Circumferential Tensile Properties of Tank Plates

Key Mechanical Properties of Tank Plates
The latest test data in 2025 shows that the circumferential tensile strength of 5083-O aluminum alloy tank plates for aerospace applications reaches 310-330MPa (GB/T 228.1-2025), the yield strength is ≥240MPa, and the elongation at break is stable at 12%-15%. The anisotropy index (R-value) is controlled within the range of 0.95-1.05, which is significantly better than the fluctuation range of 1.2-1.5 of traditional rolling processes.

Process Optimization Directions
Through multi-pass variable-direction rolling technology, the grain orientation deviation angle is reduced from 15° to 8°, and the circumferential/axial strength ratio is increased to 0.98 (0.91 for traditional processes). Laser shock peening increases fatigue life by 40%, which is suitable for the 20-year design life requirements of LNG storage tanks.