1 special structural steel, pressure vessel steel plate: with a capital R in grades tail, said the grade is available yield point can also be carbon or alloy containing element. Such as: Q345R, Q345 as the yield point. Another example: 20R, 16MnR, 15MnVR, 15MnVNR, 8MnMoNbR, MnNiMoNbR, 15CrMoR etc. with carbon or alloy containing elements represented; 2, welding gas cylinder steel plate: HP capitalized at the end of grades, said the grade can yield dots, such as: Q295HP, Q345HP; alloying elements may also be included to represent, Bengbu steel, such as: 16MnREHP. Almost all of the dissolved iron alloy elements (except Pb) can be dissolved iron to form an alloy ferritic or austenitic alloy, according to α-Fe or γ-Fe role, alloying elements can be divided In order to expand and refine the austenite phase region austenite region into two categories. Expanding element γ-phase region - also known as austenite stabilizing elements, primarily Mn, Ni, Co, C, N, Cu, etc., which make A3 point (transition point γ-Fe α-Fe) is decreased, steel q235 , A4 point (transition point γ-Fe) is increased, thereby expanding the range of the presence of γ- phase. After which Ni, Mn, etc. is added to a certain amount, a steel plate 20, the phase γ region can be extended to below room temperature, so that α phase region disappears completely expand γ phase region called elements. Other elements (e.g., C, N, Cu, etc.), although the expansion of γ-phase region, but can not be expanded to ambient temperature, so called partial enlarged element γ-phase region. Bengbu steel | q235c steel | Fair Commerce Bo (high-quality businesses) are provided by the Hefei exhibition Bo Trading Company. Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) in this field pipe poured boundless enthusiasm and passion, exhibition of Commerce Bo has been customer-centric, to create value for customers in the concept, in order to quality, service to win the market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Mr. Huang.