Grade D Shipbuilding steel plate

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24-May-2024

Shipbuilding steel Grade D is a common tensile strength steel. ASTM A 131 Grade D steel plate is usual for shipbuilding and oil platform purpose.D shipbuilding steel is the Hull structural steel which with a good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.The shipbuilding steel grade D is mainly used in the manufacture of the ship's hull structure whose weight is below 10000 tons,and usually do navigation around coastal and river area.

Grade D Shipbuilding steel plate specification:
Thickness: 4mm to 260mm,
Width: 1200mm to 4000mm
Length: 3000mm to 18000mm.

Grade D steel plate Chemical Composition

Grade	C max	Si max	Mn	P max	S max	Als min
Grade D	0.21	0.35	0.60-1.20	0.035	0.035	0.015

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

Grade D steel plate Mechanical Property

Grade	Rm (MPa)	Re(MPa) min	A% min	Akv/J min
Grade D	400-520	235	22	E.T °C	Thickness (mm)
				-20	≤ 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 D steel plate Condition Of Delivery

Grade	category	The thickness of steel
		≤ 12	>12.5-25	>25-35	>35-50	>50-100
Grade D	Plate/sheet	A(50)			N(50) CR(50) TM(50)	N(50) TM(50) CR(25)
	Profile steel				N(50) CR(50) TM(50) AR*(25)	-

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 D steel plate Contrast in the different standard

ASTM A131M	TOCT 5521	JIS G3106	BS LR	GB712
Grade D	GradeD	SM400B SM400C	Grade D	Grade D

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