DNV A550 Shipbuilding steel plate

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DNV A550 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 A550 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 A550 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 A550 steel grade, please refer to the following:


NV A550 Chemical composition heat analysis
Element NV A550  Max % Element NV A550  max %
C 0.21 Ni 0.40
Mn 1.70 Mo 0.08
Si  0.10-0.55    Al   0.020 min
S 0.035    Nb 0.20-0.05
P 0.035 V 0.05-0.10
Cu 0.35 Ti 0.0007-0.05
    Cr 0.20 N  
           
NV A550 Mechanical properties,            longitudinal min impact energy
Grade Thickness Yield Strength Tensile Strength Elongation Impact Energy
(mm) MPa (min) MPa % (min) (KV J) (min)
        0 degree
NV A550 8-260 550 670-830 16 37J
Note: the impact energy under less 150mm thickness
 
If you have any need in NV A550 steel plate, please feel free to contact us soon to get a competitive price.