What is carbon TM rolled GL-AH 40 hull steel plate equivalent to

TM rolled GL-AH 40 hull 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. The min. yield strength of AH32/DH32/EH32/FH32 steel is 315 Mpa, and tensile strength is 440-590 Mpa. The min. yield strength of AH36/DH36/EH36/FH36 steel is 355 Mpa, and tensile strength is 490-620 Mpa. The min. yield strength of AH40/DH40/EH40/FH40 steel is 390 Mpa, and tensile strength is 510-650 Mpa.

As of the week of November 13, China's total coke inventory was 7,240,400 tons, the overall level is still low, but it increased by 1.64% from the beginning of the month, and an increase of 120,000 tons during the week. This part of the increase mainly occurred downstream. Inventories of 110 Chinese steel mills increased by 12%, and the Rizhao Port Depot, which remained low in the previous period, also increased by 60,000 tons. If subsequent coke inventories continue to rise, disk prices will be under pressure under bearish expectations, and coking profits will also shrink from high levels.

At present, the cutting thickness limit of laser cutting is 20 mm. However, it should be noted that oxygen will be added into the laser beam to cut 20 mm thick TM rolled GL-AH 40 hull steel plate steel plate, which will form a thin oxide film on the cutting surface, which may affect the cutting quality, Therefore, attention should be paid to this point to avoid problems.

High strength steel is mainly used in offshore engineering, lifting equipment, construction machinery, container storage tank and other important steel structures with harsh working conditions, hoping to reduce weight. The application of TM rolled GL-AH 40 hull steel plate, high strength steel can not only reduce material cost, transportation cost and production cost, but also save welding material consumption, welding work hour; reduce post welding stress, preheating temperature and post weld heat treatment requirements.