For the estimation in April and the second quarter, the estimation on March 16 is still valid, but the decrease in April is 10% higher than the neutral prediction. It is a conservative estimation based on 10% for the high probability event. In the second quarter, the output of overseas pig iron will be reduced by 11.67 million tons, affecting the demand for A283 Gr A CS steel carbon plate iron ore of about 1.84 million tons; in the first half of the year, the output will be reduced by 18.899 million tons, affecting the demand for iron ore of 32.13 million tons.
The structure of NM360 wear-resistant steel plate: The test found that whether it is a grinding ball, a forehead plate, or a hammer, after casting, it can get a structure based on wear-resistant steel after taking out air cooling at a temperature greater than 850℃. Transmission electron microscopy analysis of the metal thin film shows that there is a high density of dislocations in this type of wear-resistant slats, and there is an austenite film between the slats. Due to the high carbon content in this austenitic film, it has high stability. It is the shape of the A283 Gr A CS steel carbon plate, wear-resistant plate that makes the steel have a good combination of strength and toughness.
The quality grade symbols of Q235 steel plate are A, B, C and D respectively. Different grades represent different impact temperatures. A283 Gr A CS steel carbon plate, Q235A is not required for impact toughness test; Q235B is required for impact toughness test at room temperature (20 ℃); Q235C is required for impact toughness test at 0 ℃; Q235D is required for impact toughness test at - 20 ℃. For the above-mentioned B, C and D grade steels, Akv ≥27J is required under different temperature requirements. At different impact temperature, the impact value is also different.
Company tenet: first class quality and service to create corporate brand.Business philosophy: people-oriented, innovation, continuous improvement, the pursuit of excellence. Quality policy: carry forward the quality spirit, build a perfect quality management system, and put the quality strategy into every detail of the company's daily work.Environmental policy: waste reduction and pollution prevention, continuous improvement, and environmental protection.
