European standard container board SA516GR70 imported container board SA516Gr.70 belong to the low-temperature pressure vessel steel plate execution ASME standards. To meet the different requirements of users, ease of production management for grades S, P requirements are divided into Ⅰ, Ⅱ, Ⅲ three levels. Standard: American ASTM, ASME standard grades as well: SA515Gr60, SA515Gr70, SA516Gr60, SA516Gr70, SA516Gr60N, SA516Gr70N 2 chemical composition C≤0.30, Mn: 0.79-1.30, P≤0.035, S: ≤0.035, Si: 0.13-0.45 . 3 SA516Gr70 tensile mechanical properties of 70 one thousand pounds / square inch, that is usually referred to more than 482 people. The main element content is C Mn Si, p, s control to determine its performance. Very little other trace elements. American Materials Inspection Association standards, low carbon steel plates for pressure vessels Standard Specification Standard: American ASTM, ASME Standard: This standard is mainly used to improve the notch toughness is important welding pressure vessel steel plate. Intensity level level US (SI) 55 (380) Tensile Strength ksi (MPa) 55-75 (380-515) level US (SI) 60 (415) Tensile Strength ksi (MPa) 60-80 (415-550) level US (SI) 65 (450) Tensile Strength ksi (MPa) 65-85 (450-585) level US (SI) 70 (485) Tensile Strength ksi (MPa) 70-90 (485-620) heat 1 . · SA515Gr60, SA515Gr70, SA516Gr60, SA516Gr70, SA516Gr60N, SA516Gr70N thickness ≤1.5in, (40mm) rolled steel is usually supplied in the state, steel can also be normalized or eliminate stress, stress relieving or normalizing orders. 2. thickness> 1.5in. (40mm) should be normalized steel. 3. Unless otherwise specified by the demand side, the thickness ≤1.5in, (40mm) steel, when notch toughness requirements, should be normalized. 4. If approved by the demand side, allowing the use of larger than the cooling rate in air to improve the toughness, but as long as the steel sheet then 1100-1300 ° F (595-705 ℃) within the range of tempering. 4 specifications set tie Size: Industrial Co., Ltd. Shanghai Bao vertical thickness 8mm-200mm 5 parameters SA516Gr.70: HlC performance Rm Rp0.2 A -30 ℃ AKV Lateral J ￥ z hardness Thickness (mm) MPa MPa%% HB standard 450- 585 ≥230 ≥23 ≥34 ≥35 ≤200> 8-40 476-530 307-350 27-36 108-289 66-75 143-155 measured> 90-165 475-540312-369 31-3891-256 45-68.5 163-187 Note: The tensile specimens simulated weld heat treatment system: 620 + 10 ℃ -5 ° CX24h: the impact of post-weld heat treatment system simulation sample: 620 + 10 ℃ -5 ° CX24h: the hardness of delivery state (2) sampling location cracks batch (batch) is at the head of the thickness of 1/2 mm thickness steel crack-free implementation of the standard batch (batch) test batch (batch) SA516Gr70 (HIC) NACETM0284 B solution 8-165 0 56 56 SA516Gr70 (HIC) NACETM0284 A solution 8-16501051056 application SA516Gr.70 widely used in petroleum, chemical, power plants, boilers and other industries for the production reactors, heat exchangers, separators, tank, gas tank, gas tank, nuclear reactor pressure vessel, boiler drum, liquefied petroleum gas cylinders, high pressure pipe hydropower, water wheels volute and other equipment and components. 7 Development A516Gr70N accord (ASME) ASTMA516 / A516M standard requirements, and complete required to meet the needs of high levels of sulfur and hydrogen gas oil, to reduce sulfur and hydrogen corrosion, reduce equipment maintenance and increase the life of the equipment. The steel having characteristics: good impact resistance, low temperature deformation, good weldability, good fatigue resistance, good anti-cracking performance layered Caesar, micro-alloyed, high purity, low carbon equivalent, strong anti-hydrogen sulfide, The product has good dimensional tolerances and surface quality.