Q345D

GB/T1591 Q345D High strength low alloy structural steels
Thickness:3mm-500mm
Width:1000mm-4200mm
Length:3000mm-18000mm
Heat Treatment:As rolled/Control-rolled/Normalised
GB/T1591 Q345D steel shall be done charpy V-notch impacting test under minus 20 centigrade.Many container manufacturers adpots these high tension strength to make offshore containers which can be used in deep oceans.
Technical Requirements & Additional Services:
♦ Low temperature impacting test
♦ Cutting and welding as per end user's demands
♦ More striction on some chemical elements contains
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578

Mechnical property for Q345D low alloy structural steel:

Thickness (mm)
Q345D ≤ 16 > 16 ≤ 35 > 35 ≤ 50 >50
Yield strength (≥Mpa) 345 325 295 275
Tensile strength (Mpa) 470-630

Chemical composition for Q345D low alloy structural steel (Heat Analysis Max%)

Main chemical elements composition of Q345D
C Si Mn P S V Nb Ti Al (min.)
0.18 0.55 1.00-1.60 0.030 0.030 0.02-0.15 0.015-0.060 0.02-0.20 0.015
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