Aluminum 5356 Tig Welding Rod ER5356 3/32" 39" Long 10Ib Box5356 (commonly referred to as AlMgS) is a 5% magnesium aluminum filler metal that is available for MIG or TIG welding processes. The weld deposit of 5356 offers much better corrosion resistance when exposed to salt water. Common applications would be base metals 5050, 5052, 5083. 5356, 545,1 and 5456