SG325 is a specific grade of steel that refers to a high-pressure gas cylinder steel plate. Here is the chemical composition, standards, and properties associated with SG325:
Chemical Composition (in weight percentage):
Carbon (C): 0.20% max
Silicon (Si): 0.55% max
Manganese (Mn): 1.50% max
Phosphorus (P): 0.040% max
Sulfur (S): 0.040% max
Aluminum (Al): 0.015% min
Standards: SG325 steel is commonly regulated by the following standards:
JIS G3116: Japanese Industrial Standard for hot-rolled steel plates, sheets, strips for gas cylinders.
Properties:
Yield Strength: ≥ 325 MPa (min)
Tensile Strength: 490-600 MPa
Elongation: ≥ 22% (L0 = 50 mm, Lc = 200 mm)
These properties make SG325 suitable for manufacturing high-pressure gas cylinders used for storing liquefied petroleum gas (LPG) or other gases. The specified chemical composition and mechanical properties ensure the steel's strength, formability, and resistance to cracking under pressure.
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