Payment & Shipping Terms:
|Type::||Special Steel Pipe||Material::||SAE1010 , SAE1020 , SAE1035 , SAE1045 , ST37.0 , ST44 , ST52 , E235 , E355|
|Section Shape::||Omega||Alloy Or Not::||Non Alloy|
|Surface Treatment::||According To Customer's Requirement|
Material 20# Special shape Seamless Carbon Steel Tube Omega Pipe For Boiler
Special Steels Seamless Omega Tube, it is made by Carbon and Alloy Steel, produced by extrusion and cold drawn, the Omega Tubes are used in Boilers and Super Heaters etc, for better heating efficiency.
|Material:||SAE1010 , SAE1020 , SAE1035 , SAE1045 , ST37.0 , ST44 , ST52 , E235 , E355|
|Grade:||BS, JIS, GB, DIN, ASTM, API,|
|Length:||up to 12m, or according to customer's requirement.|
|Outer diameter:||Round: 5-420mm|
|Diameter and wall thickness could be at customer's request.|
|Technology:||Cold Draw/Cold Rolled|
|Surface treatment:||painted,galvanized,or oiled according to customer's requirement|
|Place of origin:||China|
|Application||Mechanical structure, Carbon pressure machinery etc.|
|Shipping & Payment:|
|Packaging:||In bundles; or according to customer's requirements|
|Terms of Delivery :||FOB Shanghai|
|Terms of Parment :||T/T, 30% advance payment, balance paid against B/L copy|
|Delivery time:||Within 25-40 days since advance payment is receied
|Material and Standard|
|Item||Chinese Standard||American Standard||German Standard|
Seamless Cold Worked Tubing
The seamless cold worked tubing available at our factory is custom manufactured, created from raw form solid bar and pierced to convert to mother hollow. Our on-site normalizing process produces suitable tubing for cold working, and after a sulfuric acid cleaning, cold rinsing, and lubrication bath, the specified materials are drawn utilizing a mandrel draw bench with carbide die. The outside diameter, inside diameter, and wall thicknesses are reduced to the required dimensions with resulting high tensile properties, dimensional accuracy, micro structure uniformity and excellent surface quality. Tubing is available in a range of carbon and alloy grades including 1020, 1026, 1030, 4130, 4140 and 4150 among others.
Our experienced tube making process is adapted and modified to produce customer specified components for critical applications. Parts are stress relieved others are quench & tempered followed by rotary straightened for extremely straight tubes and tube ends are then cut to an exact 90° square. Parts are deburred and coated with a rust preventative treatment. Thorough testing methods are employed in process and post production to ensure the highest quality and accuracy levels, including eddy current testing, 100% dimensional tests, straightness, and cosmetic evaluations. For more details about our custom seamless cold worked tubing
1. BK (+C)
No heat treatment after last cold forming process.
2. BKW (+LC)
After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR)
After the final cold forming process the tubes are stress relieve annealed.
4. GBK (+A)
After the final cold forming process the tubes are annealed in a controlled atmosphere.
5. NBK (+N)
After the final cold forming process the tubes are annealed above the upper transformation
point in a controlled atmosphere.
Stress Relief process
Quenching and tempering to HRC30-HRC45