JIS G3103 SB480M is a kind of steel plate used for boilers and pressure vessels, which is specified under the Japanese Industrial Standards (JIS). This grade of steel plate is designed to provide excellent performance in high-temperature environments and is commonly used in the fabrication of pressure equipment that requires high strength and good weldability.
Chemical Composition:
The chemical composition of JIS G3103 SB480M is strictly controlled to ensure the material's mechanical properties and weldability. The typical chemical composition is as follows:
· Carbon (C): 0.12-0.20%
· Silicon (Si): 0.15-0.35%
· Manganese (Mn): 0.90-1.50%
· Phosphorus (P): ≤ 0.030%
· Sulfur (S): ≤ 0.030%
· Nickel (Ni): ≤ 0.30%
· Chromium (Cr): 0.05-0.30%
· Molybdenum (Mo): ≤ 0.08%
· Copper (Cu): ≤ 0.30%
· Niobium (Nb): ≤ 0.020%
· Vanadium (V): ≤ 0.020%
· Boron (B): ≤ 0.004%
Mechanical Properties:
The mechanical properties of SB480M steel plate are crucial for its application in pressure vessels and boilers. The following are the typical mechanical properties:
· Tensile Strength: 490-610 MPa
· Yield Strength: ≥ 295 MPa
· Elongation: ≥ 22%
· Impact Energy (Charpy V-notch test at 0°C): ≥ 27J
Heat Treatment:
The steel plates are normally supplied in the normalized condition. Normalizing involves heating the steel to a temperature above its critical point and then cooling it in air. This process refines the grain structure and improves the mechanical properties of the steel.
Low-Temperature Impact Test:
SB480M steel plates are subjected to a low-temperature impact test to ensure their toughness and resistance to brittle fracture at low temperatures. The standard Charpy V-notch test is conducted at 0°C, with a minimum impact energy of 27J.
Main Applications:
Due to its excellent mechanical properties and resistance to high-temperature environments, SB480M steel plate is widely used in the following applications:
· Boilers
· Pressure vessels
· Heat exchangers
· Steam drums
· Pressure piping
