Shipbuilding steel plates

 

Steel shipbuilding plates are used in the cabin structures of cruise ships. The thin but wide plates are used for such applications to offer the best processing properties such as flatness and weldability. In contrast, high-strength, thermomechanically rolled shipbuilding plates are used in offshore applications. They are used for platform superstructures or special ships in the oil and gas industry.

Shipbuilding traditionally uses structural steel plates to fabricate ship hulls. Modern steel plates have much higher tensile strengths than their predecessors, making them much better suited to the efficient construction of large container ships. Here are the Advantages of Shipbuilding Plates High corrosion resistant steel plate is a perfect steel type for oil tanks, and when used in shipbuilding, ship weight is less for the same capacity ships, fuel cost and CO2 emission can be reduced.

Grades.

• A, B, D, E
• AH 32 TM, A 32 TM, DH 32 TM, D 32 TM, EH 32 TM, E 32 TM
• AH 36 TM, A 36 TM, DH 36 TM, D 36 TM, EH 36 TM, E 36 TM, FH 36 TM, F 36 TM

As a Shipbuilding steel plate is used in the corrosive sea environment, steel plates with high strength and corrosion resistance are more suitable for building ships. Additionally, welding performance is also a key requirement for shipbuilding steel plates. But how to make a shipbuilding plate with higher strength? Take F series, for example, carbon element is being controlled in the hot rolling process, and TMCP technology is the key for manufacturing high-quality shipbuilding plates.

Dimensions

• Plate thickness: 5–140 mm max. (dependent on width and steel grade)
• Plate width: 3,950 mm max. (dependent on thickness and steel grade)
• Plate length: 18,700 mm max. (dependent on thickness and steel grade)
• Ordered weight: At least 2 tons per line item
• Unit weight: 19.5 tons max.

Shipbuilding steel plate refers to hot-rolled steel for the manufacture of ship structures produced in accordance with the requirements of the construction society. Often used as a special steel ordering, scheduling, sales, a ship including ship plates, steel and so on.

AH36 DH36 EH36 FH36 Chemical Composition:

ABS High Strength Steel Chemical Composition \%≤
Element	ABS Grade AH36	ABS Grade DH36	ABS Grade EH36	ABS Grade FH36
C	0.18	0.18	0.18	0.16
Mn	0.90-1.60	0.90-1.60	0.90-1.60	0.90-1.60
Si	0.10-0.50	0.10-0.50	0.10-0.50	0.10-0.50
P	0.035	0.035	0.035	0.025
S	0.035	0.035	0.035	0.025
Al (acid)≥	0.015	0.015	0.015	0.015
Nb	0.02-0.05	0.02-0.05	0.02-0.05	0.02-0.05
V	0.05-0.10	0.05-0.10	0.05-0.10	0.05-0.10
Ti	0.02	0.02	0.02	0.02
Cu	0.35	0.35	0.35	0.35
Cr	0.20	0.20	0.20	0.20
Ni	0.40	0.40	0.40	0.80
Mo	0.08	0.08	0.08	0.08
N				0.009

Mechanical Property for ABS AH36, DH36, EH36, FH36

Mechanical Property	ABS Grade AH36	ABS Grade DH36	ABS Grade EH36	ABS Grade FH36
Tensile Strength(Mpa)? ≥	490-620	490-620	490-620	490-620
Yield Strength (Mpa)? ≥	355	355	355	355

Equivalent ABS Grade EH36 Steel Grades

ABS	LR/LRS	GL	DNV	BV	RINA	RMRS
ABS EH36	EH36	E36	E36	EH36	EH36	E36

Shipbuilding Steel Classification:

The Shipbuilding steel plate can be divided into general strength structural steel and high strength structural steel according to its minimum yield point strength level.

Grade	C%≤	Mn %	Si %	p % ≤	S % ≤	Al %	Nb %	V %
A	0.22	≥ 2.5C	0.10~0.35	0.04	0.40	—	—	—
B	0.21	0.60~1.00	0.10~0.35	0.04	0.40	—	—	—
D	0.21	0.60~1.00	0.10~0.35	0.04	0.04	≥0.015	—	—
E	0.18	0.70~1.20	0.10~0.35	0.04	0.04	≥0.015	—
A32 D32 E32	0.18	0.70~1.60 0.90~1.60 0.90~1.60	0.10~0.50	0.04	0.04	≥0.015	—	—
A36 D36 E36	0.18	0.70~1.60 0.90~1.60 0.90~1.60	0.10~0.50	0.04	0.04	≥0.015	0.015~0.050	0.030~0.10

Shipbuilding Steel Plate Mechanical Properties:

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

Shipbuilding Plate Available Dimensions:

Variety		Thickness (mm)	Width (mm)	Longth/ inner diameter (mm)
Shipbuilidng plate	cutting edges	6~50	1500~3000	3000~15000
	non- cutting edges		1300~3000
Shipbuilidng coil	cutting edges	6~20	1500~2000	760+20~760-70
	non-cutting edges		1510~2010

Shipbuilding Steel 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

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.

The Shipbuilding steel plate is a hot rolled steel plate which is produced as per the Bureau of Shipping Standard and is used for manufacturing hull structure.