Q690 Steel, Q690C Q690D Q690E Chemical Composition q690c steel chemical composition
Dec 08, 2019 · Q690 Steel, Q690C Q690D Q690E Chemical Composition, Mechanical Properties. Q690 steel and Q690M material is a Chinese GB standard high strength low alloy structural steel, and devides into 3 quality grades Q690C, Q690D and Q690E, Q means Yield Strength, 690 refers to 690 Mpa, Tensile Strength is 770-940 Mpa, M is short for TMCP (Thermal Mechanical Control
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