Crafting Safe Gas Cylinders with JIS G 3116 SG325 Steel

JIS G 3116 SG325 steel is a high-strength, low-alloy material specifically designed for manufacturing safe and reliable welded gas cylinders. Compliant with the Japanese Industrial Standard (JIS G 3116), SG325 is ideal for storing and transporting high-pressure gases like propane, butane, and LPG, widely used in energy, chemical, and industrial sectors.

SG325 boasts a minimum yield strength of 325 MPa and tensile strength of 490–620 MPa, ensuring structural integrity under high-pressure conditions. Its chemical composition, with low carbon (≤0.20%), manganese (≤1.50%), and controlled phosphorus (≤0.040%), provides excellent toughness and resistance to brittle fracture, critical for gas cylinder safety. The steel’s corrosion resistance extends service life, even in challenging environments.

The alloy’s superior weldability supports efficient fabrication using methods like gas metal arc welding (GMAW) or submerged arc welding (SAW), ensuring strong, leak-proof seams. Its formability allows precise shaping into cylindrical forms, meeting stringent design requirements. JIS G 3116 SG325 steel is typically supplied as hot-rolled coils, with thicknesses ranging from 1.6 mm to 6 mm and widths up to 2000 mm, customizable to specific needs. Surface treatments like pickling enhance durability.

Certified to JIS G 3116 SG325 steel meets rigorous safety and quality standards, making it a trusted choice for gas cylinder production. Its combination of strength, weldability, and reliability ensures safe storage and transportation of gases, offering manufacturers a cost-effective solution for high-performance cylinders in demanding applications.