6. The type steel is Q235B steel, and the plate is Q345B steel. 7, The steel is HPB300 grade steel, HRB335 grade steel and HRB400 grade steel. Reinforcement method. 1, the frame column (JGZ) of the project should be strengthened with the CFRP wrap.
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,GB/T700 Q235B mild steel plate., ASTM A131 shipbuilding steel has different grade levels The ordinary strength shipbuilding steel grades are grade A/B/D/E Their min yield strength is 235 Mpa, and tensile strength is 400-520 Mpa The higher strength shipbuilding steel grades are grade AH32/DH32/EH32/FH32, AH36/DH36/EH36/FH36 AH40/DH40/EH40/FH40
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