shipbuilding steel plate and sheet
The steel for shipbuilding and oil platform---E, is the common tensile strength steel.
DNV E steel is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.
DNV E steel can be used in the manufacture of the ship's hull structure whose weight is below 10000 tons,and usually do navigation around coastal and river area.
DNV E Steel chemical composition by [%]:
|
Grade |
C max |
Si max |
Mn |
P max |
S max |
Als min |
|
DNV E |
0.18 |
0.35 |
0.70-1.20 |
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 E Steel Mechanical properties:
|
Grade |
Rm (MPa) |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
DNV E |
400-520 |
235 |
22 |
E.T °C |
Thickness (mm) |
|||||
|
-40 |
≤ 50 |
>50-70 |
>70-100 |
|||||||
|
L |
C |
L |
C |
L |
C |
|||||
|
27 |
20 |
34 |
24 |
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 E steel is a low-carbon steel with excellent welding performance. A variety of welding method can be used for welding.
DNV E Steel Delivery state:
|
Grade |
category |
The thickness of steel |
|||||
|
≤ 12 |
>12.5-25 |
>25-35 |
>35-50 |
>50-100 |
|||
|
DNV E |
Plate/sheet |
N,TM |
|||||
|
Profile steel |
N(25),TM(25),AR*(15),CR*(15) |
- |
|||||
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 |
JIS G3106 |
BS LR |
GB712 |
|
E |
E |
E |
E |
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 E has little alloy elements and grain refinement elements added, so its weldability is good.
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