4 inch plate S690QL material density stock

For S690QL material density buyers, the impact of the rise and fall of S690QL material density prices is great. Because of the large amount of S690QL material density purchases and the large amount of funds involved, many S690QL material density purchasers will carefully consider the price issue, and some S690QL material density purchasers who are far away will also consider the freight issue. When the price of S690QL material density overall drops, a large number of S690QL material density buyers will hoard in large quantities. When S690QL material density prices rise, we should predict and stock up appropriately.

A514 grade J quenched and tempered alloy steel chemical composition (melting analysis)%C: 0.12-0.21, Si: 0.20-0.35, Mn: 0.45-0.70, P max.: 0.035, S max.: 0.035, Mo: 0.50-0.65, B: 0.001-0.005The mechanical properties in thickness (mm)T≤65Yield strength (≥Mpa): 690Tensile strength (Mpa):760-895Elongation in ≥, %: 18

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Vanadium element (V element) can refine grains in ordinary low carbon alloy steel, improve the strength and yield ratio and low temperature characteristics after normalizing, and improve the welding performance of steel, S690QL material density included. Vanadium element (V element) is often used in combination with manganese, chromium, molybdenum, tungsten and other elements in structural steel because of its low hardenability under general heat treatment conditions. Vanadium in quenched and tempered steel is mainly to improve the strength and yield ratio of steel, refine the grain size, and pick up the overheating sensitivity.