Chemical composition and properties of 904L stainless steel plate：
The chemical composition of 904L stainless steel is the basis of its excellent properties. Its main components include carbon (C) ≤ 0.03%, silicon (Si) ≤ 1.00%, manganese (Mn) ≤ 2.00%, phosphorus (P) ≤ 0.035%, sulfur (S) ≤ 0.03%, nickel (Ni) 23.0%-25.0%, chromium (Cr) 18.0%-20.0%, molybdenum (Mo) 3.0%-4.0%, and copper (Cu) 4.0%-5.0%. High chromium and nickel content, as well as appropriate amounts of copper and molybdenum, enhance the resistance of 904L stainless steel to chloride crevice corrosion and stress corrosion cracking. This stainless steel has almost no pitting and cracks, and its pitting resistance is even better than other steel grades.
In terms of mechanical properties, 904L stainless steel performs well. Its tensile strength can reach 490 N/mm², its yield strength is 216 N/mm², and its elongation is 35%. In addition, the density of 904L stainless steel plate is about 8.24 g/cm³ and the melting point ranges from 1300-1390°C. These performance parameters enable 904L stainless steel plate to maintain stable performance in a variety of application scenarios.
Steel Grade：
Chinese Steel Grade: 00Cr20Ni25Mo4.5Cu
German Steel Grade : 1.4539
American Steel Grade : N08904
European standard: 904L
Specification :
The specifications of the flat panel are:
1*2 meters,
1.5*3 meters,
4*8 feet (1220*2440MM),
1220*3048MM,
1.5*6 meters.
Features：
1、High corrosion resistance：
904L stainless steel plate is known for its excellent corrosion resistance. It contains high amounts of chromium (Cr: 18.0-20.0%), nickel (Ni: 23.0-25.0%) and molybdenum (Mo: 3.0-4.0%), and copper (Cu: 4.0-5.0%) is specially added, which makes it perform well in a variety of corrosive media, especially in strong corrosive environments such as chloride, sulfuric acid and phosphoric acid, its corrosion resistance is far better than ordinary stainless steel. This feature makes 904L stainless steel plate the preferred material in marine engineering, chemical industry, pharmaceutical and other fields.
2、Good mechanical properties：
In addition to corrosion resistance, 904L stainless steel plate also has excellent mechanical properties. It has high strength and hardness while maintaining good plasticity and toughness. This excellent mechanical property enables 904L stainless steel plate to maintain stable performance under harsh environments such as high pressure and high temperature. In addition, its good ductility and machinability also make it perform well in machining and forming processes, meeting the needs of various complex shapes and structures.
3、Excellent weldability：
904L stainless steel plate is easy to weld, and the welded joint also has excellent corrosion resistance and mechanical properties. Commonly used welding methods include manual arc welding, argon arc welding, etc. During the welding process, attention should be paid to controlling the welding temperature to avoid excessive local temperature leading to carbon accumulation and intergranular corrosion. At the same time, choosing the right welding materials and welding process is also the key to ensure welding quality.
Application of 904L stainless steel plate：
* Petroleum and petrochemical equipment, such as reactors in petrochemical equipment.
* Storage and transportation equipment for sulfuric acid, such as heat exchangers.
* Flue gas desulfurization equipment in power plants, the main use parts are: tower body, flue, baffle plate, internal parts, spray system, etc. of the absorption tower. * Scrubbers and fans in organic acid treatment systems.
* Seawater treatment equipment, seawater heat exchangers, papermaking industry equipment, sulfuric acid and nitric acid equipment, acid making, pharmaceutical industry and other chemical equipment,Pressure vessels, food equipment.
* Pharmaceutical factories: centrifuges, reactors, etc.
* Plant foods: soy sauce tanks, cooking wine, salt tanks, equipment and dressings.
