★ Q345R container board basic information ★ Q345R steel plate in one category - container board grades that way: Q345R 16MnR 16MnG. For example: Q345R. Q- "Qu" Hanyu Pinyin first letter. 345- yield strength values. R: "content" pinyin first letter. According to September 1, 2008 implementation of the "GB 713-2008 boiler and pressure vessel steel plate," the new classification, 16Mng and 16MnR, 19Mng merged Q345R. Q345R ordinary low-alloy steel, boiler and pressure vessel is commonly used steel, delivery status points: hot or normalizing, is a low-alloy steel. Performance and Q345 (16Mn) in (16mm steel yield strength greater than 345Mpa) similar performance, tensile strength (510-640), with elongation greater than 21%, the impact energy is greater than zero V-34J. Q345R process reference standard GB713-2008. ★ Q345R note a container board must consider the equipment operating conditions (such as characteristics of the design pressure, design temperature, medium), the welding properties of the material, hot and cold processing performance, heat and structural problems ★ container and so on. Second, under the premise of meeting the first, consider the economic rationality: 1, the required plate thickness is less than 8mm, between carbon steel and low alloy high strength steel, carbon steel plate should be used (except for multi-vessel). 2, in the design of the main structure of the stiffness or the occasion, should try to use ordinary carbon steel. In the design of the main strength of the occasion should be used depending on the pressure, temperature, media and other restrictions, followed by selection of Q235B, 20R (20g), Q345R (16MnR) such as steel. 3, the required stainless steel thicker than 12mm, due in the form of structural lining, composite, welding and so on. 4, stainless steel should try not to make the design temperature is less than or equal to 500 degrees Celsius heat of steel. 5, pearlite heat resistant steel should try not to make the design temperature is less than equal to 350 degrees Celsius heat-resistant steel. When you must use pearlitic heat-resistant steel or heat-resistant steel for resistance to hydrogen use should be minimized, the merger of steel varieties and specifications. Three, of thickness greater than 60mm Q345R steel, the upper limit of the carbon content can be increased to 0.22%. Four, Q345R steel plate can be added niobium, vanadium, titanium, its content should fill in the quality certificate, the sum of the above three elements of content should be not more than 0.050%, respectively, 0.10%, 0.12%. ★ Q345R container board grades ★ chemical composition of chemical elements (mass fraction) /% C Si Mn Cr Ni Mo Nb VPS Alt Q345R ≤0.20 ≤0.55 1.20-1.60 ≤0.025 ≤0.015 ≥0.020 Als can replace Alt, should not be less than 0.015% ★ ★ mechanical properties of container board Q345R steel nominal thickness / mm tensile strength R / (N / m) yield strength R / (N / m) Elongation A /% temperature / ℃ shock absorbing energy KV2 / J 180 ° bending test bending diameter (b≥35mm) 3-16 510-640 ≥345 ≥21 0 ≥34 d = 2a> 16-36 500-630 ≥325 ≥21 0 ≥34 d = 3a> 36-60 490-620 ≥315 ≥21 0 ≥34 d = 3a> 60-100 490-620 ≥305 ≥20 0 ≥34 d = 3a> 100-150 480-610 ≥285 ≥20 0 ≥34 d = 3a