Machining precautions for S690Q mechanical properties

Design of smelting composition and smelting process of SN400A, SN400B, SN400C steel, S690Q mechanical properties product: The smelting process adopts low-sulfur molten iron and low-sulfur scrap on the basis of the general process flow of steel for export, adding the refining process of LIIF furnace deep desulfurization and SiCa treatment. In this way, the sulfur content in the steel can be reduced, and the sulfide in the steel can be modified. Greatly improve the toughness of steel and improve the casting performance of molten steel, and increase the qualification rate of the tundish temperature to ensure smooth casting.

Fake and inferior steel plates are easy to scratch because of the simple equipment of the manufacturers of fake and inferior materials, which are easy to produce burrs and scratch the surface of the steel plate. Deep scratches reduce the strength of the S690Q mechanical properties, steel plate. The surface of the fake and inferior material is prone to cracks, because its billet is adobe, which has many pores. The adobe is subjected to thermal stress during the cooling process, and cracks are generated, and there will be cracks after rolling.

The steel market is full of good and bad, and the quotation is chaotic. The price of S690Q mechanical properties, spiral welded pipe is fluctuating. It is better to understand the market price of spiral welded pipe before purchasing. If it is a large project, the required quantity of spiral welded pipe is large, the price selection should be particularly careful, and we can select several suppliers for comparison. In addition, we shall not only consider the price, but also put an eye on the quality, the actual weight.

As the basic industry of the national economy, the steel industry is one of the most internationally competitive industries in my country. Li Xinchuang said: "During the new crown pneumonia epidemic, foreign steel companies have reduced production, suspended production or even shut down and withdrawn, while Chinese steel companies have basically maintained full capacity production, playing the role of 'ballast stone' in ensuring supply, protecting people's livelihood, and ensuring development."

Tags: S690Q mechanical properties