DNV D420 Shipbuilding steel plate

DNV D420 Shipbuilding steel plate
 
Unitedsteel Mill is specialized at super thick steel plate which beyond nine classification society approval. We have cooperated with LR, DNV, CCS, ABS, BV, GL, NK, KR, and RINA to do the third party inspection to promise quality for our customers in many years.
D420,E420,F420,A500,D500,E500,F500,D460,A460,E460,F460,A550,D550,E550,F550,A60,D620,E620,F620,A690,D690,E690,F690
 
NV D420 is applied to extra high strength steels, which is defined as steel with specified min yield stress of 420Mpa. The max yield is 690Mpa in NV A690.
 
NV D420 steel grade shall be killed and find grain treated. Steel grade of strength levels up to and including 500Mpa should be supplied in Normalized, TM or QT condition. Steel grade of strength levels above 500Mpa shall be supplied in TM or QT delivery condition.
 
For more information in NV D420 steel grade, please refer to the following:
NV D420 Chemical composition heat analysis

Element	NV D420  Max %	Element	NV D420  max %
C	0.20	Ni	0.40
Mn	1.70	Mo	0.08
Si	0.10-0.55	Al	0.020 min
S	0.030	Nb	0.20-0.05
P	0.030	V	0.05-0.10
Cu	0.35	Ti	0.0007-0.05
Cr	0.20	N

           
NV D420 Mechanical properties,            longitudinal min impact energy

Grade	Thickness	Yield Strength	Tensile Strength	Elongation	Impact Energy
	(mm)	MPa (min)	MPa	% (min)	(KV J) (min)
					-20 degree
NV D420	8-260	420	530-680	18	28J

Note: the impact energy under less 150mm thickness
 
If you have any need in NV D420 steel plate, please feel free to contact us soon to get a competitive price.