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Detailed explanation of SG295 steel
SG295 is a low-carbon structural steel that meets the JIS G3116 standard. It is widely used in the manufacture of welded gas cylinders for its excellent performance. It has high yield strength (minimum 295 MPa) and tensile strength (above 440 MPa), while maintaining good toughness and weldability. Its main feature is that it can withstand the storage requirements of high-pressure gas in medium and low pressure environments, while having good processing performance and impact resistance. Compared with SG255, SG295 has higher strength and is suitable for gas cylinder manufacturing with more stringent requirements.
The chemical composition of SG295 is reasonably designed to ensure the stability of its performance. The main components include carbon (C≤0.20%), silicon (Si≤0.35%), manganese (Mn≤1.00%), phosphorus (P≤0.040%), sulfur (S≤0.040%), and the rest is iron (Fe) and trace impurities. The low carbon content ensures that cracks are not easily generated during welding, while the low sulfur and phosphorus content improves the purity and toughness of the steel, making it perform well in a variety of environments.
In terms of size, SG295 is usually supplied in the form of hot-rolled steel plates, strips or coils. The thickness ranges from 1.5 mm to 20 mm, the width is generally between 1000 mm and 2500 mm, and the length can be customized according to requirements. This flexible specification makes it suitable for the manufacture of gas cylinders of different sizes. The delivery state is mainly hot-rolled (HR), and annealing can also be performed as required to optimize the internal structure, improve ductility and surface quality.
The application scope of SG295 is concentrated in the field of gas cylinder manufacturing, and it is often used to store liquefied petroleum gas (LPG), acetylene and other high-pressure gases. It is widely used in fields such as household gas cylinders, industrial gas containers and automobile fuel tanks. In addition, its high strength and welding performance also make it have certain applications in the manufacture of pressure vessels and storage tanks. With its economy and reliability, SG295 has become an indispensable material in the global gas cylinder industry, especially in scenarios where safety and cost need to be taken into account.