Q1: What are ASTM A588, Corten A and Corten B steel sheets?

A: ASTM A588, Corten A and Corten B are high-strength weathering steel grades developed for outdoor atmospheric exposure. Unlike ordinary carbon steel, they do not rely on paint or surface coatings for corrosion protection. When exposed to air and moisture, the steel forms a dense, stable rust patina that effectively blocks further oxidation. This self-protection feature delivers outstanding weather resistance and extends the service life of outdoor steel structures. These grades are widely used in bridges, building facades, outdoor facilities and various infrastructure projects.

Q2: What sizes and thicknesses do you offer?

A: We supply weathering steel plates in standard sizes and also provide fully customized dimensions to match project needs.

Available size range:

Thickness: 2mm – 100mm (custom cutting available)

Width: 1500mm – 3200mm

Length: 3000mm – 12000mm

We also offer one-stop processing services, including custom cutting, surface treatment, drilling and tailored fabrication support.

Q3: What is the difference between ASTM A588, Corten A and Corten B?

A: Each weathering steel grade features unique chemical composition and mechanical properties, making them suitable for different scenarios:

ASTM A588 – High-strength weathering steel with reliable atmospheric corrosion resistance. Mostly used for bridges, buildings and heavy structural projects.

Corten A – Contains higher phosphorus content, delivering excellent weathering performance. Ideal for architectural cladding, exterior decoration and landscape structures.

Corten B – Provides higher strength and better toughness, designed for heavy-load conditions. Commonly applied in railway facilities, bridge engineering and industrial equipment.

The best grade selection depends on actual load demands, local climate and project design standards.

Q4: Why choose weathering steel over regular carbon steel?

A: Weather resistant steel outperforms ordinary carbon steel for outdoor applications with obvious practical advantages:

Excellent anti-corrosion performance: The self-forming protective patina stabilizes the steel surface and stops continuous corrosion.

Lower long-term maintenance: Eliminates frequent painting and recoating work, greatly reducing later maintenance costs.

Extended service life: Performs stably under long-term outdoor, humid and harsh weather conditions.

Unique industrial aesthetics: The natural rusted texture creates a distinctive architectural and artistic appearance.

Stable structural strength: Maintains reliable mechanical performance for heavy-duty engineering projects.

Q5: What are the main applications of Corten steel?

A: Corten weathering steel is widely adopted in fields that require long-term outdoor durability:

Steel bridges and traffic infrastructure

Building exterior walls, facades and roofing systems

Outdoor sculptures, landscape and municipal decorative structures

Industrial containers, mechanical equipment and offshore port facilities

Railway structures, heavy steel frames and marine-related projects