🟪 Product Overview

Bridge & Construction Structural Steel Plate is engineered for high load‑bearing capacity, excellent toughness, and superior atmospheric corrosion resistance.

These steels are widely used in:

• Highway bridges
• Railway bridges
• Long‑span structures
• Heavy construction projects
• Structural members requiring high strength and durability

Compared with general structural steel, bridge‑grade steel offers:

• Higher yield and tensile strength
• Better fracture toughness
• Improved weldability
• Enhanced weathering resistance (A588 / A709‑50W)
• Superior performance under dynamic loads

🟪 Key Features

• High strength for demanding structural applications
• Excellent toughness for low‑temperature environments
• Superior atmospheric corrosion resistance (weathering grades)
• Good weldability and fabrication performance
• Ideal for bridge beams, girders, and structural frameworks

🟪 Included Grades

ASTM Bridge Steel Grades

• A709 Gr 36
• A709 Gr 50
• A709 Gr 50W（Weathering Bridge Steel）
• A709 HPS50W（High‑Performance Steel）

Weathering Bridge Steel (Corten‑Type)

• A588 (A/B/C/K)
• S355J0W / S355J2W
• Q355GNH

High‑Strength Construction Steel

• S355JR / S355J0 / S355J2
• Q355B / Q355C / Q355D / Q355E

🟪 Mechanical Properties (Typical)

Grade	Yield Strength	Tensile Strength	Impact Toughness
A709 Gr 50	≥345 MPa	485–620 MPa	High
A709 Gr 50W	≥345 MPa	485–620 MPa	High
A588	≥345 MPa	485–620 MPa	Excellent atmospheric resistance
S355J2	≥355 MPa	470–630 MPa	27 J @ −20°C
Q355D	≥355 MPa	490–630 MPa	27 J @ −20°C

🟪 Chemical Composition (Typical)

Grade	C (%)	Mn (%)	Si (%)	P (%)	S (%)	Cr (%)	Cu (%)
A709‑50W	≤0.19	≤1.35	≤0.40	≤0.035	≤0.040	0.40–0.65	0.25–0.45
A588	≤0.19	≤1.35	≤0.40	≤0.035	≤0.040	0.40–0.65	0.25–0.45
S355J2W	≤0.16	≤1.60	≤0.55	≤0.040	≤0.040	0.40–0.80	0.25–0.55

🟪 Product Specifications

Thickness

• 6 – 200 mm

Width

• 1500 – 3000 mm

Length

• Custom lengths available

Delivery Conditions

• Hot Rolled
• Normalized
• Thermo‑Mechanically Rolled
• Weathering Grade Options

🟪 Applications

Bridge Engineering

• Highway bridges
• Railway bridges
• Long‑span structures
• Bridge beams & girders

Construction & Infrastructure

• High‑rise buildings
• Industrial structures
• Heavy‑load frameworks
• Structural members

Weather‑Exposed Structures

• Outdoor steel structures
• Transmission towers
• Architectural steelwork

🟪 Why Choose WelSteels

• Full range of bridge‑grade and construction‑grade steel plates
• High‑performance weathering steel options
• Precision cutting and processing
• SGS / BV inspection
• Export‑grade seaworthy packaging