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 |
Re(MPa) min |
A% min |
Akv/J min |
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|
Grade B |
400-520 |
235 |
22 |
E.T °C |
Thickness (mm) |
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|
0 |
≤ 50 |
>50-70 |
>70-100 |
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|
L |
C |
L |
C |
L |
C |
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|
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.
Grade B steel Condition Of Delivery
Grade |
category |
The thickness of steel |
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|
≤ 12 |
>12.5-25 |
>25-35 |
>35-50 |
>50-100 |
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|
Grade B |
Plate/sheet |
A(-) |
A(50) |
N(50),TM(50) |
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|
Profile steel |
- |
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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 |
Grade B |
Grade B |
Standard ASTM A 131M covers structural steel-shapes, plates, bars, and rivets intended primarily for use in ship construction. Material under specification A 131M is available in the following categories:
Ordinary Strength - Grades A, B, D, DS, CS, and E with a specified minimum yield point of 235Mpa, and
Higher Strength - Grades AH, DH, and EH with specified minimum yield points of either 315 MPa or 350 MPa.
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