7a04 aluminum alloy is a cold-processed forged alloy with high strength, much better than mild steel. 7a04 is one of the commercially available high-strength alloys.
7a04 aluminum rod has a compact structure and strong corrosion resistance, making it excellent for aviation and marine plates. General corrosion resistance, good mechanical properties and anodic reaction.
Fine grains enable better deep drilling performance and enhanced tool wear resistance. 7a04 aluminum rod mechanical properties tensile strength σb (MPa): ≥560 elongation stress σp0.2 (MPa): ≥495 elongation δ5 (%): ≥6 Note: Mechanical properties of seamless pipe sample size: diameter >12.5 7a04 aluminum rod physical properties tensile strength: 524Mpa 0.2% yield strength: 455Mpa elastic modulus E: 71GPa hardness: 150HB density: 2.81g/cm^3
Material name: 7A04
Main features and application scope:
High strength, good heat treatment strengthening effect, medium plasticity in annealed and newly quenched states; unlike hard aluminum, the corrosion resistance in artificial aging state is better than that in natural aging state, and the natural aging process is slow and needs to go through 3 It takes several months to reach the age hardening peak, so 7A04 is used in the quenching artificial aging state. Its disadvantages are low structural stability, low low-frequency fatigue strength, and tendency to stress corrosion cracking. The alloy spot welding has good weldability but poor gas welding. The machinability after heat treatment is good, but the machinability after annealing is not good.
Mechanical properties
Tensile strength σb (MPa): ≥530 Elongation stress σp0.2 (MPa): ≥400 Elongation δ10 (%): ≥5 Note: Sample size of pipe longitudinal mechanical properties at room temperature: all Heat treatment specifications: Homogenization Annealing: heating to 450~465℃; holding for 12~14h; furnace cooling. 2) Complete annealing: heating to 390~430℃; holding for 30~120min; furnace cooling to 150℃ and air cooling. 3) Quenching and aging: quenching 465~480℃, water cooling; artificial aging (aluminum-coated plate) 115~125℃ 24h, (uncoated aluminum profile) 135~145℃ 16h, (semi-finished product) divided into 1 levels 115~125℃ 3h heating, 2-level 155~165℃ 3h air cooling. Status: Aluminum and aluminum alloy hot extruded seamless round tube (H112, T6 status)