What Is Q345 Carbon Steel Square Steel?
Find a supplier that can deliver the dimensions and shape of Q345 carbon steel square steel you need for your project. Ask for material certifications and third-party inspections to ensure that the product meets industry standards.
The tensile fracture morphology of Q345 steel at different tempering temperatures shows tough nests and tearing ribs. This makes it necessary to implement strict welding process measures.
Hardness
Q345 carbon steel square steel is an incredibly tough material that can withstand extreme conditions. It is often used for construction projects and industrial applications that require a high level of Q345 carbon steel square steel strength, ductility, and toughness. However, it is important to take precautionary measures when working with this material to avoid fire hazards and other safety risks.
The metallographic organization of Q345 steel is mainly ferrite and pearlite, with a small amount of mixed crystal organization. The structure is fine and granular, with an average grain size of 0.8-0.9 mm. The steel also has good plasticity and weldability. However, it has a low welding performance, so it is important to implement strict process measures during the welding process.
The yield strength and tensile strength of Q345 steel increase with the tempering temperature, reaching a maximum value at the tempering temperature of 400. The elongation after fracture and the shrinkage at section of this steel grade also increase with the tempering temperature.
The ductility of Q345 carbon steel square steel can be improved by adding V, Ti, and Nb microalloy elements. These additions help to refine the grains, enhance the toughness of the material, and improve its overall mechanical properties. In addition, these alloys also improve the corrosion resistance of the steel. Regular inspections of structures made of this material are important to detect any signs of damage or deterioration, and to prevent further deterioration.
Tensile Strength
Q345 steel is a low alloy high strength structural steel that carries the following grades:
Its tensile strength is rated at 470 to 630 megapascals, which is about 235,000 pounds per square inch. This is higher than the yield strength of A36 steel, which is about 100,000 pounds per square inch.
This high tensile strength means that this grade of steel can take a lot of strain before it fails. It is also much more ductile than A36, which makes it better suited for applications that require bending and shaping.
In addition to its high tensile strength, this grade of steel is also very resistant to corrosion. This makes it ideal for use in construction Industrial carbon steel angle steel projects that require welding, as the welds will not weaken the structure.
The tensile strength of this steel can be increased by heat treatment. This process involves increasing the temperature of the steel until it reaches its tempered state. This increases the tensile strength of the steel, while lowering its hardness and impact strength. The elongation at failure of this grade of steel is also reduced by heat treatment. This is important for improving weldability and making it easier to work with. This is a crucial factor in construction, especially for bridges and ships. In addition, this steel is very affordable and environmentally friendly.
Impact Strength
Q345 carbon steel square steel is a low alloy structural steel, widely used in bridges, vehicles, ships, buildings and pressure vessels. It has good comprehensive mechanical properties, acceptable low temperature performance, and good plasticity and weldability. It can be used as structures, mechanical parts and building structure bearing dynamic load for medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations and bridges. It can be used in rolling or normalizing state in cold areas below -40°C.
The impact strength of Q345 steel can be improved by tempering at lower temperatures. When tempered at 200-600°C, the tensile fracture morphology of Q345 steel plate showed ductile characteristics. The impact fracture morphology of Q345 steel tempered at 600 and 680°C also exhibited ductile characteristics.
The impact strength of Q345 steel can also be enhanced by improving its weldability and forming characteristics. This is achieved by increasing its carbon content, decreasing its sulphur content and adopting a high-quality welding process. Additionally, strict welding process measures should be formulated to prevent corrosion of the welding seam. These methods can improve the quality of welded structures, which can help reduce the number of welding defects and ensure the one-time qualification rate for construction projects. These welding process measures can also save material and reduce the cost of construction. In addition, they can also improve the safety and reliability of the structures.
Corrosion Resistance
The corrosion resistance of Q345 carbon steel square steel is very good, but it is not as high as stainless steel. It can withstand most environmental conditions, including salt and acid. It is also able to resist high temperatures and strong loads. This makes it suitable for a variety of applications, including construction projects.
The strength of Q345 carbon steel is higher than that of standard Q235, making it a good choice for construction projects. However, it is important to know how much stress the material can withstand before reaching its yield strength. The higher the yield strength, the stronger the material will be.
A higher yield strength means that the steel will be more resistant to deformation, which is useful in engineering applications. The tensile strength of Q345 steel is also high, making it an excellent choice for heavy loads and structural stability.
This low-alloy high-strength structural steel is used in construction, bridges, and other structures. It has good weldability, cold and hot forming properties, and moderate toughness. It is not as corrosion-resistant as stainless steel, but it is a cost-effective option for many applications.
