Heat treatment process and purpose of p265gh steel tube

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The weldability of P265GH steel tube is good. It means that under certain process and construction conditions, p265gh steel tube can obtain good performance after welding. Weldability is a measure of the hot workability of steel. Weldability can be divided into weldability in construction and weldability in use. Weldability in construction refers to the sensitivity of cracking in weld metal and near seam zone, and hardening sensitivity of steel in near seam zone. Good weldability means that under certain welding process conditions, the weld metal and steel near the seam do not produce cracks. Weldability in use means that the mechanical properties of weld and HAZ steel are not lower than those of base metal.

The executive standard of 18MnMo4-5 steel plate: EN10028-2. This European standard specifies the requirements of non alloy steel and alloy steel flat products for pressure vessels with weldable high temperature performance.Delivery state of p265gh steel tube, 18MnMo4-5 steel plate: the steel plate is usually delivered in the state of normalizing + tempering (n + T) or quenching and tempering (QT).

Large-thickness p265gh steel tube, Z35 grade steel plate is a kind of extra-thick steel plate that is applied under specific environmental conditions, such as the key parts such as the turbine seat ring and guide vane of the generator set. It has high requirements for safety, reliability, and long service life. Develop 200mm-300mm thick steel plate of Z35 level, to ensure that the layer tear resistance reaches Z35 level. 300mm thick Z35 grade steel plate can be used not only in the hydropower industry, but also in the manufacture of other large key equipment, and has broad prospects.

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