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

ASTM A709 Steel Plate Supplier for Bridge Projects

ASTM A709 steel plate is widely used in highway, railway, and long-span bridge construction due to its high strength, excellent weldability, and reliable toughness under dynamic loads.

As an experienced ASTM A709 steel plate supplier, CJM provides A709 steel plates in stock with fast delivery, flexible processing, and export-ready solutions for global bridge projects. Available grades include ASTM A709 Grade 50, Grade 50W weathering steel, and HPS 70W high-performance steel, covering different load and environmental requirements.

ASTM A709 Steel Plate Supply Range

CJM supplies a full range of ASTM A709 steel plates for bridge fabrication and structural applications:

• Grades: A709 Gr.36, Gr.50, Gr.50W, HPS 50W, HPS 70W
• Thickness: 6 mm – 200 mm
• Width: 1500 mm – 3200 mm
• Length: 6000 mm – 18000 mm
• Delivery condition: As-rolled, Normalized, TMCP

A709 heavy steel plate is available for large-span bridges and heavy-load structural components such as girders, cross beams, and gusset plates.

Available ASTM A709 Steel Plate Grades

The ASTM A709 standard includes multiple grades designed for different bridge applications:

• ASTM A709 Grade 36
• ASTM A709 Grade 50
• ASTM A709 Grade 50W
• ASTM A709 Grade HPS 50W
• ASTM A709 Grade HPS 70W

Among these grades:

• ASTM A709 Grade 50 is commonly used for standard bridge structures requiring higher yield strength than Grade 36.
• ASTM A709 Grade 50W weathering steel is preferred for exposed bridge environments where reduced maintenance is required.
• ASTM A709 HPS 70W is designed for large-span bridges and heavily loaded structures requiring higher strength and improved toughness.

ASTM A709 Steel Plate for Bridge Applications

ASTM A709 steel plate is widely used in:

• Highway and railway bridges
• Long-span and cable-stayed bridges
• Coastal and marine bridges (A709 50W weathering steel)
• Heavy-load structural supports

Grade Selection by Application

• Standard bridges → A709 Grade 50 steel plate
• Corrosive environments → A709 Grade 50W weathering steel
• Large-span / heavy load → HPS 70W steel plate

For corrosion resistance and long-term durability requirements, see our ASTM A709 grade selection guide for bridge applications and weathering steel performance.

ASTM A709 Steel Plate Price Factors

The price of ASTM A709 steel plate depends on:

• Steel grade (Gr.50 vs 50W vs HPS 70W)
• Plate thickness and dimensions
• Delivery condition (as-rolled / normalized / TMCP)
• Order quantity and processing requirements

For an accurate quotation, please provide grade, size, and quantity.

ASTM A709 Steel Plate Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
A709 Gr. 36	≥ 250	400–550	≥ 20
A709 Gr. 50	≥ 345	485–620	≥ 21
A709 Gr. 50W	≥ 345	485–620	≥ 21
HPS 50W	≥ 345	485–620	≥ 21
HPS 70W	≥ 485	585–760	≥ 18

For a detailed comparison of ASTM A709 Grade 50, 50W, and HPS 70W, see our ASTM A709 selection guide.

ASTM A709 Steel Plate Chemical Composition

Typical chemical composition of ASTM A709 steel plate varies by grade. Weathering grades such as A709 50W and HPS 70W contain additional alloying elements (Cu, Cr, Ni) to improve corrosion resistance.

(Detailed composition available upon request.)

Processing and Export Supply Capability

As a global A709 steel plate supplier, CJM provides:

• Cutting, beveling, drilling services
• Surface preparation and protective coating
• Export packaging for long-distance shipping
• Fast delivery from stock

We supply ASTM A709 steel plates to Southeast Asia, the Middle East, Europe, and the Americas.

Explore our full range of bridge steel plates different load conditions, including ASTM A709 and other structural grades.

Why Choose CJM as Your ASTM A709 Steel Plate Supplier

CJM is an experienced ASTM A709 steel plate supplier, offering:

• Full grade coverage from Grade 36 to HPS 70W
• Heavy plate supply up to 200 mm thickness
• As-rolled, normalized, and TMCP delivery options
• Customized cutting, packing, and logistics solutions
• Long-term export experience for bridge and infrastructure projects

Packaging & Shipping of ASTM A709 Steel Plate

• Protective wrapping to prevent surface damage
• Moisture-proof and corrosion-resistant packaging
• Reinforced pallets for heavy plates
• Reliable global logistics partners

Get a Quote for ASTM A709 Steel Plate

Looking for a reliable ASTM A709 steel plate supplier?
Please send us your required grade, thickness, dimensions, and quantity for a fast and accurate quotation.

WhatsApp: +8618191906640
Email: info@cjmstainlesssteel.com

Frequently Asked Questions

• Q1: What is the delivery time for ASTM A709 steel plate?
  Usually 7–15 days for stock plates, depending on size and quantity.
• Q2: Do you supply A709 heavy steel plate?
  Yes, we supply A709 steel plate up to 200 mm thickness.
• Q3: Can you provide cutting and processing services?
  Yes, cutting, drilling, and beveling are available.
• Q4: What certifications are available?
  Mill test certificates (MTC) and third-party inspection can be provided.
• Q5: What is the MOQ for A709 steel plate?
  Flexible MOQ depending on stock availability.

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