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:
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Thickness (mm)
|
|
Q345D
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≤ 16
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> 16 ≤ 35
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> 35 ≤ 50
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>50
|
|
Yield strength (≥Mpa)
|
345
|
325
|
295
|
275
|
|
Tensile strength (Mpa)
|
470-630
|
►Chemical composition for Q345D low alloy structural steel (Heat Analysis Max%)
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Main chemical elements composition of Q345D
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|
C
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Si
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Mn
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P
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S
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V
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Nb
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Ti
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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
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0.015
|