2B 0.5mm Welded Stainless Steel Hollow Pipe DIN Seamless Duplex 2507 Pipe
2507 stainless steel pipe description
2507 stainless steel pipe 2057 stainless steel seamless pipe 2057 stainless steel welded pipe 2507 stainless steel pipe
2507 is a ferritic austenitic (duplex) stainless steel with excellent resistance to spot corrosion, crevice corrosion and uniform corrosion.
Chinese name 2507 stainless steel
Foreign name 2507 Stainless steel
Alias: super duplex stainless steel
Composition 25Cr-7Ni-4Mo-0.27
NEURONORM1.4410 - X2 Cr Ni MoN 25.7.4
2507 is a ferritic austenitic (duplex) stainless steel, which combines the most beneficial properties of many ferritic and austenitic steels. Because the content of chromium and molybdenum in this steel is very high, it has excellent resistance to spot corrosion, crevice corrosion and uniform corrosion The dual phase microstructure ensures that the steel has high resistance to stress corrosion cracking and high mechanical strength
2507 stainless steel is used in oil and natural gas industry; Offshore stone skyshatter oil platform (heat exchanger pipe, water treatment and water supply system, fire protection system, water spraying system, water stabilization system; petrochemical equipment; desalination (desalination) equipment (and high-pressure pipe and seawater pipe in the equipment); Mechanical and structural components with high strength and corrosion resistance are required; Fuel (waste) gas purification equipment. Main composition: 25Cr-7Ni-4Mo-0.27N
Corrosion resistance
1. Corrosion resistance
The high chromium and molybdenum content of SAF 2507 makes it have a strong overall corrosion resistance to organic acids such as formic acid and acetic acid SAF2507 alloy also has strong corrosion resistance to inorganic acids, especially those containing chlorides
Compared with 904L, SAF2507 has stronger corrosion resistance to diluted sulfuric acid mixed with chloride ion. 904L is an alloy in austenitic state and is specially used to resist pure sulfuric acid corrosion
Grade 316L cannot be used in hydrochloric acid environment, it may suffer local corrosion or overall corrosion. SAF2507 can be used in diluted hydrochloric acid environment, with strong resistance to spot damage and crack corrosion
2. Intergranular corrosion
The low carbon content of SAF 2507 greatly reduces the risk of carbide precipitation in the intergranular during heat treatment. Therefore, this alloy has strong resistance to intergranular corrosion related to carbides
3. Stress corrosion cracking
The compound structure of SAF 2507 makes it have strong resistance to stress corrosion cracking. Because of its high alloy content, the corrosion resistance and strength of SAF 2507 are better than 2205
Cracks are almost inevitable in construction, which makes stainless steel more vulnerable to corrosion in chloride environment SAF 2507 has a strong ability to resist crack corrosion The isocorrosion curve of SAF 2507 in sulfuric acid containing 2000ppm chloride ion is 0.1mm/year; Isocorrosion curve in hydrochloric acid 0.1 mm/year
Mechanical characteristics: SAF 2507 has high compressive strength, impact strength, low coefficient of thermal expansion and high thermal conductivity. These characteristics are applicable to many structural parts and mechanical components SAF 2507 has high impact strength and should not be placed in the temperature environment higher than 570 ° F for a long time, which may weaken its toughness. Tensile strength: σ b≥730Mpa； Elongation: δ ≥20%
Supporting welding materials: ER2594 welding wire, E2594 welding rod
Applications: pulp and paper industry, seawater desalination, flue gas purification, heat exchanger, chemical tanker pipeline system, seawater system, etc.
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| Specification table of seamless steel pipe |
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| Type | Specification | Specification | Specification | Specification | Remark |
| Specification of seamless steel pipe |
20*2-5 | 114*4-22 | 377*6-110 | 1110*10-80 | Seamless steel pipe can accept non-standard customization |
| 25*2-6 | 133*4-22 | 426*8-140 | 1120*12-60 | ||
| 30*3-6 | 140*4-45 | 457*8-140 | 2000*10-50 | ||
| 38*2-6 | 159*4-45 | 480*8-150 | 6*0.5-5 | ||
| 42*3-8 | 168*4-45 | 530*8-150 | 8*0.5-5 | ||
| 45*3-8 | 180*4-48 | 580*8-150 | 10*0.5-5 | ||
| 51*3-8 | 194*6-48 | 630*8-150 | 12*0.5-5 | ||
| 57*3-16 | 203*6-70 | 720*8-150 | 14*0.5-5 | ||
| 60*3-18 | 219*6-70 | 820*8-150 | 15*0.5-5 | ||
| 76*3-18 | 273*6-70 | 920*8-100 | 16*0.5-5 | ||
| 89*3-18 | 299*6-80 | 1020*8-110 | 18*0.5-5 | ||
| 95*6-22 | 325*6-100 | 1040*8-110 | |||
| 108*4-22 | 351*6-110 | 1060*8-110 | |||
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