ASTM A131 DH32 steel for shipbuilding is not only the high tensile strength steel but also is the Hull structural steel with good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and good welding properties.Shipbuilding steel grade DH32 is used for shipbuilding and oil platform purpose and they are approved by ABS,DNV,GL,BV,LR,NK,RINA and other classification societies.What's more, DH32 shipbuilding steel plate can be used in manufacturing the ship's hull structure whose weight is below 10000 tons.
DH32 Shipbuilding steel plate specification:
Thickness: 4mm to 260mm,
Width: 1200mm to 4000mm
Length: 3000mm to 18000mm.
DH32 shipbuilding steel plate Chemical Composition %
Grade | C max | Si max | Mn | P max | S max | Als min | Ti max | Cu max | Cr
max | Ni
max | Mo
max |
| DH32 | 0.18 | 0.50 | 0.90-1.60 | 0.035 | 0.035 | 0.015 | 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.
DH32 shipbuilding steel plate MechanicaL Property
Grade | Rm
(MPa) | Re(MPa) min | A% min | Akv/J min |
| DH32 | 440-570 | 315 | 22 | E.T °C | Thickness (mm) |
| -20 | ≤ 50 | >50-70 | >70-100 |
| L | C | L | C | L | C |
| 31 | 22 | 38 | 26 | 46 | 31 |
Note: In the list , Rm: .tensile strength,Re: Yield strength,A%: elongation, E.T: experimental temperature,L: lengthways, C: crosswise.
DH32 shipbuilding steel plate Condition Of Delivery
Grade | Fine grains elements | category | The thickness of steel |
| ≤ 12 | >12.5-20 | >20-25 | >25-35 | >35-50 | >50-100 |
| DH32 | Nb+V or V | Plate/
sheet | A(50) | N(50),CR(50),TM(50) | N(50),CR(25),TM(50) |
| Profile steel | N(50),CR(50),TM(50),AR*(25) | - |
| Al or Al+Ti | Plate/
sheet | A(50) | AR*(25) | - |
| N(50),CR(50),TM(50) | N(50),CR(25),TM(50) |
| 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.
DH32 shipbuilding steel plate Contrast in the different standard
ASTM A131M | TOCT 5521 | JIS G3106 | BS LR | GB712 |
| DH32 | D32 | SM490B
SM490C | DH32 | D32 |
