... 2.Elongation:>20% 3.Surface:Smooth1060 Aluminum Tube for refrigeration1060 Aluminum Tube extruded aluminum tubealuminum hexagon tube ... welding, welding and exposure to hydrogen atoms welding, brazing can not afford; vulnerable processing and extension of various ... 10Elongation%≥37% high-precision hard aluminium tubes, used for aviation,spaceflight,petroleum,military industry, new energy,heavy ...