The 2a14 aluminum introductory material Name: 2A14 formerly: LD10 
 Standard: GB / T 3191-1998 
 Features and Scope: 
 2A14 composition and performance point of view it is a hard aluminum alloy can also fall 2A50 wrought aluminum alloys, it the 2A50 different place is that high copper content, so the higher strength, good heat resistance, but in the hot state under plastic is better 2A50 good, the alloy has good machinability, electrical resistivity, spot and seam welding performance, arc welding and gas welding performance; can be heat treated to strengthen the squeeze effect; Therefore, the vertical lateral performance has differences; corrosion resistance is not high, but in the artificial aging state to intergranular corrosion tendency and stress corrosion cracking tendency. 
 Chemical composition 
 Chemical composition: 
 Al of Al: margin 
 Silicon Si: 0.6 to 1.2 
 Copper Cu: 3.9 ~ 4.8 
 Magnesium Mg: 0.40 ~ 0.8 
 Zinc of Zn: ≤ 0.30 
 Mn Mn: 0.40 ~ 1.0 
 Ti a Ti: ≤ 0.15 
 Ni - Ni: ≤ 0.10 
 Iron Fe: 0.000 to 0.700 
 Note: Individual: ≤ 0.05; Total: ≤ 0.10 
 Mechanical properties 
 Mechanical properties: 
 Tensile strength σb (MPa): ≥ 440 
 The elongation δ5 (%): ≥ 10 
 Note: The bar at room temperature longitudinal mechanical properties 
 Sample size: the bar diameter (square bar, hexagon bar inscribed circle diameter) ≤ 22 
 Heat Treatment Specification: 
 1) Homogenization Annealing: heating 475 ~ 490 ℃; insulation 12 ~ 14h; furnace cooling. 2) complete annealing: heating the 350 ~ 400 ℃; with the material 
 Effective material thickness, holding time of 30 ~ 120min; 30 ~ 50 ° C / h speed with furnace cooling to 300 ℃, and then air-cooled. 3) fast 
 Speed ??annealing: heating to 350 ~ 460 ℃; holding time of 30 ~ 120min; air-cooled. 4) quenching and aging: hardening 495 ~ 505 ° C, water 
 Cold; natural aging at room temperature 96h. 

 Contact: Miss Liu 

 -57,629,093 
 Fax :021 -57,629,810