astm a36 carbon structural steel

ASTM A36 carbon structural steel is one of the most widely used structural steel grades in the world. It is a low carbon steel that is typically used in structural applications such as bridges, buildings, and other infrastructure projects. In this article, we will explore the key features and properties of ASTM A36 carbon structural steel.

Chemical Composition

The chemical composition of ASTM A36 carbon structural steel includes carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, and molybdenum. The carbon content is typically 0.26% to 0.30%, which makes it a low carbon steel. The other elements are added to improve the strength, toughness, and corrosion resistance of the steel.

Mechanical Properties

ASTM A36 carbon structural steel has excellent mechanical properties, which make it suitable for a wide range of structural applications. Its tensile strength is between 400MPa and 550MPa, and its yield strength is between 250MPa and 400MPa. It has a high elongation, which means that it can deform without breaking under stress. It also has good ductility, which makes it easy to form and weld.


ASTM A36 carbon structural steel is widely used in a variety of structural applications. It is typically used in the construction of buildings, bridges, and other infrastructure projects. It is also used in machinery and equipment manufacturing, as well as in the automotive industry. Some of the common applications of ASTM A36 carbon structural steel include:

1. Building construction: ASTM A36 steel beams are used in the construction of buildings to provide structural support. It is also used for construction of columns and other load-bearing members.

2. Bridge construction: ASTM A36 steel is widely used in the construction of bridges. It is used for bridge girders, beams, and other structural components.

3. Machinery and equipment manufacturing: ASTM A36 steel is used in the manufacturing of various types of machinery and equipment. It is used for the fabrication of frames, gears, and other components.

4. Automotive industry: ASTM A36 steel is used in the automotive industry for the manufacturing of chassis, frames, and other components.


In conclusion, ASTM A36 carbon structural steel is a versatile and widely used material in the world of structural engineering. Its excellent mechanical properties, low cost, and wide availability make it a popular choice for a variety of applications. Whether you are building a bridge, constructing a building, or manufacturing a machine, ASTM A36 carbon structural steel is a reliable and durable choice.

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