Grade-b-shipsteel

    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 plate cutting edges 6~200 1500~3000 3000~15000
    non- cutting edges 1300~3000
    Shipbuilidng coil cutting edges 1.2~19 1500~2000 760+20~760-70
    non-cutting edges 1510~2010

    Grade B steel plate theoretical weight


    Thickness (mm) 
    theoretical weight Thickness (mm) theoretical weight
    Kg/ft2 Kg/m2 Kg/ ft2 Kg/m2
    6 4.376 47.10 25 18.962 196.25
    7 5.105 54.95 26 20.420 204.10
    8 5.834 62.80 28 21.879 219.80
    10 7.293 78.50 30 23.337 235.50
    11 8.751 86.35 32 25.525 251.20
    12 10.21 94.20 34 26.254 266.90
    14 10.939 109.90 35 27.713 274.75
    16 11.669 125.60 40 29.172 314.00
    18 13.127 141.30 45 32.818 353.25
    20 14.586 157.00 48 35.006 376.80
    22 16.044 172.70 50 36.464 392.50
    24 18.232 188.40      

    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 ~2600 2600 ~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