Open flat Q235 Q345 specifications, reasonable prices! Integrity management, quality assurance. Xinlong steel inquire 0512-65086995 13382509806 15950991968 complete specifications: 1.51 * 6 * 10,2 * 20,2 * 8 * 8 * 8 * 14,2 * 12,2 * 16,2 * 8 * 8 * 18,1.51 * 6 * 6 * 3.5,1.51 2.5,1.51 * * * 6 * 6 * 4.5,1.51 5.5,1.51 9.75,1.51 * * 6 * 6 * 6 * * 6.5,1.51 8.75,1.51 7.5,1.51 * 6 * 6 * * 7.75,1.51 * 6 * 6 * 9.5,1.51 8.5,1.51 * * * 6 * 6 * 6.75,1.51 5.75,1.51 4.75,1.51 * * 6 * 6 * 6 * 2.75 * 3.75,1.51 basic information Q235B carbon element content C: 0.17 ~ 0.22% Si Si: ≤0.35% Mn Mn: 0.3 ~ 0.7% sulfur S: ≤0.045% P P: ≤0.045% chromium Cr: to allow the residual content of ≤0.030% Ni: to allow the residual copper content ≤0.030% Cu: to allow the residual content of ≤0.030% Note: deoxy method: F, b, Z Q235B a certain elongation, strength, good toughness and casting, easy stamping and welding, widely used in the manufacture of general machinery parts. Mainly used for construction, the bridge project a higher quality welded structure. Q235A and Q235B difference: the steel are the property of carbon steel. In the national standard GB700-88 in Q235A and Q235B material to differentiate primarily in terms of the carbon content of steel, the material is a material Q235A carbon content between 0.14-0.22%; Q235B material not impact test, but do normal impact test, V-notch. Relatively speaking, the material is Q235B mechanical properties of steel is much better than the material is Q235A steel. In general, the steel factory before the finished profiles are made on the identification plate logo. Users can determine the material on the signage is Q235A, or Q235B, or other material. Design pressure P≤1.6MPa; temperature is 0 ~ 350 ℃; plate thickness> = 20mm ① digital quality rating symbols from the Q-deoxy method symbols. Its steel dubbed "Q", the representative of the yield point of steel, behind the numbers indicate the yield point value, the unit is MPa yield point such as Q235 (σs) of 235 MPa of carbon steel. ② when necessary, can be marked symbols representing steel quality level and deoxygenation methods. Quality rating symbols are A, B, C, D. Deoxy method symbols: F indicates boiling steel; b represents a half-killed steel; Z represents killed steel; TZ represents special killed steel, killed steel may mark symbol, Z and TZ can not marked. For example Q235-AF represents A-level boiling steel. ③ special purpose carbon steel, such as bridge steel, marine steel, basically carbon structural steel representation, but showing the use of steel last additional letters