Q420q steel material is a kind of structural steel plate for bridges, the grades are Q420qD, Q420qE, Q420qF.Q420q steel chemical composition: C: ≤0.11, Si: ≤0.55, Mn: 1.0-1.7, Nb: 0.01-0.09, V: 0.01-0.08, Ti: 0.006-0.03, Cr: ≤0.50, Ni: ≤0.30, Cu: ≤0.30, N : ≤0.008, Al: 0.01-0.045.Steel delivery status: delivered in the thermomechanical rolling state, and the steel plate should be trimmed for delivery.
The company is a leading company that sells A588 Gr B HSLA steel plate steel plate products in the Central Plains region and has a high reputation in the steel plate industry. Since its establishment, the company has always adhered to the business philosophy of "integrity cooperation and common development", and has sold A588 Gr B HSLA steel plate steel products with various materials. The products are widely used in petroleum, chemical, construction, boiler, decoration, offshore operations, electric heating, gravity machinery and other industries.
As the thickness and hardness of A588 Gr B HSLA steel plate increase, the tendency to crack at the cutting edge increases. In order to prevent the A588 Gr B HSLA steel plate from cutting cracks, preheating should be carried out before A588 Gr B HSLA steel plate cutting. Special attention should be paid to preheating to make the entire A588 Gr B HSLA steel plate interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole A588 Gr B HSLA steel plate cannot be preheated, the partial preheating method can be used instead.
The characteristic of niobium in A588 Gr B HSLA steel plate etc. steel material is to increase the recrystallization temperature of austenite, so as to achieve the purpose of refining austenite grains. In general, the amount of niobium added in steel material is less than 0.05%, and the contribution of niobium above 0.05% to strengthening and toughening will no longer be obvious.
The company adopts one-to-one fast service and has formed a professional after-sales service team to deal with various problems reflected by customers as soon as possible. At the same time, a traceable product traceability system has been established. It has always been placed at an important core position to resolve customer worries. Our steel A588 Gr B HSLA steel plate products are always committed to “quality issues, life-long replacement”, which is the embodiment of our comprehensive service.
