- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
loading
| Availability: | |
|---|---|
| Quantity: | |
M5, M6, M7, M8, M10, M12, M14, M16, M18, M20, M22, M24
This series of products is specially designed for extreme working conditions. They adopt advanced metallurgical processes and precise manufacturing techniques, covering categories: duplex stainless steel, super austenitic stainless steel, The products strictly comply with international mainstream standards such as GB, DIN, ISO, JIS, ANSI/ASME, etc., and are widely used in high-end equipment manufacturing fields such as petrochemicals, marine engineering, nuclear power equipment, rail transport
This series of products is specially designed for extreme working conditions. They adopt advanced metallurgical processes and precise manufacturing techniques, covering categories: duplex stainless steel, super austenitic stainless steel, The products strictly comply with international mainstream standards such as GB, DIN, ISO, JIS, ANSI/ASME, etc., and are widely used in high-end equipment manufacturing fields such as petrochemicals, marine engineering, nuclear power equipment, rail transport
1. Extremely high strength performance
The yield strength of 2205 is approximately 450 MPa, which is nearly twice that of ordinary austenitic stainless steels (such as 304, 316). This means that under the same load conditions, thinner material sections can be used, achieving significant weight reduction and cost savings. The tensile strength can reach over 620 MPa, suitable for high-pressure equipment and structural components.
2. Outstanding resistance to stress corrosion cracking
The duplex structure has natural resistance to stress corrosion cracking (SCC), especially in chloride-containing environments. The SCC resistance of 2205 in chloride environments is much better than that of 304 and 316, approaching or even exceeding 904L, making it an ideal choice for harsh environments such as seawater, salt fog, and chemical brine.
3. Excellent resistance to pitting and crevice corrosion
Containing 3-3.5% molybdenum and approximately 22% chromium, the pitting resistance equivalent (PREN) is about 35-37, comparable to 904L, significantly superior to 316 stainless steel. In seawater, halide-containing media, and high-concentration salt solutions, it can effectively resist the occurrence of pitting and crevice corrosion.
4. Good fatigue resistance
The fine-grained structure of the duplex phase endows 2205 with excellent fatigue resistance, capable of withstanding cyclic loads and vibration conditions. This advantage is particularly important in dynamic equipment such as pump shafts, valve rods, and mixers, prolonging the equipment's service life.
5. Excellent thermal conductivity
The presence of ferrite phase makes the thermal conductivity of 2205 approximately 1.3-1.5 times that of austenitic stainless steel, facilitating the improvement of heat exchange efficiency. In heat exchange equipment such as heat exchangers and condensers, a more compact design or higher heat transfer efficiency can be achieved.
6. Lower thermal expansion coefficient
The thermal expansion coefficient of 2205 is between that of austenitic and ferrite stainless steels, approximately 30% lower than 304. This characteristic reduces thermal stress and deformation caused by temperature changes, facilitating the dimensional stability and sealing reliability of high-temperature equipment.
7. Good welding performance
Conventional welding methods can be used, and the control of the austenite-ferrite balance in the welding heat affected zone (HAZ) is relatively easy. Although the heat input needs to be controlled to avoid excessive ferrite formation, the overall welding process is mature, and post-welding generally does not require heat treatment.
8. Cost advantage
Although the unit price is higher than 316 stainless steel, due to the doubled strength, the actual use can reduce the thickness of the material, and the overall material cost can be reduced by 20-30%. At the same time, longer service life and lower maintenance requirements result in a significant advantage in the total life cycle cost.
1. Extremely high strength performance
The yield strength of 2205 is approximately 450 MPa, which is nearly twice that of ordinary austenitic stainless steels (such as 304, 316). This means that under the same load conditions, thinner material sections can be used, achieving significant weight reduction and cost savings. The tensile strength can reach over 620 MPa, suitable for high-pressure equipment and structural components.
2. Outstanding resistance to stress corrosion cracking
The duplex structure has natural resistance to stress corrosion cracking (SCC), especially in chloride-containing environments. The SCC resistance of 2205 in chloride environments is much better than that of 304 and 316, approaching or even exceeding 904L, making it an ideal choice for harsh environments such as seawater, salt fog, and chemical brine.
3. Excellent resistance to pitting and crevice corrosion
Containing 3-3.5% molybdenum and approximately 22% chromium, the pitting resistance equivalent (PREN) is about 35-37, comparable to 904L, significantly superior to 316 stainless steel. In seawater, halide-containing media, and high-concentration salt solutions, it can effectively resist the occurrence of pitting and crevice corrosion.
4. Good fatigue resistance
The fine-grained structure of the duplex phase endows 2205 with excellent fatigue resistance, capable of withstanding cyclic loads and vibration conditions. This advantage is particularly important in dynamic equipment such as pump shafts, valve rods, and mixers, prolonging the equipment's service life.
5. Excellent thermal conductivity
The presence of ferrite phase makes the thermal conductivity of 2205 approximately 1.3-1.5 times that of austenitic stainless steel, facilitating the improvement of heat exchange efficiency. In heat exchange equipment such as heat exchangers and condensers, a more compact design or higher heat transfer efficiency can be achieved.
6. Lower thermal expansion coefficient
The thermal expansion coefficient of 2205 is between that of austenitic and ferrite stainless steels, approximately 30% lower than 304. This characteristic reduces thermal stress and deformation caused by temperature changes, facilitating the dimensional stability and sealing reliability of high-temperature equipment.
7. Good welding performance
Conventional welding methods can be used, and the control of the austenite-ferrite balance in the welding heat affected zone (HAZ) is relatively easy. Although the heat input needs to be controlled to avoid excessive ferrite formation, the overall welding process is mature, and post-welding generally does not require heat treatment.
8. Cost advantage
Although the unit price is higher than 316 stainless steel, due to the doubled strength, the actual use can reduce the thickness of the material, and the overall material cost can be reduced by 20-30%. At the same time, longer service life and lower maintenance requirements result in a significant advantage in the total life cycle cost.
Core advantages: The yield strength can reach 400-550 MPa, which is twice that of ordinary austenitic stainless steel. During design, it can significantly reduce the material usage. In environments containing chloride ions, it exhibits outstanding resistance to pitting corrosion, crevice corrosion and stress corrosion.
Key differences from austenitic stainless steel
The magnetic property of 2205 is significant (due to the ferrite phase), which can be a limitation in certain non-magnetic application scenarios. Although its low-temperature toughness is superior to that of ferritic steel, it is not as good as that of austenitic steel. It is generally recommended for use in environments above -50°C. It has a strong tendency to undergo work hardening, and cold forming is more difficult than that of 304. However, complex shape processing can be achieved through appropriate process control.
Core advantages: The yield strength can reach 400-550 MPa, which is twice that of ordinary austenitic stainless steel. During design, it can significantly reduce the material usage. In environments containing chloride ions, it exhibits outstanding resistance to pitting corrosion, crevice corrosion and stress corrosion.
Key differences from austenitic stainless steel
The magnetic property of 2205 is significant (due to the ferrite phase), which can be a limitation in certain non-magnetic application scenarios. Although its low-temperature toughness is superior to that of ferritic steel, it is not as good as that of austenitic steel. It is generally recommended for use in environments above -50°C. It has a strong tendency to undergo work hardening, and cold forming is more difficult than that of 304. However, complex shape processing can be achieved through appropriate process control.
Petrochemical industry
Equipment such as oil refining units, chemical reactors, transportation pipelines, and heat exchangers are securely connected. 2205 and 2507 duplex steel perform exceptionally well in media containing hydrogen sulfide and chloride ions; 904L is suitable for non-oxidizing acid environments such as sulfuric acid and phosphoric acid.
Marine engineering
Offshore oil platforms, seawater desalination devices, and ship equipment. 2507 super duplex steel has excellent resistance to pitting and crevice corrosion in seawater environments and is the preferred material for marine engineering fasteners.
Nuclear energy
Nuclear island equipment, conventional island equipment, and flue gas desulfurization devices. 660 precipitation hardening steel is used for high-temperature and high-pressure components; 321 stainless steel is used for pipeline systems. rail traffic
High-speed rail, subway vehicle and track infrastructure construction. The products possess high strength, fatigue resistance, vibration resistance and other characteristics, ensuring operational safety.
Environmental protection equipment
Equipment for desulfurization and denitrification of flue gas, sewage treatment, and waste incineration. 317L and 904L have excellent corrosion resistance in environments containing chlorine-containing waste gas and acidic wastewater.
Petrochemical industry
Equipment such as oil refining units, chemical reactors, transportation pipelines, and heat exchangers are securely connected. 2205 and 2507 duplex steel perform exceptionally well in media containing hydrogen sulfide and chloride ions; 904L is suitable for non-oxidizing acid environments such as sulfuric acid and phosphoric acid.
Marine engineering
Offshore oil platforms, seawater desalination devices, and ship equipment. 2507 super duplex steel has excellent resistance to pitting and crevice corrosion in seawater environments and is the preferred material for marine engineering fasteners.
Nuclear energy
Nuclear island equipment, conventional island equipment, and flue gas desulfurization devices. 660 precipitation hardening steel is used for high-temperature and high-pressure components; 321 stainless steel is used for pipeline systems. rail traffic
High-speed rail, subway vehicle and track infrastructure construction. The products possess high strength, fatigue resistance, vibration resistance and other characteristics, ensuring operational safety.
Environmental protection equipment
Equipment for desulfurization and denitrification of flue gas, sewage treatment, and waste incineration. 317L and 904L have excellent corrosion resistance in environments containing chlorine-containing waste gas and acidic wastewater.
