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What are the performance characteristics of S38815 high silica stainless steel?

S38815 stainless steel is a special high alloy stainless steel with unique properties and wide applications. In this article, we will introduce the characteristics of S38815 stainless steel and application areas.

First of all, S38815 stainless steel has excellent corrosion resistance. It can resist the corrosion of a variety of media, including acids, alkalis, chloride ions, and so on. This corrosion resistance makes it widely used in the chemical industry, marine engineering, oil extraction, and other fields. Whether in harsh environmental conditions or in high-temperature and high-pressure working environments, S38815 stainless steel can maintain its stable performance.

Secondly, S38815 stainless steel has excellent oxidation resistance. It can resist high-temperature oxidation and maintain a low rate of steel corrosion. This property makes S38815 stainless steel very useful in working environments at high temperatures. It is widely used in heat exchangers, furnaces, burners, and other fields, and can ensure the long-term reliable operation of equipment.

In addition, S38815 stainless steel has good strength and toughness. It is able to withstand high loads and impacts and maintain a low deformation rate. This makes S38815 stainless steel widely used in the manufacturing field. It is commonly used to make a variety of parts and structural assemblies, such as in aerospace, automotive, and machinery, and is able to meet the requirements of complex working environments.

In addition, S38815 stainless steel has wear resistance and heat resistance properties. It is able to maintain good mechanical properties at high temperatures and is less susceptible to heat and wear. This makes S38815 stainless steel widely used in metallurgy, coal mining, and the chemical industry. For example, in coal mining, S38815 stainless steel can withstand high temperatures and abrasive environments to ensure the reliability and life of the equipment.

To summarize, S38815 stainless steel is a unique high-alloy stainless steel with excellent corrosion resistance, oxidation resistance, strength, and toughness. It is widely used in the chemical industry, marine engineering, oil extraction, aerospace, metallurgy, coal mining, and chemical industry. With the advancement of technology, the application areas of S38815 stainless steel will continue to expand, bringing more innovation and possibilities to various industries.

Stainless steel round tube is a kind of stainless steel material hollow round pipe, widely studied and applied in building decoration design decoration, the metal processing technology industry. For general use of stainless steel material round tube, the main technical parameters are stainless steel round tube material, stainless steel round tube diameter, stainless steel round tube length, stainless steel tube wall thickness, and so on.

Stainless steel tubes can be divided into round tubes and profiled tubes according to the shape of the section. The shaped tube has a rectangular tube, rhombic tube, oval tube, hexagonal tube, octagonal tube, and various asymmetric tubes with different cross sections. The shaped tube is widely researched and applied to various structural components, tools, and mechanical design parts in enterprises. Compared with the round tube structure, the shaped tube has a greater impact on the moment of inertia and the effective modulus of the cross-section, with the advantages of bending resistance and torsion resistance.

What are the classifications of stainless steel round tubes？
Stainless steel round tubes according to use can be divided into decorative stainless steel round tubes, industrial stainless steel round tubes, sanitary stainless steel round tube

Stainless steel material round tubes according to the production technology process can be divided into seamless tubes and welded tubes. Seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, and extruded pipe, etc., cold-drawn, and cold-rolled is the secondary processing of steel pipe; welded pipe is divided into straight seam welded pipe and spiral welded pipe.

Stainless steel material round tubes according to different materials can be divided into 201 stainless steel or round tubes, 304 stainless steel using round tubes, 316L stainless steel round tubes, and so on.

A stainless steel round tube is how to process out？
Stainless steel welded pipe production process: raw materials – slitting – welded tube – heat treatment – straightening – straightening – end repair – pickling – water pressure test – inspection (spray printing) – packaging – shipping

Cold-drawn (rolled) seamless steel pipe: round billet→heating→piercing→heading→annealing→acid washing→oil coating (copper plating)→multiple cold-drawn (cold-rolled)→billet→heat treatment→straightening→hydraulic test (flaw detection)→marking→warehousing.
Hot rolled (extruded seamless steel pipe): round billet → heating → piercing → three-roll inclined rolling, continuous rolling or extrusion → stripping → sizing (or reduction) → cooling → billet pipe → straightening → hydrostatic test (or flaw detection) → marking → storage.

What are the characteristics of stainless steel round pipes?
From the above process design flow, it is not difficult to see: First, the enterprise products for continuous online production, the thicker the wall thickness, the greater the unit and dissolution equipment and investment risk, the lower the economy and practicality. Thinner wall thickness, its input work output ratio will carry out the corresponding ability to decline; Secondly, the product of the process research to determine its advantages and disadvantages, generally using welded steel pipe with high precision, wall thickness uniformity, to stainless steel tube inside surface brightness (steel plate material surface brightness control level development decision) and any one length. Therefore, it shows its economy and aesthetics in carrying out high precision as well as low-pressure working fluid applications.

From the above processing can be clearly seen in a process: first, the wall thickness of the product, the more economical development of practical, thinner wall thickness, processing business costs will increase substantially; second, the product process research determines its limitations, general low precision seamless steel tube: uneven thickness distribution, bright tube long low-cost high appearance, and the internal and external pitting of the surface and the black spot is not easy to remove; Plastic As the third inspection, must have offline data processing. Therefore, high pressure, high strength, mechanical structure, and so on show superiority.

Stainless steel round tubes have their own different uses
Stainless steel tube is a practical and economical steel and is an important influence on the steel industry products. Widely used in social life for decoration and industry, many Chinese in the market enterprise production of stair handrails, windows, railings, furniture, and so on. Common 201 and 304 are two different materials. Stainless steel pipe is a kind of hollow cylindrical bar with many enterprises used to carry out decoration or piping systems to transport working fluids, such as stainless steel in buildings as well as handrails and pipelines conveying oil, gas, water, air, steam, is the application of stainless steel as a decorative pipe. In addition, under the same bending and plasticity conditions, light weight is one of its advantages, so it is widely used in the manufacture of mechanical parts and engineering structures.

Hastelloy is a nickel-based alloy, which is a difficult material to machine. The lkalloy company suggests the use of integral tools to enhance the rigidity of the tools. If the tool is made of carbide, it is inefficient. Efficiency can be improved if tempered tools with better toughness are used. For finishing, nickel or cobalt-based high-temperature alloys can be used with CBN tools. The alloys are widely used in the chemical and petrochemical industries, e.g. for chlorine-containing organic components and catalytic systems. The material is particularly suitable for high-temperature inert inorganic and organic acids (e.g. formic and acetic acid) mixed with impurities in seawater corrosive environments.

What is the difference between Hastelloy and stainless steel?

In fact, there is a clear difference between the two, Hastelloy, nickel-based alloys are usually understood as nickel-based alloys, that is, nickel has a high percentage, usually greater than 50.%, such as Monel, Hastelloy B, C series, etc., and the stainless steel is basically “steel”, so the proportion of iron is higher. For example, 304L is a stainless steel that contains more than 70% iron, although 9% nickel.

Nickel-based alloys are alloys that have high strength and a certain degree of oxidation and corrosion resistance at 650-1000°C. They are categorized into nickel-based alloys according to their main properties. According to the main properties, it is divided into nickel-based heat-resistant alloys, nickel-based corrosion-resistant alloys, nickel-based wear-resistant alloys, nickel-based precision alloys, and nickel-based shape memory alloys. Based on the matrix, superalloys are categorized into iron-based superalloys, nickel-based superalloys, and cobalt-based superalloys. Among them, nickel-based superalloys are called nickel-based alloys.

The above is the introduction of the difference between hastelloy and stainless steel, I hope it will help you. If you want to know more about Hastelloy, high-temperature alloys, stainless steel, and other materials information, welcome to continue to close lkalloy website.

As we all know, in the aerospace industry the precision machining for the material requirements is very high, of course, one side is in order to meet the special characteristics of aviation equipment, and more importantly, because of the aerospace environment impact. Because of the special environmental impact, the general materials on the market of course can not meet the needs of the environment, and are bound to need some special materials to replace them. Today to introduce you to a more commonly used material, that is, titanium alloy materials, especially in aerospace, which is more common, why is this material used more? Why is this material used more? It has something to do with its characteristics.

Titanium alloy, its specific gravity is small, determines the quality of small, high strength and thermal strength, determines the hardness and high-temperature resistance, and resistance to seawater and acid and alkali corrosion and a series of excellent physical and mechanical properties, determines that no matter what kind of environment can be used, there is also a point, the coefficient of deformation is very small, and therefore in the aerospace, aviation, shipbuilding, petroleum, chemical industry and other industries have been widely used.

Because titanium alloy materials have the above and ordinary materials are not the same place, but also decided that it is in precision machining is very difficult, many machining factories are not willing to process this material and do not know how to process this material. To this end, Xi’an Ruihua pump industry after a long period of understanding and communication with some titanium alloy processing customers, organized some small skills to share with you!

Due to the titanium alloy deformation coefficient being small, the cutting temperature is high, the tip of the tool stress is large, machining hardening is serious, resulting in cutting processing, the tool is easy to wear, chipping, cutting processing quality is difficult to ensure. How to do cutting processing then?

In titanium alloy cutting, cutting force is not big, work hardening is not serious, easy to get a better surface finish, but titanium alloy thermal conductivity is small, cutting temperature is high, tool wear is bigger, tool durability is low, the tool should be used with titanium chemical affinity role is small, high thermal conductivity, high strength, grain size of small tungsten and cobalt class carbide tools, such as YG8, YG3 and other tools. In titanium alloy in the turning process, chip breakage is a difficult problem in processing, especially the processing of pure titanium, In order to achieve the purpose of chip breakage, the cutting part can be sharpened into a full arc of the roll chip groove, shallow before and after the depth, before and after the narrow wide, so that the chips are easy to discharge outward, so as not to let the chips entangled in the surface of the workpiece, resulting in scratches on the surface of the workpiece.

The titanium alloy cutting deformation coefficient is small, the knife and chip contact area is small, cutting temperature is high, In order to reduce the generation of cutting heat, ① the front angle of the turning tool should not be too large, the front angle of the carbide turning tool is generally taken as 5-8 degrees, due to the high hardness of titanium alloy, in order to increase the impact strength of the turning tool, the back angle of the turning tool should not be too large, generally taken as 5 °, in order to strengthen the tip of the tip of the tool part of the strength of the tool, to improve the heat dissipation conditions, and to improve the tool’s In order to strengthen the strength of the tip part, improve the heat dissipation conditions, and improve the tool’s impact resistance, a larger absolute value of the negative edge inclination angle is used.

Control of reasonable cutting speed, should not be too fast, and the use of titanium alloy special cutting fluid cooling in the process, can effectively improve the tool durability, and choose reasonable feed.

Drilling is also more commonly used, titanium alloy drilling is more difficult, often in the process of burning and broken drill phenomenon. The main reasons are poor drill sharpening, untimely chip removal, poor cooling, and poor rigidity of the processing system. Depending on the diameter of the drill bit, grind a narrow horizontal edge with a width of 0.5㎜ in order to reduce the axial force and the vibration caused by resistance. At the same time, at a distance of 5-8㎜ from the tip of the drill bit, the edge band of the drill bit should be ground narrowly, leaving 0.5㎜ or so, which is favorable for the drill bit in chip removal. The geometry must be sharpened correctly, and the two cutting edges must be kept symmetrical, so as to prevent the drill bit from cutting on one side only, and the cutting force is all concentrated on one side, which will cause the drill bit to wear out prematurely, and even cause chipping phenomenon due to slipping. Always keep the cutting edge sharp. When the cutting edge becomes blunt, stop drilling immediately and resharpen the bit. If you continue to cut forcibly with a dull bit, the bit will soon burn and anneal due to high friction temperatures, resulting in the scrapping of the bit. At the same time, the hardened layer of the workpiece will be thickened, which will increase the difficulty of re-drilling in the future and the number of times to repair and sharpen the drill bit. According to the drilling depth requirements, should try to shorten the length of the drill bit, increase the thickness of the drill core to increase the rigidity, to prevent the drilling of holes due to jitter caused by the collapse of the edge. It has been proved by practice that the length of φ15 drill bit is 150 longer than that of 195. So the selection of length is also very important.

After the above two commonly used processing to see, titanium alloy processing is also relatively difficult, but after very good processing can still be processed out of good precision parts, titanium alloy parts for aerospace equipment.