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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.

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Chemical Composition Mechanical Property

Chemical Composition

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

Mechanical Property

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

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