Q620C STEEL PLATE

With minimum yield strength above 620 Mpa,Q620C steel plate,Q620C steel sheet,Q620C metal plate is application for medium and high pressure boilers and high pressure vessels.In specification GB/T 16270,there are four different 620 grades,as Q620C steel plate,Q620D steel plate,Q620E steel plate and Q620F steel plate,they shall be done impact test at different low temperatues.

Technical Requirements & Additional Services for Q620C steel plate:
♦ Quenching and tempering heat treatment
♦ Low temperature impacting test
♦ Cutting and welding as per end user’s demands
♦ More striction on some chemical elements contains
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578 

►Mechnical property for GB/T 16270 Q620C steel plate:

Thickness(mm)	Yield strength (≥Mpa)	Tensile strength (Mpa)	Elongation in ≥, A %
T≤50	620	700-890	15
50<T≤100	580	700-890
100<T	560	650-830

►Chemical composition for GB/T 16270 Q620C steel plate (Heat Analysis Max%)

 

Main chemical elements composition of GB/T 16270 Q620C steel plate
C	Si	Mn	P	S	Cu	Cr
0.20	0.80	1.70	0.025	0.015	0.50	1.50
Ni	Mo	B	V	Nb	Ti	-
2.00	0.70	0.005	0.12	0.06	0.05	-