The steel for shipbuilding and oil platform---Grade A shipbuilding steel, is the common tensile strength steel.
It is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.This kind of steel 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 shipbuilding steel Chemical Composition
| Grade | C max | Si max | Mn | P max | S max |
| Grade A shipbuilding steel | 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 shipbuilding steel Mechanical Property
| Grade | Rm (MPa) |
Re(MPa) min | A% min | Akv/J min | ||||||
| Grade A shipbuilding steel | 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.
Grade A steel plate Condition Of Delivery
| Grade | category | The thickness of steel | ||||
| ≤ 12 | >12.5-25 | >25-35 | >35-50 | >50-100 | ||
| Grade A shipbuilding steel | Plate/sheet | A(-) | N(-),TM(-) CR(50) AR*(50) |
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| 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 is Ton.(-) means without impact test.
Grade A shipbuilding steel Contrast in the different standard
| ASTM A131M | TOCT 5521 | JIS G3106 | BS LR | GB712 |
| Grade A shipbuilding steel | A | SM400A | A | A |
we are Grade A shipbuilding steel suppliers ,also can supply Grade A steel plate,Grade B steel plate,Grade D steel plate,Grade E steel plate,please contact us if you need
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