Q390A Welded Sqaure Hollow Section

Xinsteel keeps all kinds of stock hot formed and cold formed square tubes Q390A,square hollow sections Q390A and welded square pipes Q390A.The manufacturing processes of hot finished and cold formed hollow sections are very different.Hot finished hollow sections are formed at normalising temperature (approx 900°C).Cold formed hollow sections are formed at ambient temperature.

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 Q390A low alloy structural steel hollow section:

Q390A
Yield strength (≥Mpa)	390
Tensile strength (Mpa)	490-650

►Chemical composition for Q390A low alloy structural steel hollow section (Heat Analysis Max%)

Main chemical elements composition of Q390A
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