Category: stainless steel

Properties and classification of duplex stainless steel

The biphase in the name of the duplex stainless steel is mainly derived from the microstructure of the alloy. The duplex stainless steel usually contains about 50/50 austenite and delta ferrite phase mixture. Compared to austenitic stainless steel (for example, 304 or 316 stainless steel), duplex stainless steel has better corrosion resistance, especially chloride stress corrosion and […]

Attention to precipitation or aging hardening of stainless steel plates

Several methods can be used to increase the strength of stainless steel plates, which are alloying, quenching, working hardening, and a very common form of heat treatment, namely, precipitation or aging hardening. The so-called age hardening is in fact dependent on the formation of precipitates. In order to achieve the best combination of mechanical properties, the […]

What is the reaction of stainless steel plates and hydrogen

Hydrogen corrosion may occur in ammonia synthesis, hydrogen desulfurization and hydrogenation and petroleum refining units. Carbon steel is not suitable for high pressure hydrogen installations at temperatures above 232 C. Hydrogen can spread into the stainless steel plate and form methane at the grain boundary or in the pearlite zone with the iron carbide. Methane can not […]

Several processes of pickling and passivation on the surface of stainless steel plate

When the surface of the stainless steel plate is not annealed (for example, the surface after welding), drilling mud residue, rust-proof film, or ferrite impregnated with stainless steel after the molding process, the corrosion resistance of the stainless steel material will be directly affected. At this point you need to use acidic oil cleaning agent to do […]

What harm does salt spray corrosion cause to passivation film on the surface of stainless steel plate?

Salt spray corrosion will destroy the passivation film on the surface of the stainless steel plate, so that the decorative nature of the plate will be lost, and the mechanical strength of the material will be reduced. Some electronic components and electrical wiring will cause the power line to be interrupted due to corrosion, especially in […]

Several defects and solutions occurred during the welding of stainless steel plate

When stainless steel plates are welded, defects often occur. The causes of these defects are different. This article describes some of the defect classification and avoidance methods. Stoma The pores formed by the stainless steel plate weld can be divided into internal pores, surface pores, and joint pores. There are two types of internal pores, one is […]

How to remove the surface burr of stainless steel plate

The latest process of removing burr for stainless steel plate is electrolytic polishing, which requires a complete set of electrolytic polishing equipment for production, such as power supply, rectifier, polishing tank, workpiece hanger, heating facility, cathode and anode materials, several rinse frames, and stainless steel electrolytic polishing liquid. Let’s talk about burr related knowledge of stainless steel […]

Why are the price of 317L stainless steel flanges higher than 316 and 304 stainless steel flanges?

There are hundreds of different types of stainless steel flanges on the market, which may be difficult to find the perfect metal for your application. In many purchasing processes, the cost of metals is the first consideration rather than the performance of metals, but this is wrong. In some cases, additional costs are required for different high-performance alloys. […]

Polishing of stainless steel by surface processing

A variety of surface processing of stainless steel has widened its application field. Different surface processing makes the surface of stainless steel different, so that it is unique in its application. In the field of building applications, there are many reasons for the importance of surface processing of stainless steel. One, the basic types of surface processing […]

Structural detailed solution of shell and tube heat exchanger

Structural detailed solution of shell and tube heat exchanger The shell-and-tube heat exchangers mainly include structural types such as fixed tube-plate heat exchangers, floating-head heat exchangers, U-tube heat exchangers, and packing-type floating-head heat exchangers. The structure of the fixed-tube heat exchanger is simple. The low manufacturing cost can obtain a smaller shell inner diameter. The tube process can […]

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