impact resistance of nm400 steel plate 500 tons exported to Pakistan

The strengthening mechanisms in metals mainly include solid solution strengthening, dislocation strengthening, fine grain strengthening, and second phase (precipitation and dispersion) strengthening. Alloying elements have the most significant strengthening effect on steel in the quenched and tempered state, because it makes full use of all four strengthening mechanisms. Martensite is formed during quenching, and carbides are precipitated during tempering, resulting in a strong second phase strengthening and greatly improving toughness. Therefore, obtaining martensite and tempering it is the most economical and effective comprehensive strengthening method for impact resistance of NM400 steel plate.

Machining of impact resistance of NM400 steel plate, wear resistant steel plate: wear resistant steel plate has good cutting and shearing properties. During machining, the cutting tools and feeding speed should be used reasonably according to the hardness of steel plate. Common tools are made of high speed steel or cemented carbide steel, and carbide surface tools are required for grinding. Wear resistant steel plate can be welded to structural steel by arc welding.

The main reference for structural design of steel structure engineering is the static and dynamic characteristics of the steel used under various actions, such as elasticity, plasticity, strength, toughness, fatigue and other mechanical properties. Therefore, the impact resistance of NM400 steel plate and so on steel used in the construction of steel structure engineering will limit its strength, plasticity, impact toughness and weldability. Steel structure engineering requires high tensile strength and yield point of steel. High yield point can reduce the cross-section of the component, so as to reduce the weight, save steel and reduce the cost. High tensile strength can increase the safety of the structure.

On March 17, the Ministry of Finance and the State Administration of Taxation jointly issued the announcement on increasing the export tax rebate rate of some products, and the relevant adjustments will be implemented from March 20. This adjustment involves 60 tariff numbers of steel products. After the adjustment, the impact resistance of NM400 steel plate etc. steel products with the original export tax rebate rate of 10% will be fully refunded, which is great news for both steel exporters and our customers.