Q390E Welded Sqaure Hollow Section

Low temperature Q390E welded square hollow sections in standard GB/T3091 mainly used in all types of buildings,highway guardrails and signage,support columns,trusses,bridges,heavy equipment,storage systems and exercise equipments.The 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 hollow section:

 

Q390E
Yield strength (≥Mpa)	390
Tensile strength (Mpa)	490-650

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

Main chemical elements composition of Q390E
C	Si	Mn	P	S	V	Nb	Ti	Cr	Ni
0.20	0.55	1.00-1.60	0.045	0.045	0.02-0.20	0.015-0.060	0.02-0.20	0.30	0.70