Q420ND STEEL PLATE

High strength low alloy Q420ND steel plate in specification GB/T 1591:2018 is equivalent to EN 10025-3 S420N steel plate.Q420ND steel plate and S420N steel plate both shall be done low temperature impacting test at -20 Deg.C when supplying.

Technical Requirements & Additional Services for Q420ND steel plate:
♦ Normalising or Normalising Rolling heat treatment
♦ Cutting,Welding,Machining,Milling as per end user’s CAD drawing
♦ Shot blasting comply to SA 2.5 or SSPC and painting with shop primer
♦ More striction on some chemical elements contains for special applications
♦ Non-destructive inspection under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578 
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2 with ABS,LR,BV,DNV-GL,SGS

►Mechnical property for GB/T 1591-2018 Q420ND STEEL PLATE

Mechanical Property for Q420ND steel plate
	Thickness (mm)
Yield strength (≥Mpa)	T≤16	16<T≤40	40<T≤63	63<T≤80	80<T≤100	100<T≤150	150<T≤200	200<T
	420	400	390	370	360	340	330	320
Tensile strength (Mpa)	T≤100		100<T≤200			200<T
	520-680		500-650			500-650

►Chemical composition for GB/T 1591-2018 Q420ND STEEL PLATE (Heat Analysis Max%)

Main chemical elements composition of Q420ND
C	Si	Mn	P	S	Nb	V
0.20	0.60	1.00-1.70	0.030	0.025	0.01-0.05	0.01-0.20
Ti	Cr	Ni	Cu	Mo	N	Als Min.
0.006-0.05	0.30	0.80	0.40	0.10	0.025	0.015