DNV FH36 shipbuilding steel plate and sheet
DNV FH36 Steel Description:
The steel for shipbuilding and oil platform---FH36, is the high tensile strength steel.
DNV FH36 is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.With excellent welding performance, a variety of welding method can be used for welding . FH36 has little alloy elements and grain refinement elements added, so its weldability is good .
DNV FH36 Steel Application :
DNV FH36 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 FH36 Steel chemical composition by [%]:
|
Grade |
C max |
Si ax |
Mn |
P max |
S max |
Als in |
Ti ax |
Cu ax |
Cr max |
Ni max |
Mo max |
Nb |
V |
N max |
|
DNV FH36 |
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 :
≤ 0.38% (thickness ≤ 50mm),≤0.40%( when the thickness >50-100).
Ceq% =(C+Mn)/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
DNV FH36 Steel Mechanical properties:
|
Grade |
Rm (MPa) |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
DNV FH36 |
490-630 |
355 |
21 |
E.T °C |
Thickness (mm) |
|||||
|
-60 |
≤ 50 |
>50-70 |
>70-100 |
|||||||
|
L |
C |
L |
C |
L |
C |
|||||
|
34 |
24 |
- |
- |
- |
- |
|||||
Note: In the list , Rm: .tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.
DNV FH36 Steel Delivery state:
| Grade |
Fine grains elements |
category |
The thickness of steel |
|||||
|
≤ 12 |
>12.5-20 |
>20-25 |
>25-35 |
>35-50 |
>50-100 |
|||
|
DNV FH36 |
Any |
Plate/sheet |
N,TM,Q&T |
|||||
|
Profile steel |
N(25),TM(25),Q&T(15),CR*(25) |
- |
||||||
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.
Contrast in the different standard
|
ASTM A131M |
TOCT 5521 |
BS LR |
GB712 |
|
FH36 |
F36 |
FH36 |
F36 |
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 FH36 steel can be used in the manufacture of the ocean ship's hull structure whose weight is above 10000 tons.
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