Q235 steel is a popular carbon structural steel in China, similar to ASTM A36 in the United States and S235JR in Europe. It is distinguished by its low carbon content (0.22% maximum) and reasonably high tensile strength (370-500 MPa). Q235 steel has excellent weldability, machinability, and formability, making it popular in general structural applications such as buildings, bridges, and machines. It is often used to make steel plates, pipelines, and sections. Furthermore, Q235 steel is frequently utilized as a raw material in galvanized steel and other coated steel products.

According to China’s national standard GB/T 700, Q235 steel has the following chemical composition (in mass percentages):

Carbon (C): <0.22%.

Silicon (Si): <0.35%.

Manganese (Mn): <1.40%.

Phosphorus (P): <0.035%.

Sulfur (S): <0.045%.

Q235 carbon steel exhibits several characteristics that contribute to its widespread use in various applications. Here are some key characteristics of Q235 steel:

Low Carbon Content: Q235 steel has a carbon content of less than 0.22%, which contributes to its excellent weldability and formability. The low carbon content also reduces the risk of brittleness during fabrication and improves the overall ductility of the material.

High Tensile Strength: Q235 steel exhibits a relatively high tensile strength, typically ranging from 370 to 500 MPa. This high strength allows it to withstand heavy loads and makes it suitable for structural applications.

Good Ductility and Toughness: Q235 steel demonstrates good ductility, meaning it can be stretched or bent without breaking. It also exhibits good toughness, which enables it to absorb energy and resist fracture under impact or dynamic loading conditions.

Excellent Weldability: Q235 steel is highly weldable and can be easily joined through various welding methods, including arc welding, resistance welding, and gas welding. It forms strong and reliable welds, allowing for efficient fabrication and construction.

Versatility: Q235 steel is versatile and finds wide-ranging applications. It is commonly used in structural components such as beams, columns, and trusses in buildings and bridges. It is also used for manufacturing machinery, automotive parts, and general-purpose steel products.

Corrosion Resistance: While Q235 steel is not inherently corrosion-resistant, it can be protected from corrosion through coatings, such as paint or galvanizing. Galvanized Q235 steel, for example, is coated with a layer of zinc, providing enhanced corrosion resistance.

Q235 Hardness: Q235 steel has a moderate hardness, which contributes to its machinability. It can be easily cut, drilled, and machined using common tools and techniques.

Construction/Indutry/Building/Chemical/Auto

After hot-rolled the products shaped into coil and delivery as finished product, including round, square,rectangular, hexagonal and so on. Since most of the products are round, it is generally called wire rod. Carbon steel wire rod is widely used in construction and manufacturing. Carbon steel wire rod is mainly used for reinforcement of reinforced concrete and welded structure or reprocessed (roberts , nail, etc.) materials, especially used to produce wire drawing, welding electrode, nails, spring, electronic, precise machinery parts and so on.