What is the difference between stainless steel pipes with seams and seamless pipes?
The difference between seamed pipe and seamless pipe:
Concentricity: Seamless tubing is made by punching a hole in a stainless steel billet at 2200°F. At this high temperature, the tool steel is stamped and drawn to soften and helically form from the hole come out. Such pipes have uneven wall thickness and high eccentricity. Therefore, ASTM allows a greater difference in wall thickness for seamless pipes than for seamed pipes. Seamed pipe is made by precision cold rolling of sheet (4-5 feet wide per roll). These cold rolled sheets typically have a maximum wall thickness difference of 0
What are the applications of medical stainless steel pipe
We know that stainless steel pipes are widely used in many fields and also in our medical field. Currently, in order to prevent the spread of infectious diseases, hospitals and clinics must frequently clean and disinfect all parts and surfaces. Therefore, precision stainless steel pipe fittings are used in various medical furniture, such as tables, various trolleys, cabinets, infusion stands, beds, etc., as well as common parts such as sinks, shower heads, and bed pans on the bed.
Of course, the quality and grade requirements of the scope of use of medical stainless steel pi
What are the 5 major application fields of stainless steel pipes?
1. Architectural decoration field
The field of architectural decoration is the most common. Think about our own anti-theft windows and stair handrails. Most of the stair handrails in the past are made of wood. Now stainless steel pipes can also be used instead. For example, anti-theft windows used to be made of iron. Now it can also be replaced by stainless steel, and there are also stainless steel gates. I wonder if you have seen colored stainless steel gates. Stainless steel tubes can also be plated to make colored stainless steel tubes. There is really everything you want. What do yo
What are the applications and characteristics of stainless steel sanitary pipes?
Stainless steel sanitary pipes are mainly used in production equipment and assembly lines of beverages, alcohol, bioengineering, food, etc. People mainly ask for the surface finish, passivation layer and oil-free degree of stainless steel sanitary pipes:
1. Surface finish: The inner and outer surfaces of the stainless steel sanitary pipe are polished to make the surface of the steel pipe smoother and shiny, which is what we often call a mirror surface. The main purpose is to prevent the fluid material going in the tube from forming a wall in the tube, which wil
What are the application ranges of stainless steel precision tubes?
What are the application ranges of stainless steel precision tubes?
1. Stainless steel precision tubes for mechanical structures: printing and dyeing, printing, textile machinery, medical equipment, kitchen equipment, automobile and ship accessories, construction and decoration, etc.
2. Industrial stainless steel precision tubes: heat exchangers,
What is the overall pattern of international seamless stainless steel pipe production and sales?
At present, countries that can mass-produce seamless stainless steel pipes in the world include China, Germany, Italy, Russia, Ukraine, Brazil, Czech Republic, South Africa, Argentina, the United States and Japan. Among them, some developed countries such as the United States, Germany, and Japan have gradually given up the production of seamless stainless steel pipes, and the production capacity of seamless stainless steel pipes in these countries is gradually decreasing. The production capacity of seamless stainless steel pipes in some developing countries is increasing substantially, especia
What are the main uses of stainless steel capillary?
The main application of stainless steel capillary:
As a raw material, stainless steel capillary is widely used in chemical industry, petroleum, electronics, jewelry, medical treatment, aerospace, air conditioning, medical equipment, kitchen utensils, pharmaceuticals, water supply equipment, food machinery, power generation, boilers and other fields. Specific examples are as follows:
1. Medical equipment industry, injection needle tube, puncture needle tube, medical industrial tube.
2. Industrial electric heating tubes, industrial oil tubes.
3. Temper
What is Titanium Steel
The true face of titanium steel
At present, there are many jewelry called titanium steel in China. The material used is not titanium, but stainless steel. It is called titanium steel for attracting people, and some are even called titanium alloy jewelry, which is actually stainless steel jewelry without titanium.
Among them, the most common material for stainless steel jewelry called titanium steel is 316L stainless steel, and some manufacturers call it 316L international standard titanium. In fact, 316L is a stainless steel number, which is obtained by continuing to reduce the
Corrosion resistance and uses of 430
430 has strong corrosion resistance in oxidizing environment, but weak corrosion resistance in non-oxidizing acid and activating solution, and can only be used as a corrosion-resistant material for equipment used in the manufacture of acetic acid.
Intergranular corrosion resistance, ferritic steel grades C and N have lower solubility than austenite, and because Cr, C, etc. diffuse quickly in ferrite, carbides are easily formed, so they show intergranular corrosion characteristics and austenite. Stainless steel is different. The sensitization temperature range of 1Cr17 steel is around 40
Do you know the reason why the 316L stainless steel pipe is magnetic?
There are many kinds of stainless steel pipes, which are mainly divided into two categories according to the structure: austenitic type and martensite or ferrite type. The austenitic type is non-magnetic or weakly magnetic, and the ferrite or martensite is magnetic. So due to the current popularity of 316L stainless steel pipes, many customers who have just started purchasing stainless steel pipes have doubts about how to choose and identify 316L stainless steel pipes. Let`s first understand why 316L stainless steel pipes are magnetic.
The 316L stainless steel decorative tube b
Do you know the hardness test of 316L stainless steel pipe?
316L stainless steel pipe hardness test is the most commonly used Rockwell hardness of stainless steel pipe. Especially in the hardness test of heat-treated parts, the Rockwell hardness test is generally stopped. The Rockwell hardness test method for stainless steel is widely used because of its simplicity. Whether the Brinell hardness is Vickers hardness, its experimental method takes the diameter and the length of the indentation with the diagonal measurement of the head, which is very troublesome. And the Rockwell hardness test method, uses the same process as the pit of the indenter,
The role of nickel in stainless steel
The main role of nickel in stainless steel is that it changes the crystal structure of the steel. One of the main reasons for the addition of nickel to stainless steel is the formation of an austenitic crystal structure, which improves stainless steel properties such as ductility, weldability and toughness, so nickel is known as an austenite former.
The crystal structure of ordinary carbon steel is called ferrite, which is a body-centered cubic (BCC) structure, and nickel is added to promote the crystal structure to change from a body-centered cubic (BCC) structure to a face-cen
Basic knowledge of 303 stainless steel
303 stainless steel is austenitic free-cutting stainless and wear-resistant acid steel containing sulfur and selenium respectively, which is used for occasions requiring free cutting and high surface finish.
Name: 303 stainless steel
Standard: GB/T 1220
303 stainless steel is austenitic free-cutting stainless and wear-resistant acid steel. In order to improve the performance of the steel, no more than 0.60% molybdenum can be added to the steel to resist ablation.
Mechanical properties of 303 stainless steel After annealing and stress
What is 304 stainless steel What is the difference between 304 stainless steel and 302 stainless steel?
With the development of modern technology, people have higher and higher requirements for the quality of buildings. The quality of a building is mainly determined by its structure and the materials used. The structure is generally designed by professional designers, and the materials are more up to us. Stainless steel is the most widely used material in construction. There are many types and models. Among them, 304 stainless steel is welcomed by the majority of owners. Next, let's take a look at what is 304 stainless steel, and what is the difference between 304 stainless steel and 302 stainle
Common materials for welded pipes
Commonly used materials for welded pipes are: Q235A, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.
The billet used for welded steel pipe is steel plate or strip steel, which is divided into furnace welded pipe, electric welding (resistance welding) pipe and automatic arc because of different welding processes.
welded pipe
Welded pipe. Due to the different welding forms, it is divided into two types: straight seam welded pipe and spiral welded pipe. Because of its end shape, it is divided into
Surface processing of stainless steel-manufacturing methods and uses
The production of stainless steel has increased significantly in the past half century, and the establishment of a mass production system, leading to the realization of low prices is an important factor, and on the basis of this demand, the development of steel grades and the improvement of surface quality And processing also made a big contribution. Stainless steel maintains metallic luster even in the state of metal surface in normal usage environment. Therefore, kitchen machinery that requires a sense of cleanliness and building materials that require ornamental must be used after various s
The role of alloying elements in stainless steel composition
In general, pure metal has relatively high plasticity. When other alloying elements are added, it also has good plasticity when forming a single-phase solid solution. For example, iron-nickel alloy can form a continuous solid solution. Therefore, when iron and nickel are in any ratio, alloy plasticity is very high.
However, under the condition of containing other elements, an intermetallic compound that is insoluble in solid solution or partially soluble in solid solution is formed, which reduces the plasticity of the metal, so the plasticity of the alloy is worse than that of p
Types and definitions of stainless steel corrosion
Corrosion resistance of various stainless steels
304 is a general-purpose stainless steel that is widely used to make equipment and parts that require good overall properties (corrosion resistance and formability).
301 stainless steel exhibits obvious work hardening phenomenon during deformation, and is used in various occasions requiring higher strength.
302 stainless steel is essentially a variant of 304 stainless steel with higher carbon content, which can obtain higher strength by cold rolling.
302B is a kind of stainless steel with high silicon content, which h
The role of main elements in stainless steel
As a special steel product with added value, stainless steel is widely used in more and more fields, whether in civil fields such as decoration, kitchen utensils, household appliances, etc.; or in industrial fields such as petrochemicals, machinery and equipment, etc. At present, the market prospect of high-quality stainless steel products is still optimistic. Let's take a look at the functions of the main related elements required for the production of stainless steel:
Nickel: The most important core element of nickel-based stainless steel, which can improve the strength and to
How to deal with stainless steel rust spots?
Regarding stainless steel rust spots, we can start from both physical and chemical perspectives
1. Chemical method
Use pickling paste or spray to assist the re-passivation of the rusted part to form a chromium oxide film to restore the corrosion resistance. After pickling, in order to remove all contaminants and acid residues, it is very important to rinse properly with clean water. After all treatment, re-polish with polishing equipment, and seal with polishing wax. For local slight rust spots, you can also use a 1:1 mixture of gasoline and engine oil to wipe off the rust spots
Mysteel: The advantages of using stainless steel for Musk's super-heavy rocket
According to the "Los Angeles Times" report, at 9 a.m. local time on July 20, Blue Origin founder Jeff Bezos and his brother Mark Bezos and other four pilots boarded the "New Shepard" aircraft. , lifted off from the launch site in western Texas, USA, flew to the sub-orbit of the earth about 105 kilometers above the ground and successfully returned and landed smoothly.
As early as Monday, local time, Musk's company had already taken the lead in completing a recent aerospace experiment -- the first "static ignition" test of the world's largest rocket booster.
The Sp
Is 304 stainless steel food grade stainless steel?
Recently, the owner of a factory was criminally detained for producing low-quality thermos cups. The company's thermos cups were made of non-food-grade stainless steel (201 stainless steel) and sold at low prices to make ill-gotten gains.
Today we will talk about the food-grade stainless steel that is often heard in kitchen appliances and tableware.
First of all, non-food grade stainless steel: the precipitation of heavy metals is very harmful. If stainless steel products for "non-food contact" are used as cooking utensils and tableware, heavy metals are easy to p
