304 stainless steel pipe is a grade of stainless steel produced in accordance with the American ASTM standard. 304 contains 19% chromium and 9% nickel. German Executive Standard: DIN 2462.
304 stainless steel is a general purpose stainless steel material with stronger rust resistance than the 200 series stainless steel material. 304 stainless steel has excellent stainless corrosion resistance and good resistance to intergranular corrosion.
304 stainless steel material concentration ≤ 65% of the boiling temperature below the nitric acid, has a strong resistance to corrosion. To alkali solutions and most organic and inorganic acids also have good corrosion resistance.
In the air or chemically corrosive media can resist corrosion of a high alloy steel, stainless steel is a beautiful surface and good corrosion resistance, do not have to be plated and other surface treatment, and play the inherent surface properties of stainless steel, used in many aspects of a kind of steel, usually called stainless steel. The performance of 13 chromium steel, 18-8 chromium-nickel steel and other high-alloy steels are represented.
From a metallographic point of view, because stainless steel contains chromium and the surface of the formation of a very thin chromium film, this film isolated from the intrusion of oxygen and steel to play a role in corrosion resistance. In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium.
304 stainless steel pipe is a general purpose stainless steel pipe, mainly used in the following applications
1、Stainless steel seamless steel pipe for structure (GB/T14975) is a seamless steel pipe used for corrosion-resistant pipes and structural parts for general chemical, petroleum, light textile, medical, food and mechanical industries.
2、Stainless steel seamless steel pipe for fluid transportation (GB/T14976-2012) is a general seamless steel pipe used for the transportation of water, oil, gas, acid, alkali, and other corrosive media fluids.
3, low and medium pressure boiler stainless steel seamless steel pipe (GB13296 is used for the manufacture of various structures of low and medium pressure boiler superheated steam tube, boiling water tube and locomotive boiler with superheated steam tube, large smoke tube, small smoke tube and arch brick tube with high quality carbon structural steel hot rolled and cold drawn (rolled) seamless steel pipe.
4、High pressure urea grade stainless steel seamless steel pipe for fertilizer equipment is a high quality structural steel and alloy steel seamless steel pipe suitable for chemical equipment and pipelines with working temperature of -40~400℃ and working pressure of 10~30Ma.
5、Stainless steel seamless steel pipe for petroleum cracking (GB13296-2013) is a seamless steel pipe for furnace tubes, heat exchangers and pipelines in petroleum refineries.
6, stainless steel seamless steel pipe for ships (GB13296-2013) is a seamless stainless steel pipe for the manufacture of Class I pressure-resistant pipe system, Class II pressure-resistant pipe system, boilers and superheaters for ships. Stainless steel seamless steel pipe wall working temperature does not exceed 450 ℃, alloy steel seamless steel pipe wall working temperature exceeds 450 ℃.
7, automotive half-shaft casing with stainless steel seamless steel pipe (GB3088-82) is the manufacture of automotive half-shaft casing and drive axle casing axle tube with stainless steel pipe 9, diesel engines with high-pressure oil pipe (ASTMA269) is the manufacture of diesel injection system high-pressure tube with cold-drawn seamless steel pipe.
8、Precision bore seamless steel tubes for hydraulic and pneumatic cylinder barrels (GB8713-88) are cold-drawn or cold-rolled precision seamless steel tubes with precision bore dimensions for the manufacture of hydraulic and pneumatic cylinder barrels.
9, cold-drawn or cold-rolled precision seamless steel tube (GB3639-2000) is used for mechanical structures, hydraulic equipment with high dimensional accuracy and good surface finish of cold-drawn or cold-rolled precision seamless steel tube. The choice of precision seamless steel tube manufacturing mechanical structures or hydraulic equipment, etc., can greatly save machining hours, improve material utilization, while helping TISCO stainless steel tube manufacturers to improve product quality.