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LR Grade B ship plate,LR Grade B shipbuilding plate,LR Grade B steel plate
Source:Xin Steel Industry Date:2012/07/27
LR Grade B shipbuilding steel plate is common strength shipbuilding plate which is mainly used for built hull of vessels,ship body construction.Normally when rolling,Air rolled and Control Rolled is ok for ship plate LR Grade B with the thickness equal and belows 40 Millimeters,and for thickness above 40mm,the heat treatment shall be Normalised or TMCP,these two technical treatment would improve steel strength in yield and tensile points.Low temperature impacting test for LR Grade B shall be done under zero centigree when rolling.
Our mill test certificate for LR Grade B would be issued under format EN 10204 TYPE 3.2,it would indicate the five main chemical elements contains percentage and mechanical property which including yield strength and tensile strength for sample pieces.Else it should be drafted the impacting temperature and impacting energy value on this mill test certificate.The steel grade LR Grade B,heat number and certificate number all should be followed.
Chemical composition of Heat analysis for Shipbuilding steel plate LR Grade B (Max %):
|
C |
Si |
Mn (Min) |
P |
S |
|
0.21 |
0.35 |
0.80 |
0.035 |
0.035 |
Mechanical properties for Shipbuilding steel plate LR Grade B:
|
Yield strength (Mpa) |
Tensile strength (Mpa) |
Steel Mark |
|
235 |
400-520 |
LR/B |