ASTM A709/709M High Strength Low Alloy Steel Plate for Bridges

ASTM A709/A709M structural steel plates are engineered for bridge construction and other heavy structural applications, providing high-strength, excellent weldability, and superior corrosion resistance.

Designed to withstand demanding environments, these plates are ideal for girders, decks, supports, and other critical bridge components. Available in multiple grades - Grade 36, Grade 50, Grade 50W, HPS 50W, and HPS 70W - ASTM A709/A709M steel ensures structural integrity, safety, and long service life across diverse climates.

Certified under ASTM standards and compatible with AASHTO M270 specifications, these plates can meet Charpy impact test requirements for specific zones and anticipated service temperatures.

Note: Composition may vary slightly depending on plate thickness and manufacturing method.

Standards: ASTM A709/A709M

Grades: 36, 50, 50W, HPS 50W, HPS 70W

Dimensions: T 5–350 mm × W 900–4100 mm × L 3000–25000 mm

Supply Conditions: AR = As-rolled, TM = Thermo-Mechanical Controlled Processing, CR = Controlled Rolling, QT = Quenched & Tempered, N = Normalized

Packing: Steel-framed plywood pallets

Place of Origin: Made in China

MOQ: 50 tons

Transportation: Railway, Sea

Bridge Construction:
Ideal for building bridges of all spans and designs, providing essential strength and durability for girders, decks, and supports.

Highway Infrastructure:
Extensively used in highway projects to enhance safety and long-term performance under extreme weather conditions.

Railway Bridges:
Suitable for railway bridge construction, supporting heavy loads and ensuring reliable transportation.

Urban Infrastructure:
Employed in pedestrian bridges, overpasses, and elevated roadways to improve urban mobility.

Corrosion-Resistant Structures:
Grades such as 50W and HPS 50W are designed for bridges exposed to marine or industrial environments, extending service life and reducing maintenance costs.

Structural Components Beyond Bridges:
Applied in buildings, stadiums, and industrial structures where high-strength, durable steel is required.

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What is A709 grade 50W steel?

ASTM A709-50W is a standard specification for structural steel primarily in the fabrication of steel bridges. ASTM A709-50W covers high strength, low allow steel structural shapes, plates and bars.

What is ASTM A709 steel grade?

The ASTM A709 is the Standard Specification for Structural Steel for Bridges and encompasses carbon, high-strength low-alloy, and quenched and tempered alloy steels used as structural plates in the construction of bridges. SSAB offers the following five grades of A709; 36, 50, 50W, HPS 50W and HPS 70W.

What is the difference between ASTM A572 Grade 50 and ASTM A709 Grade 50?

A572 Grade 50: Used in a wide range of structural applications, including buildings, transmission towers, equipment, and general construction. It's not specifically optimized for bridges. A709 Grade 50: Primarily used for bridge construction and other structures where enhanced toughness and weldability are critical.

What is the yield strength of ASTM A709 grade 50?

Grade 50 steel of this specification requires a minimum yield strength of 50 ksi. Used as structural members in bridge building or for similar structures.

What is the difference between ASTM A36 and A709?

ASTM A709 grade 36 is a bridge material wherein carbon adds to the strength and hardenability of the steel. A36 has less than0. 30% carbon and thus, do not possess high hardenability. ASTM A709 grade 36 steel plate has improved corrosion resistance and can be used in outdoor applications.

What is ASTM A572 grade 50 equivalent to?

ASTM A572 Grade 50 is equivalent to several other steel grades, with the most common international equivalents being S355JR (European standard) and Q345B (Chinese standard). The best equivalent depends on the specific project requirements, so it is always best to consult material specifications and a specialist to confirm compatibility.

What is the difference between ASTM A36 and ASTM A572 GR 50?

As mentioned earlier, A36 is steel that has a minimum yield strength of 36,000 PSI. This grade derives its strength from a combination of carbon and manganese. On the other hand, A572-50, for example, is a type of steel with a minimum yield strength of 50,000 PSI.

What is the difference between A572 and s355?

In summary, both ASTM A572 Grade 50 and S355JR are excellent choices for structural steel applications, with ASTM A572 Grade 50 providing higher strength capabilities and S355JR offering versatility and widespread use in European construction projects.

Is A572 steel corrosion resistant?

A572 steel is typically used in structural applications due to its high strength, ductility, weldability and corrosion resistance. These applications include structural sections, reinforcing bars, bridges, skyscrapers and houses.