Henan BEBON international co.,ltd
Bebon steel —— The most professional exporter on weathering resistant steel
Tel:0086-371-86151527 E-mail:[email protected]
Fax: 0086-371-86011881 MSN:[email protected]
Skype:bebonchina Web:http://www.shipbuilding-steel.com
http://www.bebonchina.com
Oficina Dir: 2801 B# Intermational enteprise center Zhengzhou city in China.
DNV A32 shipbuilding steel plate and sheet
DNV A32 Steel Description:
The steel for shipbuilding and oil platform‐‐‐A32, is the high tensile strength steel.
DNV A32 is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion‐
resistance,the processing properties,and welding properties.
DNV A32 Steel Application :
DNV A32 steel can be used in the manufacture of the ocean ship's hull structure whose weight is above
10000 tons. A32 with high strength, good toughness low temperature impact , excellent weldability
characteristics, is a kind of high strength ship's hull structure plate. So DNV A32 is used to manufacture
medium‐sized ocean, coastal and river trade area ship's hull structure.
DNV A32 Steel chemical composition by [%]:
Grad
e
C
ma
x
Si
ma
x
Mn P
max
S
max
Als
min
Ti
max
Cu
max
Cr
max
Ni
max
Mo
max
DNV
A32
0.1
8
0.5
0
0.90‐
1.60
0.03
5
0.03
5
0.01
5 0.02 0.35 0.20 0.40 0.08
Note: Generally speaking CE will be ≤ 0.40%. If the delivery condition is TMPC, the CE will be : ≤ 0.36%
(thickness ≤ 50mm),≤0.38%( when the thickness >50‐100).
Ceq% =(C+Mn)/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
Henan BEBON international co.,ltd
Bebon steel —— The most professional exporter on weathering resistant steel
Tel:0086-371-86151527 E-mail:[email protected]
Fax: 0086-371-86011881 MSN:[email protected]
Skype:bebonchina Web:http://www.shipbuilding-steel.com
http://www.bebonchina.com
Oficina Dir: 2801 B# Intermational enteprise center Zhengzhou city in China.
As for A32, if the thickness is under 12.5mm, the minimum Mn is about 0.7%. Besides, aluminum, niobium or
vanadium in which one or several elements of grain refinement elements should be added to A32 Steel.
DNV A32 Steel Mechanical properties:
Grade Rm
(MPa)
Re(MPa
) min
A%
minAkv/J min
E.T °C Thickness (mm)
≤ 50 >50‐
70
>70‐
100
L C L C L C
DNV
A32
440‐
570 315 22
0
3
1
2
2
3
8
2
6
4
6 31
Note: In the list , Rm: .tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L:
lengthways, C: crosswise.
Because this steel contains a small amount of V, Ti, Nb and other elements of grain refinement, and in order to
reduce the hardening tendency of cracks to prevent cold(ing) crack, the use of welding wire energy may be
more.
DNV A32 Steel Delivery state:
The thickness of steel
Grade
Fine
grains
elements
categor
y ≤ 12 >12.5‐
20
>20‐
25
>25‐
35
>35‐
50 >50‐100
Henan BEBON international co.,ltd
Bebon steel —— The most professional exporter on weathering resistant steel
Tel:0086-371-86151527 E-mail:[email protected]
Fax: 0086-371-86011881 MSN:[email protected]
Skype:bebonchina Web:http://www.shipbuilding-steel.com
http://www.bebonchina.com
Oficina Dir: 2801 B# Intermational enteprise center Zhengzhou city in China.
Plate/
sheet N(50),CR(50),TM(50)
N(50),CR(2
5),TM(50) Nb+V or V
Profile
steel
A(50
) N(50),CR(50),TM(50),AR*(25) ‐
AR*(25) ‐ Plate/
sheet A(50)
N(50),CR(50),TM(50) N(50),CR(2
5),TM(50)
DNV
A32
Al or Al+Ti
Profile
steel
A(50
) N(50),CR(50),TM(50),AR*(25) ‐
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 is Ton.(‐) means without
impact test.
Contrast in the different standard
ASTM A131M TOCT 5521 JIS G3106 BS LR GB712
AH32 A32 SM490B
SM490C AH32 A32
Henan BEBON international co.,ltd
Bebon steel —— The most professional exporter on weathering resistant steel
Tel:0086-371-86151527 E-mail:[email protected]
Fax: 0086-371-86011881 MSN:[email protected]
Skype:bebonchina Web:http://www.shipbuilding-steel.com
http://www.bebonchina.com
Oficina Dir: 2801 B# Intermational enteprise center Zhengzhou city in China.
Shipbuilding steel,generally speaking,a hull structure steel , is to manufacture hull as the requirements of
register of shipping. Shipbuilding steel includes four grades,that is A,B,C,D. Grade A means impact test at 20°C;
Grade B is impact test at 0°C; Grade C means impact test at ‐20°C; Grade D is impact test at ‐40°C. DNV A32
shipbuilding plate has low alloy content, grain refinement elements like V, Ti, Nb, etc. Welding performance is
superior. Preheating before welding is generally not proceeded, but it is done if it is at a low temperature or
super thickness of structural components is welded, that is , it needs to take preheating measures.
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