GL ETM shipbuilding steel plate and sheet
The steel for shipbuilding and oil platform---ETM, is the common tensile strength steel.
GL ETM steel is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.
GL ETM 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.GL ETM 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.
GL ETM Steel chemical composition by [%]:
|
Grade |
C max |
Si max |
Mn |
P max |
S max |
Als min |
|
GL ETM |
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 .
GL ETM Steel Mechanical properties:
|
Grade |
Rm |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
GL ETM |
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.
GL ETM steel is a low-carbon steel with excellent welding performance. A variety of welding method can be used for welding.
GL ETM Steel Delivery state:
|
Grade |
category |
The thickness of steel |
|||||
|
≤ 12 |
>12.5-25 |
>25-35 |
>35-50 |
>50-100 |
|||
|
GL ETM |
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 |
GL ETM is with excellent welding performance,so a variety of welding method can be used for welding . GL ETM has little alloy elements and grain refinement elements added, so its weldability is good.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.
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