Q345B steel is a high-quality low-alloy structural steel with excellent comprehensive performance, widely used in many fields, including CNC machining prototype making and customized sheet metal prototype fabrication industries.
Chemical composition and mechanical properties:
The main chemical components of Q345B steel include elements such as carbon (C), silicon (Si), manganese (Mn), etc. Its specific chemical composition is as follows:
Carbon (C): ≤ 0.20%
Silicon (Si): ≤ 0.55%
Manganese (Mn): ≤ 1.7%
Phosphorus (P): ≤ 0.040%
Sulfur (S): ≤ 0.040%
Vanadium (V): 0.02~0.15%
These components collectively endow Q345B steel with excellent mechanical properties. Its yield strength is 345MPa, and its tensile strength is usually between 470-630MPa. It has good elongation and impact toughness and can effectively resist impact loads at room temperature.
Physical and process performance:
Q345B steel has good welding performance, which can blend well with the welding material during the welding process, forming a firm welding joint, and is not prone to defects such as welding cracks or pores. In addition, its anti-corrosion performance is also excellent, and it can be used for a long time in general industrial and atmospheric environments.
Application area:
Q345B steel is widely used in fields such as bridges, vehicles, ships, construction, and pressure vessels. Due to its excellent comprehensive performance, it is particularly suitable for structures and mechanical parts that can withstand dynamic loads, such as cranes, mining machinery, power plants, and building structures.
Metalstar Prototype has been deeply involved in the field of prototype processing for many years. With years of experience in raw material procurement and use, we can provide customers with a wide range of metal raw material options for CNC machining process and sheet metal prototype fabrication.
