DNV FH40shipbuilding steel plate and sheet
DNV FH40 Steel Description:
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.
DNV FH40 is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.Shipbuilding steel,generally speaking,a hull structure steel , is to manufacture hull as the requirements of register of shipping. Shipbuilding steel includes four grades,that is A,B,C,D. Grade A means impact test at 20°C; Grade B is impact test at 0°C; Grade C means impact test at -20°C; Grade D is impact test at -40°C.
DNV FH40 Steel Application :
DNV FH40 steel can be used in the manufacture of the ocean ship's hull structure whose weight is above 10000 tons. DNV FH40 is mainly used to manufacture the ship hull structure of ocean, coastal and inland sea areas , shipyards, oil platforms, pipelines in the ocean, coastal power plants, port facilities and other structural parts.
DNV FH40 Steel chemical composition by [%]:
|
Grade |
C max |
Si ax |
Mn |
P max |
S max |
Als min |
Timax |
Cumax |
Cr max |
Ni max |
Mo max |
Nb |
V |
N max |
|
DNV FH40 |
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.
DNV FH40 Steel Mechanical properties:
|
Grade |
Rm (MPa) |
Re(MPa) min |
A% min |
Akv/J min |
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|
DNV FH40 |
510-660 |
390 |
20 |
E.T °C |
Thickness (mm) |
|||||
|
-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.
DNV FH40 Steel Delivery state:
Grade |
Fine grains elements |
category |
The thickness of steel |
|||||
|
≤ 12 |
>12.5-20 |
>20-25 |
>25-35 |
>35-50 |
>50-100 |
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|
DNV FH40 |
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.
DNV FH40 steel can be used in the manufacture of the ocean ship's hull structure whose weight is above 10000 tons.With excellent welding performance, a variety of welding method can be used for welding . FH40 has little alloy elements and grain refinement elements added, so its weldability is good .
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