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Production process of nickel-based alloy pipe
The nuclear steam generator heat transfer tubes are seamless tubes. Because the seamless tubes are integrally formed and have no welded joints, their pressure resistance and corrosion resistance are much better than welded tubes and become the preferred pipe for pressure pipes. Generally speaking...Read more -
Hot extrusion technology of seamless steel tube
When producing seamless steel tubes by hot extrusion, the tube blank must be a hollow billet. One is a hollow blank in which a forged billet or a billet is made into a hole, and the other is a hollow billet which is centrifugally cast. Perforation of billet or billet, depending on the type of ste...Read more -
Hot extrusion of steel pipes
Hot extrusion is extrusion at temperatures above the recrystallization temperature. Hot extrusion technology for steel materials The rapid development was achieved after the invention of the glass lubricant extrusion method by J. Sejournet of France in 1941. When hot-squeezing steel materials, in...Read more -
Extrusion characteristics of nickel-based alloy
The production of pipes is often extruded. From the international point of view, there has been a deep research on the extrusion of soft metals such as Mg, Al, Cu, etc. In about 1797, the British Braman designed. The world’s first mechanical extruder for lead extrusion has been patented. Fr...Read more -
Hot extrusion
Extrusion is the application of an external force to a metal blank placed in a container (squeezing cylinder) to flow out of a specific die hole to obtain a desired cross-sectional shape and size – mainly for stainless steel, nickel-based superalloys and hard The bar, tube and profile of th...Read more -
C-276alloy
C-276 alloy is an important nickel-based corrosion-resistant material. Because it contains about 16% (mass fraction) of Mo and Cr, it has strong resistance in both oxidizing and reducing media. It is called a general-purpose corrosion-resistant alloy. Compared with general stainless steel and oth...Read more -
825alloy
Alloy 825 is a nickel-iron-chromium solid solution strengthening alloy invented by Inco Corporation with molybdenum, copper and chin. It was developed for use in both reducing and oxidizing media. The alloy has resistance to chloride ion stress corrosion cracking, resistance to pitting, crevice c...Read more -
Effect of chromium on corrosion resistance of nickel
Figure 6-2 shows the effect of chromium on the constant potential anodic polarization of nickel. As the chromium content increases, the critical passivation current and the blunt current of the alloy decrease, and the passivation zone becomes wider, indicating that the corrosion resistance of nic...Read more -
Ni-Cr Alloy
The addition of chromium improves the corrosion resistance of nickel in oxidizing media, including oxidizing acids (HNO3,H2CrO4,H3PO4), oxidizing acid salts, and oxidizing alkaline salts. When the alloy contains more than 10% chromium, the corrosion resistance and oxidation resistance of the nick...Read more -
Pure Nickel
A silver-white transition metal with a glossy right is one of the elements with strong ferromagnetism at room temperature (the other two elements are iron and cobalt). In the entire temperature range below the melting point, the crystal structure of nickel is face centered cubic (fcc), and the la...Read more -
Corrosion resistance of Ni200 and Ni20
In the indoor atmosphere, Ni200 and Ni201 generally maintain a bright metallic luster. In the outdoor atmosphere, corrosion is slow due to a thin protective film on the surface. However, in the S02 industrial atmosphere, the corrosion rate increases with the increase of S02 content, and their cor...Read more -
Pure nickel 200 and Pure nickel 201
Pure nickel is a silver-white transition metal with a metallic luster and is one of the elements that have strong ferromagnetism at room temperature (the other two elements are iron and diamond). In the entire temperature range below the melting point, the crystal structure of nickel is face-cent...Read more -
SCC in high temperature pure water
In 1960 H. Coriou and his colleagues first announced that Inconel 600 alloy produces intergranular stress corrosion in degassed high-temperature pure water. The authenticity of the Inconel 600 alloy has been questioned for more than 20 years, and eventually the water in the nuclear power plant is...Read more -
Caustic Stress Corrosion of Nickel Base and Iron-Nickel Base Corrosion Alloys
In the caustic environment of NaOH aqueous solution, Ni-Cr alloy and Ni-Fe-Cr alloy have good stress corrosion resistance. Under a given medium, the stress corrosion behavior of the alloy is affected by the content of Cr and Ni in the alloy. Heat treatment conditions are constrained. The test res...Read more -
Stress corrosion
Nickel-base and iron-nickel-based corrosion-resistant alloys have been successfully applied in some dangerous service conditions because of their good stress corrosion resistance, good manufacturing performance, good toughness, and wide applicability to corrosive environments. However, in a wide ...Read more -
Welding tubes process for welded tubes
Welding tubes process for welded tubes We do welded tubes add-valuled process. http://www.shangdunmetals.com/uploads/c8c86c69.m4vRead more -
Selection of welding methods
Selection of welding methods : Various welding methods have different characteristics in terms of heating, process, operation, and economy. When welding stainless steel, various welding methods should be used according to the physical properties of various materials, metallurgical properties, and...Read more -
Undertake non-standard equipment welding
We undertake non-standard equipment welding,developing from single pipe line products to combining piping and fittings,welding parts together.Read more -
Puncture corrosion and crevice corrosion
Puncture corrosion and crevice corrosion are commonly encountered localized corrosion. After the point corrosion and crevice corrosion environments are determined, the alloy’s resistance to such localized corrosion depends on the composition of the alloy. Chromium and molybdenum play the mo...Read more -
Ni-Mo alloy
The typical representative of Ni-Mo alloy is Hastelloy B with 28% Mo. Since its application in the industry in 1929, its weldment has appeared near the weld seam. J mouth corrosion, and intergranular corrosion in the heat affected zone (HAZ). The phenomenon of welding deterioration seriously affe...Read more -
Ni-Cr-Mo alloy
Ni-Cr-Mo type corrosion-resistant alloy, which is resistant to both reducing medium and oxidizing medium, is a kind of corrosion-resistant alloy system with wide applicability. Among the most representative and widely used alloys of this type are Hastelloy® c with 16 070 Mo, introduced in the 193...Read more -
Intergranular corrosion of Ni-Cr alloy
The commonly used Ni-Cr alloy is the more widely used Inconel 600. The sensitizing temperature range of this alloy is very wide. At 300-850°C, Cr23c6 is precipitated. The intermetallic corrosion of Inconel 600 with a carbon content of only 0.017% is related to the sensitization temperature and ti...Read more -
Crystal corrosion
Intergranular corrosion is a type of corrosion that occurs in a narrow area between grains of a metallic material and is a type of localized corrosion. Early nickel-base and iron-nickel-based corrosion-resistant alloys were almost completely corroded. In the middle of the 20th century, the corros...Read more -
nickel and its corrosion resistant alloys in high temperature HCI gas—full corrosion (7)
The characteristics of HCI are similar to those of dry CI. There is also a critical temperature that causes the corrosion rate of metal materials to increase sharply. For some corrosion test data, see Table 2-27, Table 2-28, and Table 2-29. Combining these corrosion data, it can be considered tha...Read more -
Overall corrosion of nickel and its corrosion resistant alloys in high temperature hydrogen fluoride—full corrosion (6)
HF gas is a common medium for certain chemical processing. In high temperature hydrogen fluoride, Ni201, monel400, inconel 600, C-276 and 00Cr16Ni65Mo2Ti alloys all have suitable corrosion resistance, and have been successfully applied to practical engineering. Some corrosion test data are shown ...Read more -
Overall corrosion of nickel and its corrosion resistant alloys at high temperature F, CI −, HCI, HF, and BrF5 High-temperature fluorine—full corrosion (5)
Fluorine is the most powerful and most active halogen element. Its strongest oxidation potential makes it form compounds with all common elements. This property determines that it can react directly with the metal to form metal fluorides. The properties of the fluoride protective film are directl...Read more -
Corrosion in phosphoric acid—full corrosion (3)
Phosphoric acid is a kind of reducing inorganic acid, also called non-oxidizing acid. Its corrosiveness to the material depends on the type of phosphoric acid. Phosphoric acid and wet-process phosphoric acid are two types of phosphoric acid currently used in industrial applications. The former is...Read more -
Corrosion in nitric acid- full corrosion (1)
The corrosion resistance of nickel-based and iron-nickel-based corrosion resistant alloys in nitric acid depends on the chromium content of the alloy. The higher the chromium content in the alloy, the better the corrosion resistance. G-30 alloy and 690 alloy exhibit the best corrosion resistance ...Read more -
Comprehensive Corrosion of Nickel and Its Corrosion Alloy in Alkaline Solution—full corrosion (2)
In caustic, universal austenitic stainless steels can only be used below 100oC in concentrations below 50%. Nickel and its corrosion resistant alloys exhibit excellent resistance to caustic alkali corrosion, and the corrosion resistance of the alloy increases as the nickel content increases. Prac...Read more -
Corrosion of nickel, nickel-base and iron-nickel base corrosion resistant alloys in HF acid
HF acid is a reductive inorganic acid widely used in chemical processing. The industrially applicable HF acid concentration ranges from 30% to 70% HF aqueous solution and anhydrous HF. Although chemically classified, HF acid is a weak acid relative to hydrochloric acid and sulfuric acid, but its ...Read more -
Overall corrosion
Full corrosion can occur in acids, salts, aqueous alkalis, and some corrosive gases. When the composition of the alloy is confirmed, the two dominant factors affecting its overall corrosion resistance are material and environmental effects. Material factors are heat treatment and thermal history,...Read more -
In hydrochloric acid — Corrosion of nickel, nickel-base and iron-nickel base corrosion resistant alloys in acid solution
Hydrochloric acid is one of the most aggressive corrosive reducing acids, and its corrosion to metal materials was a major technical problem that the corrosion resistant structure was difficult to solve. The corrosion rate of industrial pure nickel 200,201 and nickel-copper alloy Monel 400 in roo...Read more -
A variety of corrosion characteristics
Corrosion in general: In corrosive environments, bare metal surfaces are uniformly thinned by chemical and electrochemical reactions, also known as uniform corrosion, often at the corrosion rate g / m².h or the corrosion rate mm / a to determine the alloy’s Corrosion resistance. Local corro...Read more -
General Corrosion of nickel based alloys
In the case of a large amount of Cr, Mo, W and other alloying elements, high contain nickel alloys can still maintain the austenitic structure, it is still austenitic alloy easy forming, easy welding, etc., which is widely favored by this alloy The main reason. In the iron-based austenitic stainl...Read more -
Stainless steel processing technology
Stainless steel processing technology refers to the performance of stainless steel with stainless steel shear, folding, bending, welding and other mechanical processing of the final production of stainless steel products needed for the process, in the process of stainless steel processing with a ...Read more -
Stainless steel pickling passivation principle
Stainless steel corrosion resistance can be mainly due to the surface covered with a layer of very thin (about 1nm) dense passivation film, the film 1n corrosion medium isolation, stainless steel protection is the basic barrier. Stainless steel passivation has a dynamic character and should not b...Read more