BQ Plate SA 516 Gr 70 refers to a type of Boiler Quality (BQ) steel plate that meets the specifications of ASTM A516/A516M, Grade 70. Here's an overview: ASTM A516 Grade 70 - Type: Boiler Quality (BQ) steel plate - Grade: 70 - Standard: ASTM A516/A516M - Thickness: 1.25" to 4" (32 mm to 100 mm) - Width: Up to 120" (3048 mm) - Length: Up to 600" (15240 mm) Chemical Composition: - Carbon (C): 0.27% max - Manganese (Mn): 0.79% max - Phosphorus (P): 0.035% max - Sulfur (S): 0.035% max - Silicon (Si): 0.13% max - Chromium (Cr): 0.03% max - Molybdenum (Mo): 0.02% max Mechanical Properties: - Tensile Strength: 70, 000 psi (485 MPa) - Yield Strength: 38, 000 psi (262 MPa) - Elongation: 21% min (in 8 in or 200 mm) - Impact Test: -20°C (-4°F) Features: - Excellent notch toughness - Good weldability - High strength and durability - Resistance to corrosion and oxidation Applications: - Boilers and pressure vessels - Power generation and nuclear applications - Petrochemical and refining industries - Construction and heavy machinery Equivalent Grades: - ASME SA516 Gr 70 - DIN 17155 HII - EN 10028-2 P265GH - BS 1501 161 430A - IS 2041 R260 Manufacturers: - Tata Steel - Jindal Steel - SAIL (Steel Authority of India) - Essar Steel - and many others When ordering BQ Plate SA 516 Gr 70, ensure to specify the correct thickness, width, and length to meet your application requirements.