![]() ![]() Through cold drawing tube in the AW and AWA conditions, fine dimensional tolerances are achieved, with excellent uniformity of wall thickness and concentricity, grain structure and hardness. The purpose of cold drawing is to reduce the OD or wall or both, to produce a smooth surface finish and to break up the weld structure, which results in recrystallisation when annealed. The tube is produced by drawing through a hardened steel or tungsten carbide die, at room temperature. This tube is typically destined for heat exchanger applications and is produced in a similar way to AWA product except that the internal bead is rolled flush with the inside tube surface prior to annealing.Ĭold drawn welded (CDW) and cold drawn welded annealed (CDWA) tube Bright annealing is carried out in a controlled-atmosphere furnace, so that no oxide or scale is formed on the surface.Īnnealing both increases the corrosion resistance and softens the tube which allows severe manipulation such as bending, expanding and forming. This tube is produced by the same process as AW tube but is annealed to relieve stresses and improve ductility. This assists with ‘clean in place’ (CIP) environment food and beverage process lines or other applications such as the pharmaceutical industry. ![]() The result is an improved internal finish along the weld, reducing the chance of a crevice where liquid or food product may be trapped. This tube at the point of manufacture goes through a process where the internal weld bead is rolled. It is not suitable for applications requiring significant flaring, expanding or bending. AW tube has a higher yield point than annealed tube and is generally used for decorative applications or in mildly corrosive conditions. This tubing is produced direct off the continuous tube welding mill, using cold rolled stainless steel strip made to ASTM standards, with tube produced to commercial limits of straightness in standard or specific customer lengths. The tubular products system incorporates a comprehensive range of stainless steel fittings in the form of elbows, tees, reducers and flanges in various sizes, wall thickness, grades and finishes to suit tube dimensions and tolerances. Tube is usually annealed if extensive forming and bending is required, such as for bending or expanding. Stainless steel tube can be joined by welding, which facilitates rigidity in construction, or using mechanical fittings which enables dismantling for hygienic cleaning. ![]() Finishes are selected to suit application and aesthetic appeal. Unpolished has a 2B mill finish, standard polished is a finely grit polished finish and there is a finer buffed finish giving close to mirror appearance. It is usually manufactured by the processes of longitudinal welding, hot and cold drawing (seamless) or spiral welding.įinishes or appearance range from unpolished to highly polished. Tube is manufactured in round, square and rectangular sections in a variety of wall thicknesses. It is resistant to many forms of corrosion, has hygienic sterile properties, high quality aesthetic appeal and exceptional strength. Stainless steel tube is typically specified as OD (outside diameter) and WT (wall thickness) and mechanical properties of the base stainless steel material. Please contact your nearest Atlas Steels Service Centre if non-standard product is required and we will enquire about its availability through our global supply network of mills and stockists.Ītlas Steels locations and contacts can be found in main menu of this website. The information provided is for standard stock product and does not encapsulate all available combinations. Aluminium Sheet, Plate and Treadplate Product Specifications.Carbon Steel Tube, Pipe and Fittings Product Specification. ![]() Carbon Steel Heat Exchanger, Hydraulic and Pneumatic Tube.Stainless Steel, Tube, Pipe and Fittings Product Specifications.Stainless Steel Pipe, Fittings and Flanges.Stainless Steel Tube, Pipe and Fittings.Stainless Steel Sheet, Coil, Strip and Plate Product Specifications.Stainless Steel Sheet, Coil, Strip and Plate.Stainless and Engineering Steel Bar and Wire Product Specifications.Stainless and Engineering Steel Bar and Wire. ![]()
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