tends to be used hand-welding, and MIG welding thick plate to use. Tungsten arc welding by hand, the commonly used alternating current dollars, while the melting arc welding is used when the DCRP. 
 Oxygen - acetylene gas welding is a relatively simple and flexible method of welding equipment is also simple, thin and small parts for welding, but the heat dispersion, low productivity, large deformation, joint softening serious. Gas welding flame should be neutral or slightly oriented with flame, molten pool oxidation by oxidizing flame will make a serious, and acetylene weld will lead to too much air hole. Sheet metal welding preferably left to the welding method, to prevent overheating burn. Aluminum at high temperatures because of the color change, since welding can be welded in place, with the wire struck a tentative continuously heated at the metal surface, when the Department has with the adhesive are heated and stick with the wire ends out of flux under the droplet and the heated metal to fuse together, indicating that the premises are up to the melting temperature, can be immediately welded. Can also look at the surface of the welded oxide film, if slightly wrinkled, when they reached the melting temperature, can be welding. Aluminum and aluminum alloy welding flux must be used, transferred with water into a paste flux, welding, coating the surface or in the welding wire on a stick. 
 Application in the weld area before welding alkaline etching method to clean the oil on aluminum, oxides and other debris. Still in the weld area after welding flux and residue left in the wash with hot water must be clean, in order to avoid corrosion.