SA516Gr70 is one of the six new products developed in Wugang in 2006. The steel plate meets the technical requirements of the NACE-MR0175 oilfield equipment for resisting sulfide stress cracking and metal materials, and has passed the HIC+SSC test. The steel plate is the first in China and internationally advanced. A516Gr70N meets the requirements of (ASME) AS***516/A516M standard, and satisfies the needs of high sulfur and hydrogen oil gas, reduces the corrosion of sulfur and hydrogen, reduces the overhaul of equipment and increases the service life of equipment. The plate has the characteristics: good anti i***ct performance, small deformation temperature, good welding performance, anti fatigue performance, lamellar tearing resistance, micro alloying, high purity, low carbon equivalent hydrogen sulfur resistant ability, products with good surface quality and dimensional tolerances, currently available for thickness below 200mm steel plate. Domestic requirements are generally SA516Gr70, SA516Gr60 less, because its performance is more common, domestic SA516Gr70, has now been widely used in major chemical sites,
Sa516gr70n
Normalizing condition is one of the delivery conditions of steel, that is, the steel is treated by positive heat before leaving the factory
Sa516gr70n
Because the normalizing heating temperature is more strict than that of the hot rolling termination temperature, the microstructure and properties of the steel are uniform. Co***red with the annealed steel, because of normalizing the cooling speed and the number of pearlitic steel tissue increased, pearlite lamellar and steel grain refinement, which have higher comprehensive mechanical properties, and is conducive to the improvement of network cementite shaped low carbon steel structure and hypereutectoid steel, can organize well prepared for further heat finished processing. Carbon - bound steel and bonded steel are normally delivered by normalizing. Some low-alloy high strength steels, such as 14MnMoVBRE and 14CrMnMoVB steels, are required t |
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