Stainless Steel Pipe Products Description 鈻篠tainless steel tubing is used in a wide variety of applications due to its outstanding durability, corrosion resistance, and aesthetics. 904L stainless steel pipe is a stainless steel that is becoming more and more popular with manufacturers and consumers. 鈻篊hemical composition of 904L stainless steel pipe: Chromium (Cr): 19 - 23% Nickel (Ni): 23 - 28% Molybdenum (Mo): 4 - 5% Copper (Cu): 1 - 2% Carbon (C): 0.02% max Silicon (Si): 1.00% max Manganese (Mn): 2.00% max Phosphorus (P): 0.045% max Sulfur (S): 0.035% max 鈻?04L stainless steel pipe (00Cr20Ni25Mo4.5Cu) is an austenitic stainless steel with better corrosion resistance. Because of the addition of 1.5% copper, it also has excellent corrosion resistance for reducing acids such as sulfuric acid and phosphoric acid. In addition, It has low carbon characteristics for welding purposes. Processing performance 1. Welding performance Like general stainless steel, 904L can be welded by various welding methods. The most commonly used welding method is manual arc welding or inert gas shielded welding. The metal of the electrode or wire is based on the composition of the base metal and has higher purity, and the content of molybdenum is required to be higher than that of the base metal. Preheating is generally not required before welding, but in cold outdoor operations, in order to avoid condensation of water vapor, the joints or adjacent areas can be evenly heated. Note that the local temperature should not exceed 100掳C, so as not to cause carbon accumulation and intergranular corrosion. When welding, it is advisable to use small heat input, continuous and fast welding speed. Generally, heat treatment is not required after welding. If heat treatment is required, it must be heated to 1100-1150掳C and then cooled rapidly. Supporting welding consumables: welding rod (E385-16/17), welding wire (ER385). 2. Machinability The machining characteristics of 904L are similar to other austenitic stainless steels, and there is a tendency of sticking to the knife and work hardening during the machining process. Carbide tools with positive rake website:http://www.cndmmetal.com/stainless-steel-pipe/