Auteur : YinTuo

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Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the development and production of high-quality austenitic stainless steel seamless pipe, nickel-nickel alloy and seamless pipe.

Austenitic stainless steel has excellent corrosion resistance and is widely used in chemical machinery, pharmaceutical machinery and food machinery. However, due to the low hardness of austenitic stainless steel and poor wear resistance, the surface properties of austenitic stainless steel that require wear resistance are difficult to meet the requirements of use, which greatly reduces the service life of these mechanical parts. . People have been looking for how to improve the wear resistance of austenitic stainless steel without reducing its corrosion resistance. Among them, the austenitic stainless steel ion heat treatment process and equipment are simple, and it is a very promising new technology for surface hardening treatment of austenitic stainless steel.

The surface of austenitic stainless steel can be hardened by using ion heat treatment technology at low temperature (nitriding<450℃, carburizing<550℃) to form a layer of supersaturated solid solution of nitrogen or carbon on the surface, and there must be no chromium Nitrides or carbides precipitate, and the structure with this characteristic is called S phase. The surface hardness of the hardened austenitic stainless steel is as high as 900HV, and its corrosion resistance is even better than that of the original austenitic stainless steel.

The key to surface hardening of austenitic stainless steel is how to control the temperature of the workpiece. If the temperature is low, the infiltration rate will be slow, and even nitrogen or carbon atoms will not penetrate into the matrix; if the treatment temperature is high, the infiltrated nitrogen or carbon will form chromium nitrides or carbides, reducing the concentration of free chromium on the surface of the stainless steel , The corrosion resistance of stainless steel decreases. Therefore, the surface hardening treatment temperature of austenitic stainless steel must be strictly controlled within ±5°C, which is difficult to achieve in general ion heat treatment equipment.

We are constantly moving forward, but we also see the stars and ambitious ambitions. For more information, please contact us: https://www.yintuosteel.com/product/super-austenitic/super-austenitic-stainless-steel-seamless-pipe-and-tube.html . Christmas time is here. I hope you have a wonderful New Year. May hold happy hours for you.

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Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the development and production of high-quality ferritic stainless steel seamless pipe and tube and nickel-nickel alloys. The following introduces ferritic stainless steel.

Formability of ferritic stainless steel

The uses of ferritic stainless steel are so extensive, and the properties of ferritic stainless steel required for each use are different. However, the formability of ferritic stainless steel is worse than that of austenitic stainless steel such as 304 steel. Although the y value of ferritic stainless steel, that is, the deep drawability index, varies in a wider range from 1.0 to 2.0, the n value, that is, the ductility index is limited, about 0.2, which is higher than 0.4 to that of austenitic stainless steel. 0.65 is low. For drawn products, it is difficult to use ferritic stainless steel to replace austenitic stainless steel. If you want to replace it, you must change the design of the product and design it into a drawn shape.

Toughness of ferritic stainless steel

There have been many studies on the effect of titanium and niobium on the pressure formability, the focus is mainly on the average y value, and the conclusion is that the appropriate amount of these elements can effectively improve the pressure formability. However, excessive addition of these elements can also have harmful effects. For example, as the content of titanium and niobium increases, the transformation temperature of longitudinal cracks also increases. Even though ferritic stainless steel has a good average γ value, the ductile brittleness transition temperature may damage the deep drawability. Since the transformation temperature is one of the decisive factors for formability, deformation may be difficult to proceed at a higher transformation temperature.

We are constantly moving forward, but we also see the stars and ambitious ambitions. For more information, please contact us: https://www.yintuosteel.com/product/austenitic/austenitic-stainless-steel-seamless-tube.html

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Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the development and production of high-quality stainless steel seamless tubes and nickel-nickel alloys. If you are interested in us, welcome to contact us: https://www.yintuosteel.com/product/ferritic/ferritic-stainless-steel-seamless-pipe-and-tube.html Now let’s introduce ferritic stainless steel seamless pipe and tube.

Application areas: electronic appliances, metal stamping parts, spring shrapnel, cushion diaphragm, precision parts, accessories, bellows, seals, etching parts, kitchen equipment sink (SINK), general drawing material (high surface requirements), gas stove- High surface requirements Refrigerators (freezers), electrical appliances, washing machines, dryers, microwave ovens, decorative pipes, structural pipes (industrial use), construction materials for pipes MIRROR (mirror surface materials), regrind the interior and exterior decorative materials of elevator buildings, windows and doors, chemical equipment, heat exchange Boiler, tank, etc.

The first category: 409: suitable for non-corrosive or slightly corrosive environments, such as containers, coaches, cars, display frames, etc.

The second category: 430 is the most widely used, and most of its properties are similar to 304. It is generally used indoors and has good corrosion resistance. Typical 430 is often used as an alternative to 304, used in kitchen facilities, dishwashers, pots, pots, etc.

The third category: 430Ti, 439, 441, etc.: good weldability and formability, in most cases better than 304, used in water tanks, heat exchange tubes (sugar industry, etc.), automobile exhaust systems, welding parts of washing machines, third Class grades can even replace 304 for occasions with higher performance requirements.

The fourth category: 434,436,444: adding molybdenum to increase corrosion resistance, used in hot water tanks, solar water heaters, automobile exhaust systems, electric kettles, microwave oven parts, etc. The corrosion resistance of 444 is equivalent to that of 316.

The fifth category: 446,445,447, etc.: more chromium and molybdenum improve corrosion resistance and oxidation resistance, corrosion resistance and oxidation resistance are better than 316, typical use coastal and other corrosion-resistant environments, JIS447 corrosion resistance is equivalent to metal titanium .

We are constantly moving forward, but we also see the stars and ambitious ambitions. For more information, please contact us: https://www.yintuosteel.com/product/austenitic/austenitic-stainless-steel-seamless-tube.html 

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Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the development and production of high-quality stainless steel seamless pipe and nickel-nickel alloys. One of the products we mainly promote is ferritic stainless steel seamless pipe and tube.If you are interested in us, please contact us:https://www.yintuosteel.com/

Ferrite is an interstitial solid solution in which carbon is dissolved in α-Fe, and is often represented by the symbol F. With a body-centered cubic lattice, its carbon dissolving ability is very low, it can only dissolve 0.0008% of carbon at room temperature, and the maximum carbon dissolving ability is 0.02% at 727°C. It is called ferrite or α solid solution, and it is represented by α or F. α is often used in phase icon notes, and F is often used in writing. The austenite of the hypoeutectoid component forms ferrite by pre-eutectoid precipitation.

The ferrite grain boundary is smooth, twin crystals or slip lines are rarely seen in the grain, the color is light green, shiny, and dark after deep corrosion. Ferrite in steel exists in flakes, blocks, needles and nets.

This part of ferrite is called proeutectoid ferrite or free ferrite in the structure. Depending on the formation conditions, proeutectoid ferrite has different morphologies, such as equiaxed, along-crystal, spindle, zigzag, and acicular. Ferrite is also the matrix of pearlite structure. In the hot-rolled (normalized) and annealed structures of carbon steel and low-alloy steel, ferrite is the main component phase; the composition and structure of ferrite have an important influence on the process performance of steel. The performance also has an impact.

Carbon dissolves into δ-Fe to form interstitial solid solution, which has a body-centered cubic lattice structure. Because of the higher temperature, it is called high-temperature ferrite or δ solid solution. It is expressed by δ and exists above 1394℃.

The maximum amount of dissolved carbon is at 1495℃. The mass fraction of carbon is 0.09%.

We are constantly advancing on the ground, but we also see the stars and ambitious ambitions. For more information, please contact us: manufacturer of austenitic stainless steel seamless tube.

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Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. is a professional supplier of stainless steel seamless pipes, including the production of alloy steel seamless pipe. If you are interested, please contact us:https://www.yintuosteel.com/

Seamless steel pipes have a wide range of uses. General seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipes. Or structural components used to transport fluids. Seamless steel pipes have a hollow section and are used in large quantities for transporting fluids, such as pipelines for transporting oil, natural gas, natural gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe is lighter in weight, but has the same bending and torsion strength, and is economical section steel.

Alloy seamless steel pipe is a kind of seamless steel pipe, and its performance is much higher than that of ordinary seamless steel pipe. Because this steel pipe contains more Cr, its high temperature resistance, low temperature resistance and corrosion resistance are other seamless steel pipes. Not comparable, so alloy tubes are widely used in petroleum, chemical, electric power, boilers and other industries. Alloy steel seamless pipes are highly demanding tubular products in many industries such as chemical industry, power generation, oil and gas refineries, petroleum, construction, food processing, and paper and pulp production. These alloy steel seamless pipes are composed of chromium, molybdenum and manganese as reinforcing agents and have excellent corrosion resistance and high tensile strength.

Its main materials are: 12Cr1MoV, P22 (10CrMo910) T91, P91, P9, T9, WB36, Cr5Mo (P5, STFA25, T5,) 15CrMo (P11, P12, STFA22), 13CrMo44, Cr5Mo, 15CrMo, 25CrMo, 30CrMo, 40CrMo.

We create products with care. In addition to alloy steel seamless pipe, we also provide nickel alloy seamless pipe and tube. If you want to learn more, you can click the following link: https://www.yintuosteel.com/

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Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. mainly provides the development and production of stainless steel seamless pipes. It is a professional Stainless Steel Pipe Manufacturers. If you want to learn more about it, please continue reading.

The company specializes in the development and production of high-quality stainless steel seamless pipes and nickel-nickel alloys. Base alloy seamless pipe with an annual output of 10,000 tons. The entire seamless pipe production line adopts the domestic leading cold rolling combined drawing process as the main process, and is supplemented by cold drawing. The application of this product involves petroleum, chemical industry, machinery manufacturing, instrumentation, shipbuilding, military industry, power station, papermaking, food and other industries.

Let me introduce the benefits of stainless steel: Stainless steel is durable and a useful material for pipes and pipes. Compared with other metals, pipes and fittings made of stainless steel require less maintenance, are easier to clean and have a longer service life. Stainless steel has properties such as corrosion resistance, making it ideal for outdoor and indoor applications. It is a strong material, easy to recycle, and can withstand stress better than other metals.

Stainless steel is a universal material. When used in the manufacture of pipes and fittings, it can be widely used for the following purposes:

1. Construction-structural support and scaffolding

2. Automotive-HVAC and water flow system

3. Home and office-drain pipe

4. Material transportation-hot water, chemicals, oil and natural gas

5. Sewage treatment system-including industrial water pipes

Cold rolling is the preferred production process for high-precision seamless pipes. Most of our stainless steel pipes and mechanical pipes are made by cold rolling. This technology can provide higher forming speed, narrow tolerances and good turnouts. Now, in this process, the maximum diameter we can obtain is 219 mm.

Cold drawing is a common process for our stainless steel pipes. The seamless pipe obtained from this process can get a very narrow tolerance range and maintain good chemical elements. In addition, the cold drawing process is an ideal choice for situations that have high requirements on the quality of the surface structure.

We are enterprising with a solid attitude, but at the same time we are also watching the stars and ambitious ambitions. If you are interested and want to buy Stainless Steel Seamless Pipe, please contact us!

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Huzhou Nanxun Changyin Special Material Technology Co., Ltd. is a professional manufacturer of Stainless Steel Seamless Pipe. Today we will introduce the concept and characteristics of stainless steel seamless steel tubes. If you are interested, let’s read on:

Stainless steel seamless steel pipe is a long steel with a hollow section and no joints on the periphery. It is a steel pipe resistant to corrosion by weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt. Also known as stainless acid-resistant steel pipe.

Features of seamless stainless steel pipe:

1. The thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, its processing cost will rise substantially.

2. The process of this product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness on the inside and outside of the pipe, high cost of sizing, and there are pits and black spots on the inside and outside that are not easy to remove.

3. Its detection and shaping must be processed offline. Therefore, it embodies its superiority in terms of high pressure, high strength, and mechanical structure materials.

The corrosion resistance of stainless steel seamless pipes depends on the alloying elements contained in the steel. Chromium is the basic element for the corrosion resistance of stainless steel. When the chromium content in the steel reaches about 12%, the chromium interacts with the oxygen in the corrosive medium to form a very thin oxide film (self-passivation film) on the surface of the steel. , Can prevent further corrosion of the steel matrix. In addition to chromium, the alloying elements commonly used in stainless steel seamless pipes include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of various uses for the structure and performance of stainless steel.

Stainless steel seamless pipe is a hollow long round steel, widely used in petroleum, chemical, medical, food, light industry, machinery and instrumentation and other industrial pipelines and mechanical structural parts. In addition, when the bending and torsion strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also often used to produce various conventional weapons, barrels, and shells.

Huzhou Nanxun Changyin Special Material Technology Co., Ltd. specializes in the development and production of high-quality stainless steel seamless tubes and nickel-nickel alloys. If you want to order or wholesale Stainless Steel Seamless Pipes, you can click on the link below: Stainless Steel Pipe Manufacturers.

Chargement...

Huzhou Nanxun Changyin Special Material Technology Co., Ltd. is a professional manufacturer of Stainless Steel Seamless Pipe. Today we will introduce the concept and characteristics of stainless steel seamless steel tubes. If you are interested, let’s read on:

Stainless steel seamless steel pipe is a long steel with a hollow section and no joints on the periphery. It is a steel pipe resistant to corrosion by weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt. Also known as stainless acid-resistant steel pipe.

Features of seamless stainless steel pipe:

1. The thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, its processing cost will rise substantially.

2. The process of this product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness on the inside and outside of the pipe, high cost of sizing, and there are pits and black spots on the inside and outside that are not easy to remove.

3. Its detection and shaping must be processed offline. Therefore, it embodies its superiority in terms of high pressure, high strength, and mechanical structure materials.

The corrosion resistance of stainless steel seamless pipes depends on the alloying elements contained in the steel. Chromium is the basic element for the corrosion resistance of stainless steel. When the chromium content in the steel reaches about 12%, the chromium interacts with the oxygen in the corrosive medium to form a very thin oxide film (self-passivation film) on the surface of the steel. , Can prevent further corrosion of the steel matrix. In addition to chromium, the alloying elements commonly used in stainless steel seamless pipes include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of various uses for the structure and performance of stainless steel.

Stainless steel seamless pipe is a hollow long round steel, widely used in petroleum, chemical, medical, food, light industry, machinery and instrumentation and other industrial pipelines and mechanical structural parts. In addition, when the bending and torsion strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also often used to produce various conventional weapons, barrels, and shells.

Huzhou Nanxun Changyin Special Material Technology Co., Ltd. specializes in the development and production of high-quality stainless steel seamless tubes and nickel-nickel alloys. If you want to order or wholesale Stainless Steel Seamless Pipes, you can click on the link below: Stainless Steel Pipe Manufacturers.