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

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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Shandong Chengshun Metal Materials Co., Ltd. is located in Jinan City, Shandong Province. It is a comprehensive company dealing in high-quality steel products, with a superior geographical location and very convenient transportation. The company has a complete and scientific quality system, and has been recognized by the industry for its integrity, strength and product quality.

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Mainly exported to Europe, Southeast Asia, South Africa, the Middle East, Latin America and other countries and regions, the products are favored by Chinese and foreign users.

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Hight Strength Low Alloy Steel