Q345B Galvanized Sqaure Tube

The Hot rolled square hollow sections Q345B in standard GB/T34201 mainly used in all types of buildings,sometimes,customers need to be done hot dip galvanized coating for these square hollow sections. Xinsteel also keeps stock for various zinc coating thickness square tubes and pipes in warehouses.

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 Q345A low alloy structural steel tube:
 

Thickness (mm)
Q345A	≤ 16	> 16 ≤ 40	> 40
Yield strength (≥Mpa)	345	335	325
Tensile strength (Mpa)	470-630

►Chemical composition for Q345A low alloy structural steel tube (Heat Analysis Max%)
 

Main chemical elements composition of Q345A
C	Si	Mn	P	S	Nb	V	Ti
0.20	0.50	1.70	0.035	0.035	0.07	0.15	0.20
Cr	Ni	Cu	N	Mo	B	Al Min.
0.30	0.50	0.30	0.012	0.10	-	-