SA 387 Gr 9 is a type of steel plate that is commonly used in high-temperature applications, such as boilers, pressure vessels, and heat exchangers. Here are some key properties and characteristics of SA 387 Gr 9 steel: # Key Properties - Grade: SA 387 Gr 9 - Material: Chromium-Molybdenum Steel - Thickness: 4mm-150mm - Width: 1000mm-3000mm - Length: 3000mm-12000mm - Yield Strength: 240 MPa (min) - Tensile Strength: 515-690 MPa - Elongation: 18% (min) - Impact Test: -20°C (optional) - Heat Treatment: Normalized and Tempered # Characteristics - High-temperature resistance - Good strength and toughness - Good weldability and machinability - Good corrosion resistance - Affordable price # Applications - Boilers - Pressure vessels - Heat exchangers - Power generation equipment - Petrochemical equipment Note: SA 387 Gr 9 is a designation from the American Society of Mechanical Engineers (ASME), and it is equivalent to other international steel standards such as ASTM A387 Gr 9 and EN 10028 P9. SA 387 Gr 9 is similar to SA 387 Gr 5, but with a higher chromium content, which provides better corrosion resistance and high-temperature properties.