We received new order from Myanmar's Navy. It is about CCSB bulk cargo ship steel AH36 marine grade steel plates, which will be used to build ships. This is the third time we supplied marine grade steel materials for Myanmar's Navy. This time a new delegation team came to visit us and spoke highly about our production lines and our marine grade steel plates performance supplied CCSB bulk cargo ship steel to Myanmar's Navy before. Both of us expects a pleasant cooperation.
In the first quarter, CCSB bulk cargo ship steel, crude steel output in Asia amounted to 315.15 million mt, falling by 0.3 percent, with 234.45 million mt produced by China, up 1.2 percent, 24.36 million mt produced by Japan, decreasing by 2.4 percent, 27.5 million mt produced by India, falling by 5.3 percent, and 16.94 million mt produced by South Korea, down by 4.8 percent - with all comparisons on year-on-year basis.
CCSB bulk cargo ship steel annealing is to heat the steel to 30 ~ 50℃ above the critical temperature, keep it in the heat treatment furnace for a period of time, and then cool it down to room temperature with the furnace. The purpose of CCSB bulk cargo ship steel annealing is to refine the grain of steel, eliminate internal stress and reduce hardness, improve cutting performance, increase toughness and plasticity, and facilitate welding and rolling processes. CCSB bulk cargo ship steel annealing can be complete annealing, incomplete annealing, stress relief annealing, isothermal annealing and spheroidizing annealing.
How to prevent CCSB bulk cargo ship steel, steel plate cutting cracks? 1. Preheat the steel plate before cutting, and the preheating temperature depends on the quality grade and thickness of the steel plate. However, it needs to be heated evenly. 2. The cutting speed is reduced appropriately, but its reliability is not as good as preheating. It is suggested to preheat the cutting belt with flame gun cavitation several times before cutting, and the preheating temperature should reach about 180℃.
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