Usage

Medium-thick plates (6–25.0 mm) and thick plates (25.0–100.0 mm) are widely used across various industrial sectors due to their excellent mechanical properties and adaptability in processing. Below is a categorized overview of their primary applications:

I. Construction Engineering and Bridge Building

Medium-thick plates serve as core materials for large-scale building structures and bridges. They are used to fabricate steel frameworks for high-rise buildings, bridge main bodies, and support components. For example, bridge steel plates (e.g., grades Q235q, Q345q) must withstand dynamic loads, impacts, and corrosion resistance. Additionally, medium-thick plates are employed in roofing panels and building envelopes.

II. Machinery Manufacturing and Transportation

Construction Machinery: Used to produce load-bearing parts for heavy equipment like excavators and cranes, such as hydraulic brackets and crawler plates.

Automotive Industry: Low-alloy steel plates (2.5–12.0 mm thick) are utilized for manufacturing vehicle frames (longitudinal and cross beams), requiring high strength, cold-bending, and stamping performance.

Agricultural Machinery: Wear-resistant parts and welded components for tractors and similar equipment also rely on medium-thick plates.

III. Energy and Pressure Vessels

Boiler Manufacturing: Boiler steel plates (e.g., Q245R) must endure medium-temperature (below 350°C) and high-pressure environments while maintaining excellent weldability and cold-bending properties.

Pressure Vessels: Plates such as Q345R and 14Cr1MoR are used in oil and chemical industries for gas separation, storage, and transportation equipment, demanding high strength, corrosion resistance, and weldability.

IV. Shipbuilding and Marine Engineering

Shipbuilding steel plates (e.g., grades A32, D36) require high strength, seawater corrosion resistance, and superior welding performance. They are used in hull structures, decks, and bulkheads. Additionally, medium-thick plates are applied in special