ASTM A709

ASTM A709 PLATE

ASTM A709 steel plate is in accordance with the standard specification for bridge structural steel. ASTM A709 steel plate is a carbon, high strength low alloy and quenched and tempered alloy steel mainly used in bridge construction. GNEE provides the following 5 grades of steel plate A709, 36, 50, 50W, HPS 50W. The atmospheric corrosion resistance index of the three grades of 50W, HPS 50W and HPS 70W is 6.0.

High strength: A709-50W steel plate has high yield strength and tensile strength, and can withstand large loads. Generally speaking, its yield strength is between 345-520MPa, and the tensile strength must be greater than or equal to 485MPa.

Weather resistance: The steel plate has good weather resistance and can be used for a long time in harsh climatic conditions without conventional anti-corrosion treatment. A dense rust layer can be formed on its surface, effectively preventing further corrosion inside.

Mechanical properties: In addition to high strength and weather resistance, A709-50W steel plate also has good welding and processing properties, which facilitates various welding and cutting operations during the manufacturing process.

A709 refers to the American standard: ASTM A structural steel for bridges, which is similar to my country's GB/T 714 structural steel for bridges. Of course, due to different standard systems, the data inside is different. 50 is the grade in the ASTM A709 standard (called steel grade in my country) A709-50T-2, A709-50F-2.
4. Bridge steel
Steel used to build railway and highway bridges. It is required to have high strength and sufficient toughness, low notch sensitivity, good low temperature toughness, anti-aging sensitivity, fatigue resistance and welding performance. The main steels used are low-alloy high-strength steels such as Q345q, Q370q, and Q420q.
5. That is, the structural steel for bridges with a yield strength of 345MPa. This grade is equivalent to the steel number in my country's GB/T 714 standard: Q345q
-2 means: Charpy V-notch impact test zone code
It has two situations: the letter T should be marked after the material grade code: Zone 2 is ≥20J at 4°C
The letter F should be marked after the material grade code: Zone 2 is ≥34J at 4°C
The question specifies that the zone code is Zone 2, but it does not specify whether it is T or F. The complete description is: A709-50T-2
6. A709-50F-2 Packaging, marking, and quality certificate: The packaging, marking, and quality certificate of steel plates should comply with the provisions of GB/T 247.

A709GR50 low alloy high strength structural steel plate has been widely used in building steel structure, construction machinery and other steel structures, and has been exported to South Korea, Taiwan and other places, with a cumulative export volume of more than 10,000 tons. Such as building steel structure, construction machinery, mining machinery, trucks, bridges, pressure vessels, etc., especially for construction and engineering machinery parts that require good weldability and toughness.

Committed to strict quality control and dedicated customer service, we have an experienced production staff ready to meet your needs and ensure customer satisfaction. We guarantee you a pleasant stay in China.

If you have more needs and questions about  steel, we are happy to advise you!

Hot Tags: astm a709, China astm a709 manufacturers, suppliers, factory, 203 x 133 x 30 Universal Beam, Carbon Equal Angle Steel, steel used in shipbuilding, Z type steel sheet piles, H channel beam, Grade D Shipbuilding Steel Plate