Name:2024-T4 hexagonal aluminum bar
Material Name: aluminum alloy extruded rods (≤22mm, H112, T4 state)
Grade:2024
●Characteristics and scope of application: High-strength hard aluminum, the same pressure processing properties and machinability are the same as 2014 hexagonal aluminum bars, and the plasticity is good under annealing and quenching conditions. The alloy can be quenched and aged. The general corrosion stability is the same as that of 2014 . When heated to 150-250 °C, the tendency to form intergranular corrosion is smaller than that of 2014 hexagonal aluminum bars. The spot weldability is the same as that of 2014 hexagonal aluminum bars and 2017 hexagonal aluminum bars, and the argon arc welding is 2014 hexagonal aluminum bars. As good, but worse than 2017 hexagonal aluminum bars.
●Chemical composition:
Aluminum Al: balance
2024-T4 aluminum rod
Silicon Si: ≤0.50
Copper Cu: 3.8 to 4.3
Magnesium Mg: 1.7 ~ 2.3
Zinc Zn: ≤ 0.10
Manganese Mn: 0.50~1.0
Titanium Ti: 0.03 to 0.15
Be : 0.001 ~ 0.005
Iron Fe: 0.000 ~ 0.500
Note: Single: ≤ 0.05; Total: ≤ 0.10
●Mechanical properties:
Tensile strength &;b (MPa): ≥ 430 conditions
Yield strength &;0.2 (MPa): ≥ 285
Elongation δ5 (%): ≥10
Note: Longitudinal mechanical properties of bar at room temperature Specimen size: Bar diameter (aluminum square bar, hexagonal aluminum bar inscribed circle diameter) ≤ 22
● Heat treatment specification:
1) Complete annealing: heating 390 ~ 430 ° C; with the effective thickness of the material, the holding time is 30 ~ 120min; with the temperature of 30 ~ 50 ° C / h with the furnace cooled to 300 ° C, and then air cooled.
2) rapid annealing: heating 350 ~ 370 ° C; with the effective thickness of the material, holding time 30 ~ 120min; empty or water cooled.
3) quenching and aging: quenching 500 ~ 510 ° C, air cooling; artificial aging 95 ~ 105 ° C, 3 h, air cooling; natural aging room temperature 120h
