| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.6 ( September 1982 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Production of 9% Ni Steel Plates for Liquefied Natural Gas Tanks
Shigeharu Suzuki, Yoshifumi Nakano, Keisuke Hirose, Taketo Okumura, Hiroshi Nishikawa, Mineo Sato |
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Synopsis : Along with the continuous increase in the size of LNG tanks, high toughness at low temperatures has been required of the main structural steels or 9% Ni steels in order to ensure the safety of tanks. Kawasaki Steel has successfully improved the products of 9% Ni steels with respect of fracture toughness at low temperatures and supplied 3000 tons of steel plates for the 80000 kl LNG tanks at Chita LNG Receiving Terminal. The present paper describes the properties of the 9% Ni steels produced recently and the main controlling items in the production. As a result of lowering phosphorus and sulfur contents and the strict control of e production line, the properties, especially the toughness at low temperatures, of the 9% Ni steel plates were much improved compared with those produced in the past. the properties of welded joints and fracture toughness showed that the 9% Ni steel plates are suited for the structural material of LNG tanks. |
| TextiPDF: 14p./449kbj |