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AH36, DH36, EH36 Steel Plate for Shipbuilding Steel Supplier

What is the Shipbuilding Steel Plate

Shipbuilding steel plate refers to hot-rolled steel for the manufacture of ship structures produced in accordance with the requirements of the construction society. Modern shipbuilding plates have much higher tensile strengths than their predecessors, making them much better suited to the efficient construction of large container ships.

The quality of shipbuilding steels has an extremely large impact on the quality, efficiency, and cost of ships built from those steels. Many steel producers established a system to supply wide and long plates to the shipbuilding industry.

Shipbuilding Steel Classification

The standard strength steel of China Classification Society is divided into four quality grades: A, B, C, and D, namely, CCSA, CCSB, CCSC, and CCSD. The high strength structural steel regulated by the China Classification Society is three strength grades and four quality grades.

Common grades are A, B, D, E, AH32/36/40, DH32/36/40, and EH32/36/40 which ranged from different strength. The plates usually used to manufacture ship hulls, bulkheads, upper decks and hatch covers for tankers, bulk carriers, container ships and LNG carriers.

For the high strength shipbuilding plates like AH36, DH36, EH36 steel plate, they have been widely used in high stress areas of ships, comparing with general strength steel, they are offering the same strength with the smaller thickness.

Shipbuiding Standards from Different Countries

Shipbuilding steel plates are produced according to the classification society,different countries refers to offshore and marine steels in different classification society. Mainly as following:

ABS (American Bureau of Shipping)
BV (Bureau Veritas)
CCS (China Classification Society)
DNV (Det Norske Veritas)
GL (Germanischer Lloyd)
HR (Hellenic Register of Shipping)
KR (Korean Register of Shipping)
LR (Lloyd's Register of Shipping)
NK (Nippon Kaiji Kyokai)
RINA (Registro Italiano Navale)
RS (India Register of Shipping)

Grade and Chemicals of shipbuilding plates

Grade	C max	Si max	Mn	P max	S max	Als min
A	0.21	0.50	≥ 2.5C	0.035	0.035	-
B	0.21	0.35	0.80-1.20	0.035	0.035	-
D	0.21	0.35	0.60-1.20	0.035	0.035	0.015
E	0.18	0.35	0.70-1.20	0.035	0.035	0.015

Shipbuilding Steel Plate Mechanical Properties

Grade	Thickness(mm) max	Yieldpoint(Mpa) min	Tensile Strength(Mpa)	Elongation（%）min	V-impact test			cold bend test
					Temperature（℃）	Average AKV		b=2a 180°	b=5a 120°
					Temperature（℃）	lengthways Min	crosswise Min	b=2a 180°	b=5a 120°
A	50	235	400~490	22	—	—	—	d=2a	—
B	50	235	400~490	22	0	27	20	—	d=3a
D	50	235	400~490	22	27	20	—	d=3a	-10
E	50	235	400~490	22	27	20	—	d=3a	-40
A32	50	315	440~590	22	0	31	22	—	d=3a
D32	50	315	440~590	22	-20	31	22	—	d=3a
E32	50	315	440~590	22	-40	31	22	—	d=3a
A36	50	355	490~620	21	0	34	24	—	d=3a
D36	50	355	490~620	21	-20	34	24	—	d=3a
E36	50	355	490~620	21	-40	34	24	—	d=3a

Shipbuilding Plate Available Dimensions

Item	Thickness (mm)	Width (mm)	Length/coil diameter(mm)
Shipbuilidng plate	6~50	1300~3000	3000~15000
Shipbuilidng coil	6~20	1500~2000	760+20~760-70

Shipbuilding Steel Theoretical Weight

Thickness (mm)	Estimate Weight		Thickness (mm)	Estimate Weight
Thickness (mm)	Kg/ft2	Kg/m2	Thickness (mm)	Kg/ft2	Kg/m2
6	4.376	47.1	25	18.962	196.25
7	5.105	54.95	26	20.42	204.1
8	5.834	62.8	28	21.879	219.8
10	7.293	78.5	30	23.337	235.5
11	8.751	86.35	32	25.525	251.2
12	10.21	94.2	34	26.254	266.9
14	10.939	109.9	35	27.713	274.75
16	11.669	125.6	40	29.172	314
18	13.127	141.3	45	32.818	353.25
20	14.586	157	48	35.006	376.8
22	16.044	172.7	50	36.464	392.5
24	18.232	188.4	-	-	-

Dimensional Deviation

nominal thickness（mm）	minus deviation (mm)	The thickness deviation with following width (mm)
nominal thickness（mm）	minus deviation (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	1.1	1.2
>25~30	-0.9	0.2	0.2	0.3	0.4	0.6	0.8	0.9	1	1.1	1.2
>30~34	-1	0.2	0.3	0.3	0.4	0.6	0.8	0.9	1	1.2	1.3
>34~40	-1.1	0.3	0.4	0.5	0.6	0.7	0.9	1	1.1	1.3	1.4
>40~45	-1.2	0.4	0.5	0.6	0.7	0.8	1	1.1	1.2	1.4	1