A131 Grade A steel plate is common strength marine grade steel plate. It is mainly used to build hull of vessels and ship body. The Air rolled and Control Rolled are common rolling states for ASTM A131 grade A steel plate with equal and below 40mm thickness. And for ASTM A131 grade A steel plate whose thickness above 40mm, the heat treatment shall be Normalised or TMCP, so as to improve the A131 grade A steel plate strength.
ASTM A131 grade A steel plate strength：
| Grade | Yield Strength | Tensile Strength | Elongation |
| A131 grade A | Min Mpa | Mpa | Min % |
| 235 | 400-520 | 18 |
BBN steel is world class raw steel materials supplier and service provider. Other than ASTM A131 grade A steel plate, BBN steel also supply other relative steel grades in ASTM A131, such as A131 Grade A oil platform steel plate, A131 Grade B shipbuilding steel plate, A131 Grade D marine steel plate, A131 Grade E off-shore steel plate, A131 Grade AH32 ship steel plate, A131 Grade AH36 steel plate, A131 Grade AH40 Naval steel plate, A131 Grade DH32 High strength ship plate, A131 Grade DH36 ship plate, A131 Grade DH40 platform steel plate, A131 Grade EH32 shipbuilding plate, A131 Grade EH36 steel plate, A131 Grade EH40 ship plate, A131 Grade FH32 shipbuilding steel,A131 FH36 shipbuilding steel, A131 Grade FH40 marine grade steel plate, and so on.
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