Why SG325 Steel is a Star Material for Gas Cylinders?

JIS G 3116 SG325 steel is a standout material in the gas cylinder industry, celebrated for its exceptional strength, weldability, and reliability. Designed to meet the Japanese Industrial Standard (JIS G 3116), SG325 is a low-alloy steel tailored for welded cylinders that store high-pressure gases like propane, butane, and LPG, making it a top choice for energy, chemical, and industrial applications.

With a minimum yield strength of 325 MPa and tensile strength of 490–620 MPa, SG325 steel ensures structural integrity under high-pressure conditions. Its chemical composition, featuring low carbon (≤0.20%), manganese (≤1.50%), and controlled phosphorus (≤0.040%), provides excellent toughness and resistance to brittle fracture, ensuring safety. The alloy’s corrosion resistance protects cylinders from environmental degradation, enhancing durability.

SG325 steel superior weldability enables seamless fabrication using techniques like gas metal arc welding (GMAW) or submerged arc welding (SAW), producing robust, leak-proof cylinders. Its formability supports precise shaping, meeting diverse design needs. Supplied as hot-rolled coils or plates with thicknesses of 1.6–6 mm and widths up to 2000 mm, SG325 steel offers flexibility with customizable surface treatments like pickling.

Certified to JIS G 3116, SG325 steel meets stringent safety and quality standards, offering cost-effective performance for manufacturers. Its combination of strength, toughness, and corrosion resistance makes SG325 steel a star material, ensuring safe, durable gas cylinders that excel in demanding environments and drive industry trust.