DNV EH40 shipbuilding steel plate and sheet
DNV EH40 Steel Description:
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.
DNV EH40 is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.DNV EH40 steel can be used in the manufacture of the ocean ship's hull structure whose weight is above 10000 tons.
DNV EH40 Steel Application :
DNV EH40 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 EH40 Steel chemical composition by [%]:
|
Grade |
C max |
Si max |
Mn |
P max |
S max |
Als min |
Ti max |
Cu max |
Cr max |
Ni max |
Mo max |
Nb |
V |
|
DNV EH40 |
0.18 |
0.50 |
0.90-1.60 |
0.035 |
0.035 |
0.015 |
0.02 |
0.35 |
0.20 |
0.40 |
0.08 |
0.02-0.05 |
0.05-0.10 |
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 EH40 Steel Mechanical properties:
| Grade |
Rm (MPa) |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
DNV EH40 |
510-660 |
390 |
20 |
E.T °C |
Thickness (mm) |
|||||
|
0 |
≤ 50 |
>50-70 |
>70-100 |
|||||||
|
L |
C |
L |
C |
L |
C |
|||||
|
41 |
27 |
- |
||||||||
Note: In the list , Rm: tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.
DNV EH40 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 EH40 |
any |
Plate/ |
N(50),CR(50),TM(50) |
- |
||||
|
Profile steel |
||||||||
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.
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. With excellent welding performance,so a variety of welding method can be used for welding . DNV EH40 has little alloy elements and grain refinement elements added, so its weldability is good.
Source:
Tags:
