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 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 A 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 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 ~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 |