High-Strength Corrosion-Resistant Tank Plate Selection

Material Performance Requirements
In the petrochemical field, high-strength corrosion-resistant tank plates for storage tanks must meet three core indicators: yield strength ≥355MPa, elongation ≥22%, and impact energy at -40℃ ≥80J. After TMCP processing, domestic Q345R steel plate exhibits a 40% improvement in H₂S stress corrosion resistance compared to traditional materials, offering a significant cost-performance advantage.

Process Technology Comparison
Comparing hot rolling (HR), normalizing (NR), and quenching and tempering (QT) processes: 12Cr2Mo1VR steel after QT treatment has an annual corrosion rate of only 0.08mm in 6% NaCl solution, and a welding joint coefficient of 0.9, making it particularly suitable for LNG cryogenic storage tanks. It is recommended to prioritize laser hybrid welding technology to control intergranular corrosion in the heat-affected zone.

Economic Evaluation
Based on the Q2 market quotation in 2025, composite steel plate (3mm stainless steel + 16mm carbon steel) saves 35% of the cost compared to integral alloy steel, with a service life cycle of 20 years. It is recommended to adopt the "carbon steel + 316L stainless steel" explosion bonding scheme, which balances initial investment and maintenance costs.