ASTM A106gr. B seamless steel tube is a kind of low carbon steel widely used in petroleum, chemical and boiler industries.The material has good mechanical properties.A106gr. B pipe is equivalent to China's 20# steel, the implementation of ASTM A106 high temperature seamless carbon steel nominal pipe standard, grade B.The limit service temperature of A106B is 425℃.

Seamless steel pipe is hollow section, a large number of used for conveying fluid pipe, steel pipe and round steel, compared to solid steel in the bending torsional strength phase at the same time, the weight is lighter, is a kind of economic cross section steel, widely used in the manufacture of structural and mechanical parts, such as petroleum drill pipe, auto transmission shaft, bicycle frame and construction of steel scaffolding is used.The general use of seamless steel pipe to ensure the strength and flattening test.Hot rolled steel pipes are delivered in hot rolled or heat treated state;Cold rolled delivery in heat treated condition.Hot rolling, as the name implies, the temperature of rolled pieces is high, so the deformation resistance is small, and large amount of deformation can be achieved.Taking steel plate rolling as an example, the thickness of continuous casting billet is generally about 230mm, and after rough rolling and fine rolling, the final thickness is 1~20mm.At the same time, because of the steel plate width to thickness ratio is small, the size accuracy is relatively low, not easy to appear the shape problem, mainly to control the crown.For the requirements of the structure, generally through the control of rolling and cooling, that is, to control the fine rolling of the opening temperature, final rolling temperature and crimp temperature to control the microstructure and mechanical properties of the strip.