NK F40 Shipbuilding steel plate
The NK F40 steel plate is the mainly kinds of steel for shipbuilding and oil platform, theshipbuilding grade NK F40 steel can be used in the manufacture of the ship's hull structure, whose weight is more then 10000 tons. Shipbuilding grade NK F40 is the high tensile strength steel, NK F40 steel for shipbuilding and oil platform must be good toughness properties, higher strength, strong corrosion-resistance, the processing properties, and welding properties.
NK F40 steel plate Chemical Composition %
Grade |
C max |
Si max |
Mn |
P max |
S max |
Als min |
Ti max |
Cu max |
Cr |
Ni |
Mo |
Nb |
V |
N max |
|
NK F40 |
0.16 |
0.50 |
0.90-1.60 |
0.025 |
0.025 |
0.015 |
0.02 |
0.35 |
0.20 |
0.80 |
0.08 |
0.02-0.05 |
0.05-0.10 |
0.009 |
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.
NK F40 steel plate Mechanical Property
Grade |
Rm |
Re(MPa) min |
A% min |
Akv/J min |
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|
NK F40 |
510-660 |
390 |
20 |
E.T °C |
Thickness (mm) |
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|
-40 |
≤ 50 |
>50-70 |
>70-100 |
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|
L |
C |
L |
C |
L |
C |
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|
41 |
27 |
- |
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Note: In the list , Rm: .tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.
NK F40 steel plate Condition Of Delivery
Grade |
Fine grains elements |
category |
The thickness of steel |
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|
≤ 12 |
>12.5-20 |
>20-25 |
>25-35 |
>35-50 |
>50-100 |
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|
NK F40 |
Any |
Plate/sheet |
N,TM,Q&T |
- |
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|
Profile steel |
N(25),TM(25),Q&T(25) |
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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.
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