304 316 321 Seamless Stainless Steel Round Pipe

Hot rolled seamless Stainless Steel pipes are usually produced on automatic tube rolling units. The solid tube billet is inspected and cleared of surface defects, cut into the required length, centered on the perforated end face of the tube billet, and then sent to the heating furnace for heating, and perforated on the perforating machine. In the perforation at the same time constantly rotating and advancing, under the action of the roll and the head, the blank tube gradually formed inside the cavity, called the capillary tube. It is then sent to the automatic pipe mill for further rolling. Finally, the wall thickness of the whole machine is adjusted, and the sizing machine is calibrated to meet the specification requirements. It is an advanced method to produce hot rolled Seamless Steel Pipe with continuous tube rolling unit.

301----- Good malleability for molding products. It can also be machined to harden rapidly. Good weldability. The wear resistance and fatigue strength is better than 304 stainless steel.

304----- is 18/8 stainless steel. The GB brand is 0Cr18Ni9. 309 -- has better temperature resistance than 304.

316----- The second most widely used steel after 304, mainly used in the food industry, pharmaceutical industry and surgical equipment.

321 -- Similar in properties to 304 except that titanium is added to reduce the risk of corrosion in the material weld.

410 -- martensite (high strength chromium steel), good wear resistance, poor corrosion resistance.

420 -- "tool grade" martensitic steel, similar to Brinell high chromium steel this earliest stainless steel. Also used in surgical knives, can be made very bright.

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