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.
Alloy steel is a series of alloy which its main content is steel. To add different metal elements with different ratios in steel can change the mechanical properties of alloy steel.
American Society for Testing and Materials(ASTM), American Society of Mechanical Engineers (ASME)
| Description | Standard | Dimension (mm) |
Steel code/ Steel grade |
|---|---|---|---|
| Carbon and alloy steel mechanical tubing, either hot-finished or cold-finished | ASTM A519 | 20-180 x 2-30 | A1, C |
| Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-exchanger Tubes | ASTM A213 09 | 10.3-426 x 1.0-36 | T5, T5b, T9 , T11, T22 ,T91 |
| Seamless Carbon and Alloy Steel for Mechanical Tubing | ASTM A333 | 1/4"-42" x SCH20-XXS | Grade1 Gr. 3,Gr..6, Gr.8 , Gr. 9 |
| Seamless ferritic alloy-steel pipe for high-temperature service | ASTM 335/335M | 1/4"-42" x SCH20-XXS | P5, P9 ,P11, P91, P22, P92 |
Germany Safety(GS), Deutsches Institut für Normung(DIN)
| Product name | Executive standard | Dimension (mm) | Steel code/ Steel grade |
|---|---|---|---|
| Seamless Steel Tubes for Elevated Temperature | DIN 17175 | 10-762 x 1.0-120 | St35.8,St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36 |
| Seamless steel tubes for pressure purposes | EN10216 | 4.0-60.0 x 0.5-8 5-7 m manufacturing lenght |
P235GH TC1, P235GH TC2, 16Mo3 |
| Seamless precision steel tube applications | EN 10305-1 | 13.5-165.1 x 1.8-4.85 | St33.2 |
| Seamless Precision Steel Tube | DIN 2391 | 4.0-60.0 x 0.5-8 | St35, St45, St52 |
Japanese Industrial Standards (JIS) specifies the standards used for industrial activities in Japan.
| Product name | Executive standard | Dimension (mm) | Steel code/ Steel grade |
| Carbon steel/Alloy steel boiler and heat exchanger tubes | JIS G3461,2 | 19.05-114.3 x 2.0-14 | G3461(STB340, STB410, STB510) G3462(STBA22, STBA23) |
| Heat resistant alloy steel pipes that are used for high temperature conveying fluid pipes for heaters and boiler tubes. | JIS G3458 | 10.5-660.4 mm | STPA 12, STPA 20, STPA 22, STPA 23, STPA 24, STPA 25, STPA 26 |
Honed Tubes are ready to use for hydraulic cylinder applications without further ID processing.
Boiler tubes are used in heat exchange appliances in which the energy is transferred from one medium to the other.
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. |
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.
Nearly all alloy steels require heat treatment in order to bring out their best properties.
Alloying Elements & Their Effects
Pipes, Tubes and Hollow Sections
Grade:
SunnySteel supplier alloy steel pipes & tubes as ASTM A213,A335 and A333 used for many different purposes.
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.
Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.
