Q390D

Q390D steel plate

GB/T1591 Q390 contains five different steel grades as Q390A,Q390B,Q390C,Q390D and Q390E.Structural steel Q390D shall be done impacting test at low temperature minus 20 degree centigrade.Normalised heat treatment suggested to be done for low alloy steel plate Q390D in heavy thickness.
Full Data 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  Techicals

Mechnical property for Q390D low alloy structural steel:

Thickness (mm)
Q390D ≤ 16 > 16 ≤ 35 > 35 ≤ 50 >50
Yield strength (≥Mpa) 390 370 350 330
Tensile strength (Mpa) 490-650

Chemical composition for Q390D low alloy structural steel (Heat Analysis Max%)

Main chemical elements composition of Q390D
C Si Mn P S V Nb Ti Al (min.) Cr Ni
0.20 0.55 1.00-1.60 0.030 0.030 0.02-0.20 0.015-0.060 0.02-0.20 0.015 0.30 0.70
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