LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS Grade B Shipbuilding steel plate

Capable Classification Society Quality Authentication from LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS Grade B steel,ASTM A131 Grade B steel plate is a kind of shipbuilding steel which is mainly for shipbuilding and platform. Grade B shipbuilding steel plate is a common tensile strength steel. As a professional A131 Grade B shipbuilding steel plate exporter, Bebon international can supply high quality Grade B steel plate in most competitive price. ASTM A 131 shipbuilding steel plates can be used in the manufacture of the ship s hull structure whose weight is below 10000 tons.

Grade B shipbuilding steel plate specification:
Thickness: 6mm-200mm, Width: 1500mm-4000mm, Length: 6000mm-180000mm

Grade B steel Chemical Composition

Grade

C max

Si max

Mn

P max

S max

Grade B

0.21

0.35

 0.80-1.20

0.035

0.035

Note: CE: C+1/6Mn ≤ 0.40% Cu ≤ 0.35%,Ni ≤ 0.30%≤

Grade B steel  Mechanical Property

Grade

Rm
 (MPa)

Re(MPa) min

A% min

Akv/J min

Grade B

400-520

235

22

E.T °C

Thickness (mm)

0

≤ 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.

Grade B steel Condition Of Delivery

Grade

category

The thickness of steel

≤ 12

>12.5-25

>25-35

>35-50

>50-100

Grade B

Plate/sheet

 A(-)

A(50)

N(50),TM(50)
 CR(25)
 AR*(25)

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.

Grade B steel Contrast in the different standards

ASTM A131M

TOCT 5521

JIS G3106

BS LR

GB712

Grade B

Grade B

SM400B
 SM400C

Grade B

Grade B

Grade B steel plate Available Specification

variety
Thickness (mm)Width (mm)Longth/ inner diameter (mm)
Shipbuilidng platecutting edges6~2001500~30003000~15000
non- cutting edges1300~3000
Shipbuilidng coilcutting edges1.2~191500~2000760+20~760-70
non-cutting edges1510~2010

Grade B steel plate theoretical weight

Thickness (mm) 
theoretical weightThickness (mm)theoretical weight
Kg/ft2Kg/m2Kg/ ft2Kg/m2
64.37647.102518.962196.25
75.10554.952620.420204.10
85.83462.802821.879219.80
107.29378.503023.337235.50
118.75186.353225.525251.20
1210.2194.203426.254266.90
1410.939109.903527.713274.75
1611.669125.604029.172314.00
1813.127141.304532.818353.25
2014.586157.004835.006376.80
2216.044172.705036.464392.50
2418.232188.40   

Grade B steel plate dimensional deviation

nominal thickness（mm）
The thickness deviation with following width (mm)
≤1200>1200~1500>1500~1800>1800
>6.0~8.0±0.29±0.30±0.31±0.35
>8.0~10.0±0.32±0.33±0.34±0.35
>10.0~12.0±0.35±0.36±0.37±0.43

nominal thickness（mm）

 

minus deviation (mm)The thickness deviation with following width (mm)
> 1000 ~1200> 1200 ~1500> 1500 ~1700> 1700 ~1800> 1800 ~2000> 2000 ~2300> 2300 ~2500> 2500 ~26002600 ~2800> 2800 ~3000
>12~25-0.8+0.2+0.2+0.3+0.4+0.6+0.8+0.8+1.0+1.1+1.2
>25~30-0.9+0.2+0.2+0.3+0.4+0.6+0.8+0.9+1.0+1.1+1.2
>30~34-1.0+0.2+0.3+0.3+0.4+0.6+0.8+0.9+1.0+1.2+1.3
>34~40-1.1+0.3+0.4+0.5+0.6+0.7+0.9+1.0+1.1+1.3+1.4
>40~45-1.2+0.4+0.5+0.6+0.7+0.8+1.0+1.1+1.2+1.4+1.5

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