Still has good welding properties.

  Marine steel building components: In recent years, with the oil industry, coastal structures also used polar and deep sea areas. As the intensity increased and the thickness increases, the plate must be met for the coastal -40 ℃ under the CTOD values ??drop test

Zero-brittle transition temperature lower than -85 ℃ TNDT to ensure adequate fracture toughness and resistance to crack growth.

    Initially used in cold regions of Japan Energy Development of large heat input welding thick steel plates for the YP360MPa structure, the maximum thickness of 70mm, can withstand 130kJ/cm line energy. Meet the needs of higher intensity, by controlling the Ceq and Pcm, lower C,

N, Si and P components, and processing and control of REM-Ti Ti / N ratio, and use of controlled rolling and accelerated cooling process (MACS), developed in Japan and 101.2mm of YP420 75mm thick steel plate. The addition of 1.1% Ni, low temperature toughness of these plates
external battery pack
Not bad.

    Weathering steel for bridge: the bridge now requires a lot of welding. Kawasaki Steel Corporation of Japan organized control technology developed by ultra-low carbon bainitic weathering steel SMA570WTMC, steel,  added Ni, Cu, Cr, Mo and P alloying elements, carbon

About 0.02%. Mn by adjusting the amount of strength is divided into three grades according to: 400MPa class, 490MPa and 570MPa grade level, steel plate thickness 25 ~ 75mm. In 200kJ/cm HAZ under the conditions of heat input impact energy than 47J. With these weathering steel bridge

Do not paint, reducing manufacturing and maintenance costs.

    In addition, Kawasaki has developed a non-heat 800MPa class high toughness ULCB bars to replace the traditional quenched and tempered steel AISI417 3 for automotive and industrial equipment in the field. Organization of the steel after rolling bainitic ferrite (αB), Qu

Stronger than 85%. Using Cu dispersion strengthening, improving the wear resistance of steel.

    Building Structures: The JFEEWEL technology developed in Japan, including SA440-E, including a series of high-toughness structural steel, formed from 490MPa to 590MPa range of structural steel. Strict control of the use of ACR technology Ti, N content,

60mm and 100mm thick to produce the SA440-E plate, the tensile  strength of 590-740MPa, yield strength of about 460MPa. In 630kJ/cm submerged arc welding and electroslag welding conditions 1000kJ/cm, HAZ no significant coarsening of the weld metal structure of fine needle