904L stainless steel is designed with ultra-low carbon (≤ 0.02%) to suppress intergranular corrosion, high chromium (19.0% -23.0%) to ensure the stability of the oxide film, high nickel (23.0% -28.0%) to stabilize the austenite structure, high molybdenum (4.0% -5.0%) to resist pitting and crevice corrosion, and copper (1.0% -2.0%) to enhance the reducing acid corrosion resistance, forming a multidimensional corrosion protection system that can extend the equipment life to 10-15 years, significantly reducing operation and maintenance costs and safety risks.
SS904L Suppliers
HT PIPE is a well-known stockist and exporter. We are a SS904l material supplier with 15+ export experience. We not only provide pipes, plate, round bars, but also pipe fittings, flanges, etc. Contact us for more information and prices for free.
Stainless steel 904L Application
n08904 material Chemical industry
The chemical industry is one of the core application areas of 904L, which involves a large amount of strong acid, strong alkali, and high chloride media (such as sulfuric acid, nitric acid, hydrochloric acid, chloride solutions), and equipment is exposed to high temperature and high pressure environments for a long time, requiring extremely high corrosion resistance of stainless steel.
Sulfuric acid production and storage equipment
Sulfuric acid is a basic chemical raw material, and its corrosiveness varies greatly depending on its concentration and temperature. In dilute sulfuric acid (concentration below 50%, temperature below 80 ℃) environment, ordinary stainless steel is prone to corrosion, while 904L can be used to make sulfuric acid storage tanks, sulfuric acid transportation pipelines, sulfuric acid pump impellers and other equipment due to the effect of copper element.
Chlor alkali chemical equipment
During the production process of chlor alkali chemical industry, a large amount of chlorine gas, sodium hydroxide solution (caustic soda), and sodium chloride solution are generated, with high chloride ion concentration, which can easily cause pitting corrosion and crevice corrosion. 904L can be used to make ion membrane electrolyzers, caustic soda storage tanks, chlorine gas pipelines, etc. in chlor alkali plants.
ss 1.4539 Oil and gas industry
In the process of oil and gas extraction and processing, the produced fluids from oil and gas wells (including crude oil, water, hydrogen sulfide, and chloride ions) have strong corrosiveness, especially in offshore oil and gas fields (with high chloride ion concentration in seawater) and high sulfur oil and gas fields (hydrogen sulfide is prone to stress corrosion).
Offshore oil and gas field extraction equipment
The production trees, wellhead equipment, and oil pipelines in offshore oil and gas fields are exposed to seawater and oil and gas production fluids for a long time, and 904L can be used to make key components of these equipment.
Oil and gas transmission pipelines
In high sulfur and high chlorine oil and gas transportation scenarios, 904L seamless pipes can be used for pipeline transportation.
tp904l Desalination industry
Desalination of seawater is an important means to solve the shortage of freshwater resources. The main processes include reverse osmosis and multi effect distillation. Equipment that comes into long-term contact with seawater (chloride ion concentration of about 19000mg/L) is prone to pitting and crevice corrosion.
Heat exchanger in multi effect distillation method
The heat exchanger is the core equipment, and there are gaps at the connection between the tube plate and the heat exchange tube, and the temperature is relatively high (about 60 ℃ -70 ℃). The heat exchanger is made of 904L, with seamless 904L heat exchange tubes and forged 904L tube plates.
High pressure pump components in reverse osmosis method
The reverse osmosis method pressurizes seawater to 7MPa-8MPa through a high-pressure pump and filters it through a reverse osmosis membrane. The impeller and pump casing of the high-pressure pump need to withstand high pressure and seawater corrosion.
1.4539 aisi Pharmaceutical and food industries
The requirements for equipment materials in the pharmaceutical and food industries not only include corrosion resistance (to avoid contamination of drugs and food by metal ions), but also need to meet hygiene standards (materials that are easy to clean and free of harmful substances).
Reactors and storage tanks in the pharmaceutical industry
In the production process of antibiotics, vitamins and other drugs, the reaction kettle needs to come into contact with corrosive media such as organic acids and organic solvents, and needs to be cleaned and disinfected regularly (at a temperature of 80 ℃ -121 ℃). The reaction kettle made of 904L has a smooth inner wall, easy to clean, and no metal ion precipitation in organic acid environment.
Juice processing equipment in the food industry
Fruit juice (such as orange juice and lemon juice) contains organic acids (such as citric acid and malic acid), and the processing requires heating (temperature 60 ℃ -80 ℃). Ordinary stainless steel is easily corroded by organic acids, leading to the dissolution of metal ions (such as iron ions), which affects the taste and color of fruit juice.
