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Selection and Application Guide: corrosion resistant nickel alloy

Nickel alloy has excellent corrosion resistance, strength, toughness, metallurgical stability, processability and weldability. Many nickel alloys also have excellent heat resistance and are ideal for applications requiring high temperature strength and chemical resistance at high temperatures. The forging and rolling nickel base alloy (defined as the alloy containing more than 45% nickel) introduced here includes various forging and rolling corrosion-resistant alloys commonly used in chemical plants. The chemical composition and UNS number of these alloys are listed in Table 1. For the convenience of readers, some commonly used trade names are listed beside. Table.1 nominal chemical composition of corrosion resistant […]

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What is duplex stainless steel?

What is duplex stainless steel? Duplex stainless steel is a kind of stainless steel with ferrite phase and austenite phase coexisting. At the same time, it is also a kind of steel with excellent corrosion resistance, high strength, easy to manufacture and many other excellent properties. Duplex stainless steel has a history of more than 60 years. The first batch of duplex stainless steel in the world was produced in Sweden in 1930 and used in sulfite paper industry. In 1968, the invention of argon oxygen decarburization (AOD), a stainless steel refining process, made a series of new stainless steel […]

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What is high performance stainless steel?

What is high performance stainless steel? Due to the progress of modern metallurgical technology, stainless steel products have made a great leap forward. The corrosion resistance of some high-performance stainless steel in a certain environment has been able to replace some high-grade alloys such as nickel base alloy and titanium alloy, reducing the cost of the equipment, and also has superior comprehensive properties. High performance stainless steel can be divided into three categories: super austenitic stainless steel; super ferritic stainless steel; dual phase steel. Among them, super austenitic stainless steel is represented by AL-6XN, 904L, 33, 20cb-3, 926 alloy, etc.; […]

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Development history of Wenzhou stainless steel pipe industry

Wenzhou is one of the production bases of stainless steel seamless pipe in China. It originated in the early 1980s. After more than 20 years of development and exploration, Wenzhou has been well-known and influential in China’s domestic market. The historical stage of stainless steel development in Wenzhou The first stage: small workshops. The second stage: large scale production stage. The third stage: Group production stage. In the first and second stages, stainless steel production has been in short supply. In Wenzhou’s words, “Yongzhong is full of gold, and fools can make a lot of money.”. However, with the rise […]

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Other nickle-base alloys

Inconel 600 Alloy Inconel 600 alloy is a kind of Ni Cr alloy, which can be used in the temperature range from low temperature to 1093 ℃. Inconel 600 alloy has no magnetism and good welding performance. Inconel 600 alloy can be used in a wide range of corrosion environments. High nickel content makes alloy 600 have a certain corrosion resistance to reducing environment, while the addition of chromium makes alloy 600 have a certain corrosion resistance to weak oxidizing environment. Because of the high content of nickel, alloy 600 has excellent corrosion resistance to chloride stress corrosion cracking. The […]

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What is hastelloy alloy?

What is hastelloy alloy? Hastelloy steel is a kind of nickel base alloy, which is mainly divided into B, C and G series at present. It is mainly used in iron-based Cr Ni or Cr Ni Mo stainless steel, non-metallic materials and other occasions with strong corrosive media that cannot be used. It has been widely used in many fields such as petroleum, chemical industry, environmental protection and so on. Its grade and typical use occasions are shown in the table below. Designation of Hastelloy In order to improve the corrosion resistance, cold and hot working properties of Hastelloy, three […]

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What is angle bar and channel steel?

What is angle bar? Angle bar, commonly known as angle iron, is a long steel with two sides perpendicular to each other. There are equal angle steel and unequal angle steel. The width of two sides of an equal angle steel is equal. The specification is expressed in mm of side width × side width × side thickness. Such as “∟ 30 × 30 × 3”, that is to say, equal angle steel with side width of 30mm and side thickness of 3mm. It can also be expressed by model. The model is the centimeter of the side width, such […]

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Crack detection and judgment of angle bar

The angle bar in the transmission line tower needs the processing technology of opening angle, closing angle, bending and so on. In the production process, due to improper processing, the angle bar has cracks, and it is detected by ultrasonic according to the standard provisions. When the straight probe is used for detection, the detection direction of the straight probe sound beam is single, which is easy to form missed detection; when the oblique probe is used for detection of the diagonal steel edge, the ultrasonic wave produces the phenomenon of end angle reflection, and it is difficult to judge […]

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How are valves made?

How are valves made? At first glance, there are not many parts of the valves, simple structure and general accuracy. In the mechanical industry, they are simple parts, but the core sealing parts of the valve are particularly demanding. Valve manufacturing process is complex and difficult. Which process characteristics should we pay attention to? Manufacturing materials Due to the variety and specification of the valve, it is applied in various fields of national economy, and its application occasions vary greatly, such as high temperature and pressure, low temperature and deep cold, flammable and explosive, highly toxic, strong corrosive medium and […]

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What is oxide skin?

What is oxide skin? Oxide skin is the corrosion product of iron and steel caused by oxidation at high temperature. It consists of ferrous oxide, ferric oxide and ferric oxide. From the inside out: ferrous oxide, ferric oxide, ferric oxide. Among them, the structure of ferrous oxide is loose and the protective effect is weak, while the structure of Fe3O4 and Fe2O3 is dense and has better protective effect. Generally, the measures to reduce metal oxidation are: (1) when the material temperature is below 1000 ℃, the oxidizing furnace gas can be used, so that the oxide skin formed can […]

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