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