Manufacturer supplies 4J33 stainless steel rod at wholesale price per piece

Manufacturer supplies 4J33 stainless steel rod at wholesale price per piece

Mainly used for matching and sealing with ceramics, it is an important sealing structural material in the electric vacuum industry.

1.1 4J33 material grade 4J33.The performance test samples for the expansion coefficient and low-temperature stability specified in the 4J33 heat treatment system standard shall be heated to 900 ℃± 20 ℃ in a protective atmosphere or vacuum, held for 1 hour, and cooled to below 200 ℃ at a rate not exceeding 5 ℃/min before being taken out of the furnace.Application Overview and Special Requirements: This alloy has been used in aviation factories for a long time and has stable performance. Mainly used for sealing electric vacuum components with Al2O3 ceramics. Manufacturing electrodes, lead out plates, and lead out wires for large electronic tubes and magnetrons. In use, the selected ceramic should match the expansion coefficient of the alloy. When selecting alloys, the low-temperature stability should be strictly tested according to the operating temperature. Proper heat treatment should be carried out during the processing to ensure that the material has good deep drawing and drawing properties. When using forged materials, their airtightness should be strictly inspected.

Manufacturer supplies 4J33 stainless steel rod at wholesale price per piece

The competitive landscape of the steel industry is constantly upgrading and iterating. 2012 was the year that the steel industry faced after the "4 trillion yuan investment plan"oneA cold winter, and even worse in 2015. Taking 2012 as the dividing line, it can be seen that although there were cyclical fluctuations in industry profits before, the overall pressure of elimination was not significant. The pressure of elimination has been increasing since 2012, and even though the industry has maintained profitability since 2016, some steel companies still face the pressure of being eliminated. Therefore, the key word for the competitive landscape of the industry before 2012 can be summarized as "big". Expanding is a strategy for many steel companies, and the wave of mergers and acquisitions before 2012 was a typical manifestation of this strategy.

When the alloy composition is inappropriate, different degrees of transformation from austenite (γ) to needle like martensite (α) will occur at room temperature or low temperature. The phase transition is accompanied by volume expansion effect. The expansion coefficient of the alloy corresponds to * * *, resulting in a significant increase in internal stress of the sealing component and even causing partial damage. The main factor affecting the low-temperature stability of alloys is the chemical composition of the alloy. From the Fe Ni Co ternary phase diagram, it can be seen that nickel is the main element for stabilizing the austenite (γ) phase, and a high nickel content is beneficial for the stability of the γ phase. As the total deformation rate of the alloy increases, it tends to stabilize. The compositional segregation of alloys may also cause localized gamma → alpha phase transitions. In addition, coarse grain size can also promote the gamma → alpha phase transition [2,5,6].

Our company has the supply capability of timely delivery, on-demand rolling, and on-demand cutting processing, ensuring accurate and rapid provision of qualified products to customers. Our expertise lies in the supply of imported materials, including plates, strips, bars, pipes (welded pipes, seamless pipes), fittings, flanges, and steel plate cutting parts (thickness 2-200mm). Whether you need 1 kilogram or 10 tons, we have the ability to supply you in a timely manner through our own inventory, air freight, and sea freight. The materials we provide have been widely used in complex environments such as high temperature and strong corrosion, representing industries such as heat treatment, smelting, environmental protection, pharmaceuticals, papermaking, pressure vessels, heat exchange, electric furnaces, and power equipment.