Q235 is a carbon structural steel that is widely used in China and other countries due to its excellent mechanical properties and low price. It is equivalent to A36 in the United States and S235JR in Europe. Q235 steel has good toughness, plasticity, and weldability, making it suitable for a variety of applications in construction, machinery manufacturing, transportation, and other industries. In this blog post, we will explore the Q235 standard and its properties in more detail.

The Q235 steel standard specifies the chemical composition of the material, which is based on the following elements: carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and trace elements such as copper (Cu) and nickel (Ni). The carbon content of Q235 steel is typically between 0.12% and 0.20%, while the manganese content is between 0.30% and 0.70%. The silicon content is less than or equal to 0.30%, and the sulfur and phosphorus content are both less than or equal to 0.045%.

The mechanical properties of Q235 steel are also defined by the standard, which specifies the tensile strength, yield strength, elongation, and impact strength of the material. The tensile strength of Q235 steel is typically between 375 and 500 MPa, while the yield strength is between 235 and 345 MPa. The elongation of Q235 steel is typically between 26% and 36%, depending on the thickness of the material. The impact strength of Q235 steel is typically between 27 and 34 Joules at room temperature.

Q235 steel is widely used in a variety of applications due to its excellent mechanical properties and low cost. It is commonly used in construction, such as for building frames, bridges, and other structures. It is also used in machinery manufacturing, such as for making machine parts and equipment. Additionally, Q235 steel is used in the transportation industry for making rail tracks, ships, and other vehicles.

In conclusion, Q235 is a widely used carbon structural steel standard in China and other countries due to its excellent mechanical properties and low price. The standard specifies the chemical composition, mechanical properties, and applications of the material, making it a reliable choice for a variety of industries. If you are looking for a cost-effective and durable material for your next project, Q235 steel may be a great option to consider.