ASTM A709 Steel Plate for Bridges: High-Strength, Low-Alloy Structural Steel

Overview

ASTM A709 Bridge Steel Plate is a high-strength low-alloy (HSLA) structural steel widely used in the fabrication of bridges and related infrastructure. It offers excellent mechanical properties, weldability, and atmospheric corrosion resistance, especially in the Grade 50W and HPS series.

CJM supplies a full range of ASTM A709 grades, available in various thicknesses and dimensions to meet international bridge engineering requirements. These plates are hot-rolled and available in normalized or thermomechanical (TMCP) conditions for superior performance.

Available Grades

• ASTM A709 Grade 36
• ASTM A709 Grade 50
• ASTM A709 Grade 50W (weathering steel)
• ASTM A709 Grade HPS 50W
• ASTM A709 Grade HPS 70W

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Size Range

Specification	Range
Thickness	6 mm – 120 mm
Width	1500 mm – 3200 mm
Length	6000 mm – 18000 mm
Delivery Condition	Hot Rolled, Normalized, TMCP
Standard	ASTM A709 / ASME SA709

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Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Charpy Impact
A709 Gr. 36	≥ 250	400–550	≥ 20	Optional
A709 Gr. 50	≥ 345	485–620	≥ 21	Optional
A709 Gr. 50W	≥ 345	485–620	≥ 21	Improved CVN
HPS 50W	≥ 345	485–620	≥ 21	-23°C
HPS 70W	≥ 485	585–760	≥ 18	-23°C

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Chemical Composition (% by weight)

Grade	C	Mn	Si	P (max)	S (max)	Cu	Cr	Ni
A709 Gr. 50	≤0.23	0.85–1.35	≤0.40	0.035	0.045	—	—	—
A709 Gr. 50W	≤0.19	0.85–1.35	0.15–0.50	0.035	0.045	0.25–0.40	0.40–0.65	≤0.40
HPS 50W	≤0.11	1.20–1.60	0.15–0.50	0.020	0.010	0.25–0.40	0.40–0.70	0.40–0.75
HPS 70W	≤0.14	1.35–1.65	0.15–0.50	0.020	0.010	0.25–0.40	0.40–0.70	0.40–0.75

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Typical Applications

• Highway and railway bridge decks
• Structural beams and girders
• Suspension bridge components
• Box girders and trusses
• Cable-stayed bridge towers
• Offshore platform supports (Grade 50W)

Why Choose Our Bridge Steel Plate & Coil?

CJM is a trusted bridge steel plate supplier in China, offering:

• Full grade coverage from Grade 36 to HPS 70W
• Fast delivery from over 1 million tons in stock
• Customized cutting and logistics solutions
• Extensive export experience to Europe, Southeast Asia, Africa, and the Americas
• Technical support for project-specific requirements

Packaging & Shipping for Bridge Steel Plate & Coil

We understand that the safe and secure delivery of your Bridge Steel Plates and Bridge Steel Coils is crucial. To ensure your products arrive in perfect condition, we use durable and industry-standard packaging methods that protect them during transport.

• Packaging Options:
  • Steel plates are carefully wrapped and packed with protective materials to avoid damage during handling.
  • Steel coils are securely strapped and wrapped in heavy-duty plastic or corrosion-resistant material to ensure they are protected from environmental factors during transit.
• Packaging Features:
  • Waterproof Wrapping: To protect against moisture and corrosion.
  • Reinforced Pallets: For easy handling and to prevent deformation.
  • Custom Packaging: Tailored packaging solutions are available for specific needs, ensuring optimal protection.

CJM offers fast and efficient shipping to major international markets, and work with trusted logistics partners to guarantee timely delivery and minimize any risk of delay. Our dedicated support team is available to answer any shipping-related inquiries.

Shipping time and cost depend on your location and the order volume. Please contact us for detailed quotes and estimated delivery times for your specific project.

Ready to Start Your Project?

Contact us today for more information on our Bridge Steel Plate and Bridge Steel Coil solutions. We offer competitive pricing and tailored support to meet your project’s specific requirements.

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment