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NK A40

NK A40   

NK A40 Shipbuilding steel plate
The NK A40 steel plate is the mainly kinds of steel for shipbuilding and oil platform, the shipbuilding grade NK A40 can be used in the manufacture of the ship's hull structure, whose weight is more then 10000 tons.  Shipbuilding grade NK A40 steel is the high tensile strength steel, NK A40 steel for shipbuilding and oil platform must be good toughness properties, higher strength, strong corrosion-resistance, the processing properties, and welding properties.
The NK A40 steel plate Chemical Composition %

Grade

C max

Si max

Mn

P max

S max

Als min

Ti max

Cu max

Cr
max

Ni
max

Mo
max

Nb

V

NK A40

0.18

0.50

0.90-1.60

0.035

0.035

0.015

0.02

0.35

0.20

0.40

0.08

0.02-0.05

0.05-0.10

Note: Generally speaking CE will be ≤ 0.40%. If the delivery condition is TMPC, the CE will be : ≤ 0.40% (thickness ≤ 50mm). Ceq% =(C+Mn)/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
The NK A40 steel plate Mechanical Property

Grade

Rm
(MPa)

Re(MPa) min

A% min

Akv/J min

NK A40

510-660

390

20

E.T °C

Thickness (mm)

0

≤ 50

>50-70

>70-100

L

C

L

C

L

C

41

27

-

Note: In the list , Rm: tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.
NK A40 Condition Of Delivery



Grade

Fine grains elements

category

The thickness of steel

≤ 12

>12.5-20

>20-25

>25-35

>35-50

>50-100

NK A40

any

Plate/
sheet

A(50)

N(50),CR(50),TM(50)

-

Profile steel

Note: 1. delivery condition: A =Any ; N=Normalized ; CR=Control Rolled ; TM=TMPC, Temperature - deformation control rolling; AR*= Can be hot rolled with the agreement of Classification Society ; CR*=Can be control rolled with the agreement of Classification Society .
2.  The Figure in the ( ) means the sampling volume to do the impact test, the unit is Ton.(-) means without impact test.

Key Words: Supply NK A40 steel for shipbuilding, NK A40 steel for shipbuilding manufacturer,
NK A40 steel for shipbuilding suppliers, manufacture NK A40 steel for shipbuilding,
NK A40 steel for shipbuilding warehouser,

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