Q390E Galvanized Sqaure Hollow Tube

Low temperature Q390E square hollow tubes in standard GB/T34201 mainly used in all types of buildings,highway guardrails and signage.The Galvanized square tubes and pipes Q390E shall be done minus 40 Deg.C impacting test when supplying.

Technical Requirements & Additional Services:
♦ Galvanized coating according to GB/T 13912
♦ Dimension tolerance according to GB/T6728
♦ Ultrasonic test under EN 10160,ASTM A435,A577,A578
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Surface Protection:Black,Varnish,Hot Dip Galvanized,Coating with shop prime.
 

►Mechnical property for Q390E low alloy structural steel tube:

Thickness (mm)
Q390E	≤ 16	> 16 ≤ 40	> 40
Yield strength (≥Mpa)	345	335	325
Tensile strength (Mpa)	470-630

►Chemical composition for Q390E low alloy structural steel tube (Heat Analysis Max%)

Main chemical elements composition of Q390E
C	Si	Mn	P	S	Nb	V	Ti
0.20	0.50	1.70	0.025	0.020	0.07	0.20	0.20
Cr	Ni	Cu	N	Mo	B	Als Min.
0.30	0.50	0.30	0.015	0.10	-	0.015