First, 06Ni9DR material profile:
06Ni9DR is -196 DEG C level low temperature pressure vessel steel plate. With its excellent low temperature impact resistance, and extremely low thermal deformation coefficient, it is widely used in LNG ships, and LNG storage and transportation engineering. The same series of grade 08Ni3DR (3.5 Ni), 08Ni5DR (5 Ni), and 06ni9dr (commonly known as the 9 nickel steel).
Two, 06Ni9DR material: 06Ni9DR chemical composition, 06Ni9DR mechanical properties
Steel 06Ni9DR 06Ni9DR cryogenic vessel, generally called the 9Ni or 9 nickel steel, corresponding to the foreign brands are SA553, SA353, 9Ni, Wuyang steel production in china.
Three, 06Ni9DR execution standard: 06Ni9DR chemical composition, 06Ni9DR mechanical properties
9%Ni low temperature pressure vessel GB24510-2009 steel plate flaw detection implementation JB/T4730.3-2005 pressure equipment non destructive testing
Four, 06Ni9DR delivery state: 06Ni9DR chemical composition, 06Ni9DR mechanical properties
The steel plate with off-line quenching + tempering quenching and tempering heat treatment delivery. In order to improve the toughness of the steel, can also carry out intermediate heat treatment (two times quenching), of a thickness of less than 12mm steel can be two times the normalized and tempered steel delivery, tempering temperature not lower than 540 DEG C.  
Five, 06Ni9DR chemical composition:
Chemical composition wt%
Grade Mn Si P C S Ni Mo V Alt
06Ni9DR (9%Ni) is less than or equal to
0.1 0.30-0.80 = 0.35 = 0.010 = 0.004 = 0.10 = 0.01 = 0.020 8.5-10
Remark: in order to improve the performance of the steel, other micro alloying elements can be added, and the Cr+Cu+Mo should not exceed 0.50%
Six, the mechanical properties of 06Ni9DR:
Product thickness T, mm yield strength tensile strength A% MPa horizontal Akv (-196) (J) C
Less than 30 = 575 680-820 = 18 = 100
Three