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Q/BQB 670-2019: High-Hardness Protective Steel Plate Q/BQB 670-2019 BQB ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD High-Hardness Protective Steel Plate Issued by: Baoshan Iron and Steel Co., Ltd. Table of Contents 1 Chemical Compositions ... 3 2 Mechanical and Process Properties ... 4 3 Elasticity Resistance ... 4 4 Inspection and Testing ... 5 Main Technical Indicators and Test Methods (Public Statement) 1 Chemical Compositions
