LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS Grade A Shipbuilding steel plate

Capable Classification Society Quality Authentication from LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS,Grade A steel plate is used for shipbuiling s hull structure and platform. The shipbuilding steel plate grade A is the common tensile strength steel. It has good toughness properties and higher strength, strong corrosion-resistance,the processing properties,and welding properties.ASTM A131 Grade A steel plate can be 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 A shipbuiling steel plate specification:
Thickness: 4mm to 260mm,
Width: 1200mm to 4000mm
Length: 3000mm to 18000mm.

Grade A steel plate Chemical Composition

Grade

C max

Si max

Mn

P max

S max

Grade A

0.21

0.50

 ≥ 2.5C

0.035

0.035

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

Grade A steel plate Mechanical Property

Grade

Rm
 (MPa)

Re(MPa) min

A% min

Akv/J min

Grade A

400-520

235

22

E.T °C

Thickness (mm)

20

50

>50-70

>70-100

L

C

L

C

L

C

-

-

34

24

41

27

 Note: In the list , Rm: tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.

Condition Of Delivery

Grade

category

The thickness of steel

≤12

>12.5-25

>25-35

>35-50

>50-100

Grade A

Plate/sheet

A(-)

N(-),TM(-)
 CR(50)
 AR*(50)

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 isTon.(-) means without impact test.Contrast in the different standard

ASTM A131M

TOCT 5521

JIS G3106

BS LR

GB712

Grade A

A

SM400A

A

A

Grade A steel plate Available Specification

variety
Thickness (mm)Width (mm)Longth/ inner diameter (mm)
Shipbuilidng platecutting edges6~2001500~30003000~15000
non- cutting edges1300~3000
Shipbuilidng coilcutting edges1.2~191500~2000760+20~760-70
non-cutting edges1510~2010

Grade A steel plate theoretical weight

Thickness (mm) 
theoretical weightThickness (mm)theoretical weight
Kg/ft2Kg/m2Kg/ ft2Kg/m2
64.37647.102518.962196.25
75.10554.952620.420204.10
85.83462.802821.879219.80
107.29378.503023.337235.50
118.75186.353225.525251.20
1210.2194.203426.254266.90
1410.939109.903527.713274.75
1611.669125.604029.172314.00
1813.127141.304532.818353.25
2014.586157.004835.006376.80
2216.044172.705036.464392.50
2418.232188.40   

Grade A 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 ~26002600 ~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

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Address: Development Zone, Zhengzhou, China