Surface heat treatment methods for EN 10025 S890QL1 high strength steel

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Normal strength shipbuilding structural steel is divided into four grades: A, B, C, and D. The yield strength (not less than 235N/mm^2) of EN 10025 S890QL1 high strength steel these four grades is the same as the tensile strength (400~520N/mm^2). However, the impact properties of steel plates at different temperatures are different.

As the thickness and hardness of EN 10025 S890QL1 high strength steel increase, the tendency to crack at the cutting edge increases. In order to prevent the EN 10025 S890QL1 high strength steel from cutting cracks, preheating should be carried out before EN 10025 S890QL1 high strength steel cutting. Special attention should be paid to preheating to make the entire EN 10025 S890QL1 high strength steel interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole EN 10025 S890QL1 high strength steel cannot be preheated, the partial preheating method can be used instead.

20# seamless steel pipe chemical composition: C: 0.07-0.23, Si: 0.17-0.37, Mn: 0.35-0.65, Cr: 0.25, Ni: 0.30, Cu: 0.25. 20# seamless steel pipe mechanical properties: recommended heat treatment temperature: 910℃, tensile strength: 410 MPa, yield strength: 245 MPa, elongation: 25%, impact energy is not required. 20# seamless steel pipe hardness is higher than 10# seamless steel pipe. EN 10025 S890QL1 high strength steel, 20# seamless steel pipe has good weldability, no temper brittleness, and its machinability can be improved by water quenching. 20# seamless steel pipe can be used to make welded components, as well as parts with small load after forging, hot stamping and cutting.

The company has our own truck fleet, and can transfer products flexibly and quickly. At the same time, we have large warehouses near the ports of Tianjin and Shanghai, so as to ensure that we can deliver high-quality products to customers in the first time. At the same time, it also greatly reduces the transportation cost, and realizes the double harvest of time benefit and economic benefit. Time guarantee is one of the important strengths of our service.

As leading EN10025-6 S460QL structural steel plates supplier in China, our company has supplied hundreds of thousands tons S460QL steel plates to clients to assist them finish one after another EN 10025 S890QL1 high strength steel magnificent projects.