Alloy steel pipes

Alloy steel pipes are tubular with higher percentages, than standard carbon steel pipes, of alloying elements as Molybdenum (Mo), Chromium (Cr), Nickel, etc.

Alloy steel pipe is a kind of seamless steel pipe, its performance is much higher than the general seamless steel pipe, because this steel pipe inside containing Cr, high temperature resistance, low temperature, corrosion-resistant performance of other non-pipe joints not match, so the more extensive use of alloy tube in the petroleum, aerospace, chemical, electric power, boiler, military, and other industries.

The alloy steel pipe adopts high quality carbon steel, alloy structural steel and stainless & heat resisting steel as raw material through hot rolling or cold drawn to be made.

ASTM A335 Chrome Moly Pipe

ASTM A335 Pipe (ASME S/A335, Chorme-Moly) is a seamless ferritic Alloy-Steel Pipe for high temperature service.

ASTM A213 Alloy Tubes

ASTM A213 covers seamless ferritic and austenitic steel boiler,Boiler Tube, and heat-exchanger tubes for high temperature services, designated Grades T5, TP304, etc.

Nickel-Based Alloys Nickel-Based Alloys

Nickel-Based Alloys

Alloy Vs. Non-Alloy Steel

Steel is generally referred to as "carbon" steel, because it is a combination of iron atoms interspersed with carbon atoms.

The overall structure of steel is a crystalline lattice comprising both elements, which provides steel with a combination of strength and ductility. Adding other alloys such as chromium and aluminum gives steel more properties such as protection against rust and lighter weight and durability.

Steel Manufacturing

Plain, or "carbon," steel is an alloy metal of iron and carbon. In order to produce steel, iron must first be smelted from ore in a furnace. Impurities that were present in the iron ore must be extracted. The iron that results generally still contains a carbon content which is too high for workable steel. The metal must be smelted further to reduce the carbon content to between 0.2 to 1.5 percent. Depending on how the steel will be used, the metal is subjected to additional tempering.

Steel Structure

Carbon steel strength is due to its crystalline structure. Groups of iron and carbon atoms are arranged in a lattice, with the carbon atoms preventing the iron atoms from slipping over each other, in effect making the steel rigid. The addition of an alloy such as titanium or manganese strengthens this structure by adding different atomic sizes to the lattice. This reinforces steel's rigidity by further impeding molecular movement when the metal is it is subjected to stresses.

Steel Alloys

Steel alloys are made by combining elements during the smelting process when the iron is still molten. Other metals such as chromium, aluminum or titanium are added at this stage. Alloys have properties which make them more durable than simple carbon steel. This is due to the structural properties of how iron, carbon and other elements interact. Other metals are added to give carbon steel specific enhancements, such as extra strength, high temperature tolerance, or more malleability.

Comparisons

Plain carbon steel has a wide variety of applications, but must be tempered at specific heat conditions to give the steel a combination of ductility and durability. Alloying steel has advantages, such as protection against corrosion when steel is mixed with chromium. Other elements such as titanium, nickel and boron further harden steel. Weldability can be increased by adding sulfur or lead, whereas carbon steel by itself is more sensitive to cracking when being welded.

Galvanized Steel

"Galvanized" steel is produced by immersion in a tank of molten zinc. Zinc atoms diffuse into the top layers of the steel, forming a protective layer against corrosion. Galvanizing can be performed on various steel alloys as an additional protection against rust. Galvanized steel is a cheaper method of rust-proofing steel than alloying it with chromium.

Nickel-Based Alloys

Super stainless steels such as duplex steel, super austenitic steel, tantalum-titanium-zirconium, nickel-based alloys, and other high-performance alloys are available in our current stock. We also provide processing services for conventional and non-standard/welded pipes, rectangular pipes, evaporation crystallization, MVR evaporation equipment, pressure pipelines in the maritime industry, and more.

Seamless tube processing

With years of expertise, we provide a diverse array of steel tube processing options. From sawing and machining tube blanks to intricate bending and upsetting operations, we actively assist you throughout your projects.

Our capabilities extend to eccentricity reduction and concentricity enhancement through turning and grinding. We excel in creating complex geometries using processes like rotary swaging and axial forming. Additionally, we offer property modifications via partial heat treatment, ensuring tailored solutions for your specific needs.

Variable wall thicknesses

Variable wall thicknesses

Drilling / stamping / lasering

Drilling / stamping / lasering

Peeling / roller burnishing

Peeling / roller burnishing

Cold forming

Cold forming

Cutting

Cutting

Beveling

Beveling

Deburring

Deburring

Thread rolling / threading

Thread rolling / threading

Partial hardening

Partial hardening

Turning / milling / grinding

Turning / milling / grinding

Reducing / expanding

Reducing / expanding

Machining

Machining

ASTM A213 T12 Seamless Alloy Pipes

ASTM A213 T12

ASTM A213 T91 Tubes

ASTM A213 T91

ASTM A213 T5b Seamless Alloy Tube

ASTM A213 T5b

ASTM A335 P91 Pipe

ASTM A335 P91

ASTM A335 P9 Pipe

ASTM A335 P9

ASTM A335 P22 Pipe

ASTM A335 P22

ASTM A335 P11 Alloy Steel Pipe

ASTM A335 P11

ASTM A333 Grade 6 Pipe

ASTM A333 Grade 6

ASTM A333 Gr. 8 Low Temperature Steel Pipe

ASTM A333 Gr. 8

EN 10216-2 Seamless Steel Tubes

EN 10216-2

ASTM A519 carbon and alloy steel mechanical tubing

ASTM A519

EN 10216-1 non alloy steel tubes

EN 10216-1

ASTM A210 seamless medium carbon steel boiler and superheater tubes

ASTM A210

Alloy steel U tubes

Alloy U tubes

JIS G3458 Alloy Steel Pipes

JIS G3458

12Cr1MoVG alloy steel seamless steel pipe

GB 12Cr1MoVG

15CrMoG alloy pipe

GB 15CrMoG

WB36 alloy pipe

WB36

WB36 alloy pipe

GB5310 20G

application

Application

Alloy steel pipes are ideally suitable for chemical, petrochemicals, and other energy-related applications.

The alloy steel pipe adopts high quality carbon steel, alloy structural steel and stainless & heat resisting steel as raw material through hot rolling or cold drawn to be made.

Alloy steel can be used in process area where carbon steel has limitation such as

As an important element of steel products, alloy steel pipe can be divided into seamless steel pipe and welded steel pipe according to the manufacturing technique and tube billet shape.

Here you can see the common alloy steel grade that you will come across.

Why the application of alloy steel pipe is wider than others

There are many kinds of materials used for transport in industrial production. Specifically we will have more choices and it is not limited to the use of alloy steel pipe. But even in the face of more choices, many people tend to choose alloy steel pipe. People make their own choices will have their own reasons. This means the alloy steel pipe application has its own advantages. Compared with transmission lines made of other materials, after it meets the basic application requirements, its quantity is lighter. Then in the practical application of alloy steel pipe, it will have more advantages because of this. Besides its physical characteristic advantage, it also has economic advantages. The wide application of alloy steel pipe is with kinds of reasons. So in practical usage, we can exploit the advantages to the full, in this way can we get more profits in these applications of alloy steel pipe.

What requirements should alloy steel pipe application meet

The transportation of kinds of gases or liquids in production needs to rely on alloy steel pipe. This shows that the actual role of alloy steel pipe application is important. High temperature resistant and low temperature resistant is the tolerance of temperature. In the practical application of alloy steel pipe, there will be many materials need to be transported. However their temperatures are not the same. So this can be the basic requirement to alloy steel pipe. It needs more corrosion resistance. Corrosion resistant material is the best material during transporting, because it is corrosion resistant. So it can be used in more occasions. And it is definitely very convenient for users.

The biggest advantages of alloy steel pipe

Can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion of the field of application of high-pressure alloy pipe. Of alloy steel pipe total consumption accounted steel in the proportion is only half of the developed countries, to expand the field of use of the alloy steel pipe to provide a wider space for the development of the industry. The future needs of the average annual growth of China’s high-pressure alloy steel pipe long products up to 10-12%.

Specification, standard and identification of alloy steel pipes

Alloy Steel pipe contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous.

Industries We Serve

Our team of experienced sales specialists proudly partners with gas and chemical processors, power generation plants, oil refineries, and related industries to offer piping components and value-added services.

The biggest advantages of alloy steel pipe can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion of the field of application of high-pressure alloy pipe. Of alloy tube total consumption accounted steel in the proportion is only half of the developed countries, to expand the field of use of the alloy tube to provide a wider space for the development of the industry. According to the Chinese Special Steel Association alloy pipe Branch Expert Group, the future needs of the average annual growth of China’s high-pressure alloy pipe long products up to 10-12%.

Q&A

Our team of experienced sales specialists proudly partners with gas and chemical processors, power generation plants, oil refineries, and related industries to offer piping components and value-added services.

The most important and desired changes in alloy steel are

Alloy steels are made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions (or combinations) making the material take on different aspects such as increased hardness, increased corrosion resistance, increased strength, improved formability (ductility); the weldability can also change.

Alloying Elements & Their Effects

Pipes, Tubes and Hollow Sections

Norms

Grade

Alloying Elements

Commonly used alloying elements and their effects are listed in the table given below.

Alloying Elements Effect on the Properties
Chromium Increases Resistance to corrosion   and oxidation. Increases hardenability and wear resistance. Increases high   temperature strength.
Nickel Increases hardenability. Improves   toughness. Increases impact strength at low temperatures.
Molybdenum Increases hardenability, high   temperature hardness, and wear resistance. Enhances the effects of other   alloying elements. Eliminate temper brittleness in steels. Increases high   temperature strength.
Manganese Increases hardenability. Combines   with sulfur to reduce its adverse effects.
Vanadium Increases hardenability, high   temperature hardness, and wear resistance. Improves fatigue resistance.
Titanium Strongest carbide former. Added to   stainless steel to prevent precipitation of chromium carbide.
Silicon Removes oxygen in steel making.   Improves toughness. Increases hardness ability
Boron Increases hardenability. Produces   fine grain size.
Aluminum Forms nitride in nitriding steels.   Produces fine grain size in casting. Removes oxygen in steel melting.
Cobalt Increases heat and wear   resistance.
Tungsten Increases hardness at elevated   temperatures. Refines grain size.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes
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