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q420a steel chemical composition

Description: Q420 Steel Chemical Composition, Properties Q420 Steel Introduction. Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa, parameters are tested with 16mm diameter steel bars or steel plates, and tensile strength is 520680 Mpa, the material density is 7.85 g/cm3. According to GB/T 15912008, Q420 has 5 quality levels: Q420A, Q420B, Q420C, Q420D and Q420E.

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