p295gh equivalent grades is required to have high toughness

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The characteristic of niobium in P295GH equivalent grades 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.

ASTM A299 (Grade A and B) steel is a manganese-silicon carbon steel plates for use in welded boilers and other pressure vessels. Yield and tensile strength of A299 Gr. B is higher than A299 Gr. A. Due to high composition of C, Mn, Si. ASTM A299 boiler steel plate is widely used for manufacturing pressure and boiler equipment. ASTM A299 boiler steel plates of this standard under this thickness of 50 mm are normally supplied in as-rolled condition.

If it is 6 mm p295gh equivalent grades low carbon steel plate, when laser cutting, about 19 yuan per meter. 10 mm low carbon steel plate to do laser cutting, the price of one meter is about 15 yuan. If the p295gh equivalent grades steel plate is 12 mm, the price of one meter is about 15 yuan.

Advantages of hot rolling: hot rolling can destroy the casting structure of ingot, refine the grain of steel and eliminate the defects of microstructure, so that the steel structure is dense and the mechanical properties are improved. This improvement is mainly reflected in the rolling direction, so that the p295gh equivalent grades steel is no longer isotropic to some extent; the bubbles, cracks and looseness formed during pouring can also be welded under the action of high temperature and pressure.