ASTM A709 steel Properties that Combine Strength and Weldability

ASTM A709 Structural Steel At katalor, we lead the industry with our selection of high-quality, ASTM certified structural steels for the construction industry. ASTM International plays an essential role in ensuring that metals for construction applications meet the highest standards of consistency and quality. ASTM A709 steels are among the most sought-after materials for outdoor infrastructure. The composition of A709 ensures strength, long lifespans, and resistance to the harshest outdoor conditions.

ASTM A709 steel An Ideal Strength-to-Weight Ratio

The ASTM A709 alloy steel, which is composed of iron, manganese, carbon, and other elements, maintains an excellent strength-to-weight ratio. This means that smaller quantities of steel are required in order to meet our customer’s varying strength requirements, improving efficiency and cutting down on excess weight.

ASTM A709 alloy steel also maintains excellent corrosion resistance, allowing it to maintain long lifespans–even during the most harsh atmoSPHEric conditions. These properties make A709 steel ideal for applications such as bridges, and is a standard material employed by the American Association of State Highway and Transportation.

ASTM A709 steel Properties that Combine Strength and Weldability

ASTM A709 steel maintains a tensile yield strength of 50,000 psi and an ultimate tensile strength of 65,300 psi.
It is also highly weldable and can produce excellent quality welded joints. The high-strength, low alloy steel can be used in

• I-Beams
• Structural Angles
• Wide Flange Beams
• Steel Plates
• Structural Steel Channels

Composition Breakdown

The composition of ASTM A709 steel can vary somewhat, but generally stays within the following parameters

•  98% Iron
•  0.23% Carbon
•  1.35% Manganese
•  < 0.040% Phosphorous
•  < 0.050% Sulfur

As one of the largest service centers for structural steel in the U.S., ASTM A709 steel is just one of the many materials Infra-Metals offers. Contact us today to learn more about this alloy or the many additional options we have available.

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