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| NK grade A |
NK grade A Marine steel with good toughness properties,higher strength.NK Grade A are mainly used to contribute hull of ships and the cranes of break bulker and vessels in low temperature oceans.All of our stock is the high quality NK Grade A shipbuilding steel plate.JoinWin has a large number of stocks.
NK Grade A, K A chemical composition in shipbuilding steel plate, angle steel bar, bulb flat bar, L section steel bar
Grade
|
C max
|
Si max
|
Mn
|
P max
|
S max
|
Als min
|
K A
|
0.21
|
0.50
|
≥ 2.5C
|
0.035
|
0.035
|
-
|
CE: C+1/6Mn ≤ 0.40%
Cu ≤ 0.35%,Ni ≤ 0.30%
NK Grade A, K A Mechanical Property in shipbuilding steel plate, angle steel bar, bulb flat bar, L section steel bar
Grade
|
Rm
(MPa)
|
Re(MPa) min
|
A% min
|
Akv/J min
| ||||||
E.T °C
|
Thickness (mm)
| |||||||||
≤ 50
|
>50-70
|
>70-100
| ||||||||
L
|
C
|
L
|
C
|
L
|
C
| |||||
K A
|
400-520
|
235
|
22
|
20
|
-
|
-
|
34
|
24
|
41
|
27
|
NK Grade A, K A shipbuilding steel plate, angle steel bar, bulb flat bar, L section steel bar delivery condition :
Grade
|
category
|
The thickness of steel
| ||||
≤ 12
|
>12.5-25
|
>25-35
|
>35-50
|
>50-100
| ||
K A
|
Plate/sheet
|
A(-)
|
N(-),TM(-)
CR(50)
AR*(50)
| |||
Profile steel
|
-
| |||||
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