Stainless Steel Pipe Stainless Steel Needle Tube 309S SS304 316 Medical Stainless Steel Needle Tube Stainless Steel Needle Tube work tirelessly in the medical field, responsible for delivering medicines and vaccinations, taking blood samples, etc. In conclusion, stainless steel makes hypodermic needles a life saver. The Stainless Steel Needle Tube of a hypodermic syringe is a simple device—a thin, hollow metal needle attached to a plastic tube—but it is an essential part of today's medical tools. The Stainless Steel Needle Tube itself, called a "cannula," must be strong, sharp, and sterile, so which stainless steel can handle it? The answer is that 304 stainless steel and 316L stainless steel have the advantages of strong hardness, toughness, elasticity and not easy to rust, which are the most ideal medical needle materials. First, the machinability of 304 stainless steel and 316L stainless steel allo…