types of stainless steel seamless pipes

Types of Stainless Steel Seamless Pipes: Beginner’s Guide

Stainless steel seamless pipes are the most common type of stainless steel pipe used for industrial applications.

Developed countries like the USA, Japan, EU implement stainless steel seamless pipes almost everywhere in the construction.

China is one of the leading production countries of type 304 stainless steel seamless pipes since 2017.

The international stainless steel seamless pipe industry has developed into a large and systemized structure, with rapid growth trend and good market performance in recent years.

Austenitic Stainless Steel Seamless Pipes

Austenitic stainless steel seamless pipes are the most popular and widely used pipes in the world.

Austenitic stainless steel pipes, which means they contain 16-26% chromium and 6-22% nickel material in their composition.

The addition of these chemical elements makes the steel non-magnetic and gives it the ability to be bent, drawn, or formed.

Stainless steel is an economical choice of material when compared to some carbon steels, copper, brass and aluminum alloy. It is especially important in the food processing industry where it is often used for a wide variety of equipment such as mixers, tanks, conveyors and more.

Austenitic stainless steels are classified in the 300 series, with 18% to 30% chromium and 8% to 20% nickel for enhanced surface quality, formability, increased corrosion and wear resistance.

Austenitic stainless steel seamless pipes are non-hardenable by heat treatment. The most familiar stainless steel is probably grade 304, sometimes called TP304 or simply 304. Grade 304 surgical stainless steel is austenitic steel containing 18-20% chromium and 8-10% nickel.

Ferritic Stainless Steel Seamless Pipes

Ferritic stainless steel seamless pipes are based on the crystal structure of iron combined with a small percentage of chromium.

This group of steel seamless pipe is defined as ferritic because they have a body-centred cubic crystal structure, which provides them with magnetic properties. Ferritic stainless steel seamless pipes grades have good ductility and can be cold worked, but are not heat treated.

UNS S41000 is a common ferritic stainless steel grade. It has a good balance of strength and ductility. The higher nickel content in the alloy enables it to exhibit better corrosion resistance compared to other ferritic steels. It is susceptible to stress corrosion cracking and has low hardenability.

The alloy is used in a variety of applications such as automotive exhaust systems, kitchen equipment, medical appliances and industrial piping components.

The material can be exposed to temperatures up to 870°C (1600°F). However, like most ferritic grades, it undergoes intergranular corrosion after exposure above 800°C (1475°F). This makes the material unsuitable for high temperature applications where a lot of time is spent at or above the annealing temperature.

Compared to austenitic stainless steel seamless pipes (for example 304L stainless steel seamless pipes), the material does not have high creep strength and is susceptible to sensitization during welding.

Martensitic Stainless Steel Seamless Pipes

Martensitic stainless steel seamless pipes high hardness and low toughness makes it brittle.

It has a relatively low corrosion resistance which can be improved with the addition of other elements such as nickel. Martensitic stainless steel is found in jet engines, steam turbines, spacecrafts, machine tools and nuclear reactors.

Martensitic stainless steel is a specific type of stainless steel alloy that has only a small amount of nickel, but high levels of carbon. Martensitic stainless steel can be heat treated to make it extremely hard, and it’s ideal for applications where strength, hardness and wear resistance are essential.

Martensitic stainless steel seamless pipes produced by HZW are widely used in petroleum, chemical industry, coal chemical industry, power plant desulfurization and other industries. Our martensitic stainless steel tubes have been exported to North America, Middle East, Southeast Asia and other regions.

Duplex and Super Duplex Stainless Steel Seamless Pipes

Duplex and super duplex stainless steel seamless pipes are the combination of ferritic and austenitic steels and can be hardened only by cold working. The most frequently used seamless pipes are grades 904L and 2205 which contain higher chromium, nickel and other alloying elements such as nitrogen or copper to enhance its structure or performance.

Duplex and super duplex stainless steel seamless pipes are available in various dimensions, sizes and thicknesses. These are extensively used in applications that require high strength.

These grades feature high corrosion resistance, excellent mechanical strength and good weldability.

Duplex and super duplex stainless steel seamless pipes are used as a standard material in heat transfer process equipment such as heat exchangers, condensers, boilers and other similar applications that require piping systems.

In addition, these seamless pipes find their application in high pressure applications such as oil and gas exploration & processing equipment like heat exchangers, condensers and pipelines.

Why Not Choose The Best Manufacturer Of Stainless Steel Seamless Pipes From China

In the pipe industry, it is well known that China is a world-class manufacturer of stainless steel seamless pipes and tubes.

Stainless steel pipe suppliers are also known to be a major supplier of quality goods.

The reason why China has become a top manufacturer of this type of pipe is because of its good reputation for producing high quality goods that can withstand the test of time. It is also well known for making products that are very durable and long lasting. They also provide great customer support services and excellent customer service.

In recent market, there are many manufacturers who manufacture stainless steel seamless pipes and tubes but not all manufacturers can provide you with the same quality products. You should be careful when choosing your supplier because you don’t want to get ripped off by some unscrupulous company that sells low quality products at a very high price.

Here at HZW, you are not only enjoy our high quality seamless pipes but also our full service.

No matter the pipes and tubes or pipe spool, tube sheet and other relastion piping products, HZW is your pipe expert to help you design the tubing solution.

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