Grade B Shipbuilding steel plate

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10-Jul-2024

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, KUNFENG Steel 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.

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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

We keep more than 10000 ton Grade B ship steel spot monthly, so we have much confidence im supplying high qualfied A131 Grade B steel products for our customers. Any need of Grade B shipbuilding steel , please contact us by calling or emailing. We will give you prompt answer.