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Q/BQB 516-2019: Spring steel wire rod Q/BQB 516-2019 ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD Replacing Q/BQB 516-2018 Spring Steel Wire Rod Table of Contents 1 Chemical Compositions ... 3 2 Mechanical Properties ... 3 3 Inspection and Test ... 4 Main Technical Indicators and Test Methods (Public Statement) 1 Chemical Compositions Table 1 2 Mechanical Properties Designation Chemical compositions (mass fraction)
