SA 275 JR is a type of steel plate that is commonly used in construction, engineering, and industrial applications. Here are some key properties and characteristics of SA 275 JR steel: - Grade: SA 275 JR - Material: Carbon Steel - Thickness: 4mm-150mm - Width: 1000mm-3000mm - Length: 3000mm-12000mm - Yield Strength: 275 MPa (min) - Tensile Strength: 430-580 MPa - Elongation: 20% (min) - Impact Test: -20°C (optional) - Heat Treatment: As rolled or normalized - Applications: - Construction equipment - Industrial machinery - Automotive parts - General engineering - Structural steel - Features: - Good strength and toughness - Good weldability and machinability - Good corrosion resistance - Affordable price SA 275 JR steel is known for its excellent strength, toughness, and weldability, making it a popular choice for various industrial applications. Note: SA 275 JR is a designation from the American Society of Mechanical Engineers (ASME), where: - SA = ASME standard - 275 = minimum yield strength (275 MPa) - JR = impact test at -20°C (optional) The exact composition and properties of SA 275 JR steel may vary depending on the specific standard or specification being followed.