DNV D shipbuilding steel plate and sheet
DNV D Steel Description:
The steel for shipbuilding and oil platform---D, is the common tensile strength steel.
It is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.
DNV D Steel Application :
DNV D 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 D Steel chemical composition by [%]:
|
Grade |
C max |
Si max |
Mn |
P max |
S max |
Als min |
|
DNV D |
0.21 |
0.35 |
0.60-1.20 |
0.035 |
0.035 |
0.015 |
Note:
1.CE: C+1/6Mn ≤ 0.40%,Cu ≤ 0.35%,Ni ≤ 0.30%
2.Some residual elements ,like Cu and Sn ,can be controlled,because they are harmful to the property .
DNV D Steel Mechanical properties:
|
Grade |
Rm (MPa) |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
DNV D |
400-520 |
235 |
22 |
E.T °C |
Thickness (mm) |
|||||
|
-20 |
≤ 50 |
>50-70 |
>70-100 |
|||||||
|
L |
C |
L |
C |
L |
C |
|||||
|
27 |
20 |
34 |
24 |
41 |
27 |
|||||
Note: In the list , Rm: .tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.
DNV D Steel Delivery state:
| Grade |
category |
The thickness of steel |
||||
|
≤ 12 |
>12.5-25 |
>25-35 |
>35-50 |
>50-100 |
||
|
DNV D |
Plate/sheet |
A(50) |
N(50) CR(50) |
N(50) TM(50) |
||
|
Profile steel |
N(50) CR(50) |
- |
||||
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.
3. For the steel of thickness above 50mm, if the steel has passed rain refinement process and normalizing or heat engine controlled method, impact energy test can be avoided.
Contrast in the different standard
| ASTM A131M |
TOCT 5521 |
JIS G3106 |
BS LR |
GB712 |
|
D |
D |
D |
D |
DNV D structural steel hull is a low-carbon steel with excellent welding performance. A variety of welding method can be used for welding . D-class products with good mechanical properties, welding performance, process performance.Shipbuilding steel,generally speaking,a hull structure steel , is to manufacture hull as the requirements of register of shipping.
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