Jian-plate 460E-Z35 
 Q460E-Z35 (Lu 13373905727) is Wugang for the National Stadium (the main venue for the 2008 Olympic Games has attracted worldwide attention nest engineering) developed structural steel, has been steel construction, heavy use of high-rise buildings. And acceptance by the construction units and units and highly commended the Group of Experts. 
 Q460E (Lu 13373905727) steel technical conditions: "Bird's Nest steel major technical difficulties with the Q460E/Z35 
 Thicknesses exceeding the limit --GB/T1591 standard maximum thickness of steel plate Q460 100mm, "Bird's Nest steel maximum thickness of 110mm, more than the standard requirements. With the plate thickness increases, the compression ratio decreases as steel, rolled reduce the cooling rate after the system is not conducive to refined grains, steel strength, toughness is difficult to ensure. Wugang take a series of technical measures, breaking the GB/T1591 standard limits the thickness of 100mm, 110mm thick steel plate to meet the Q460E technical requirements. 
 High-strength steel to ensure their ability to support --GB/T1591 standards, Q460 steel is the highest intensity level. 
 -40 ℃ low temperature toughness to ensure that the fatigue performance of steel --GB/T1591 Standard, -40 ℃ low temperature impact toughness test temperature is the lowest rating. 
 Z35 performance of lamellar tearing resistance of steel structures to ensure safety standards --GB/T5313, Z35 is the highest resistance to lamellar tearing the level of performance. 
 Carbon steel welding performance guarantee equivalent - the big 110mm thickness in the case, 460MPa high strength steel welding carbon equivalent requirements of ≤ 0.50%, the actual supply requirements ≤ 0.48%. 
 Low yield ratio, high elongation to ensure the seismic performance of steel structures - "Bird's Nest steel technical conditions require Q460E/Z35 yield ratio ≤ 0.83, the elongation ≥ 20%, domestic and international standards in the elongation of 460MPa grade steel requirements are is ≥ 17%. 
 The same level, thickness, and technical requirements of steel production and use at home and abroad for the first time - Japan, the same level of production of the thickness of structural steel items, or Z are not so high performance, such as Germany Dillinger company comply with EN10113 Standard DILLIMAX460, the maximum thickness of 80mm, the yield ratio can only be guaranteed ≤ 0.88, elongation rate to ensure ≥ 17%; Japan's Nippon Steel production BT-HT440, the yield ratio and elongation, been able to meet the requirements, but its resistance to lamellar tearing only guaranteed Z25 performance requirements.