LY1 is the main rivet material for riveting aluminum alloy structures. It has low strength after quenching and natural aging, but it has high plasticity and good process performance. The weldability is the same as LY11, cutting performance is acceptable, and corrosion resistance is not High, widely used as structural rivet material with medium strength and working temperature < ff:smarttags" />100°C. LY2 is a heat-resistant hard aluminum, has high strength, high plasticity in thermal deformation, heat treatable and strengthened in quenching And used under artificial aging conditions, good machinability, corrosion resistance better than LD7, LD8 heat-resistant wrought aluminum, semi-finished products in the extrusion, there is a tendency to form coarse-grained rings, used to manufacture work at higher temperatures Bearing structure LT4/LY8/LY9 are all rivets alloys, LY4 has good heat resistance, can be used in 125-250°C, LY9 has higher strength, but its common disadvantage is that rivets must be after quenching 2 - Use within 6 hours.
The LT8 is suitable for the production of rivets for medium-strength rivets, LY10, with high shear strength. The riveting process is not limited by the heat treatment time, but the corrosion resistance is not good. The working temperature should not exceed 100°C. LY11 is an earlier standard hard aluminum, medium strength, heat treatable, used under quenching and natural aging conditions, good spot welding performance, cracking tendency during gas welding and argon arc welding, heat The state of plasticity is acceptable, and the machinability is still good in the quenching state, and the corrosion resistance is not high.
For the production of medium-strength parts and components, stamping and connecting components, parts of upsetting parts (such as screws, rivets) LY12 high-strength hard aluminum, heat-strengthened, in the annealing and just quenched state of plasticity, good spot welding performance, Gas welding and argon arc tend to crack, corrosion resistance is not high, and the machinability is good after quenching and cold hardening, and low after annealing. Used to make parts that require high loads and parts that work below 150°C. LY16/LY17 heat-resistant hard aluminum, the strength is not high at room temperature and high creep strength at high temperatures, the plasticity is higher in hot state, heat treatment can be enhanced, the welding performance is good, the corrosion resistance is not high, and the cutting processability is still good. Used to make parts that work at 250-350°C. Sheets can be used to make welding parts that work at room temperature or at high temperatures.