Q390C Welded Rectangular Hollow Section

Welded Rectangular hollow sections Q390C in standard GB/T 3091 is inherently strong and efficient.These sections give buildings a better strength-to-weight ratio than those using comparable steel,concreteor timber products.Rectangular hollow section Q390C shall be done low temperature impating test at zero Deg.C when rolling.

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 Q390C low alloy structural steel hollow section:
 

Q390C
Yield strength (≥Mpa)	390
Tensile strength (Mpa)	490-650

►Chemical composition for Q390C low alloy structural steel hollow section (Heat Analysis Max%)
 

Main chemical elements composition of Q390C
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