TOBO STEEL GROUP CHINA
TOBO ALLOY GROUP TOBO Alloy Group is a mature, steady and energetic high-tech company, specializing in manufacture of high-temperature alloys and corrosion resistant alloys, such as Hastelloy, Haynes,
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Super Duplex Stainless Steel Pipe 2205 2507 UNS S32205 S331803 S332750 S32760
Proudct information
The duplex stainless steels have a microstructure, when heat treated properly, of nearly equal proportions of austenite and ferrite. This microstructure ensures that the duplexes are much more resistant to stress corrosion cracking (SCC) than austenitic stainless steels. The specification 0.2% Proof Stress of the duplexes is more than double that of austenitic stainless steels such as the 304 types andu316L types. This often allows down gauging in the design, depending on Young’s Modulus and buckling limitations.
The microstructures inside duplex stainless steels are approximately 50 per cent austenite and 50 per cent ferrite, and consequently duplex products share the physical properties of both ferritic and austenitic grades. Duplex stainless steels are resistant to the cracking caused by chloride stress corrosion in austenitic grades, and have improved resistance to localised corrosion. This family of stainless steels has roughly twice the yield strength of their counterpart austenitic grades which means we can use it to design thinner gauge tubing. Higher hardness values provide better wear resistance for high precision tubes.
Duplex steels are easily welded and formed, similar to austenitic grades. Depending on chromium, nickel and molybdenum content, duplex stainless steels are divided into four main categories: lean duplex, duplex, super duplex and hyper duplex. This family of alloys has great advantages in both material and engineered fabrication costs.
Typical applications for this alloy group include heat exchanger tubes, umbilicals, structural tanks, pulp and paper making equipment, pipes and fittings, and seawater handling systems.
Chemical Composition :
The chemical composition of stainless steel grade Super Duplex 2205 is outlined in the following table.
| Element | Content (%) |
|---|---|
| Chromium, Cr | 24 – 26 |
| Nickel, Ni | 6 – 8 |
| Molybdenum, Mo | 3 – 5 |
| Manganese, Mn | 1.20 max |
| Silicon, Si | 0.80 max |
| Copper, Cu | 0.50 max |
| Nitrogen, N | 0.24 – 0.32 |
| Phosphorous, P | 0.035 max |
| Carbon, C | 0.030 max |
| Sulfur, S | 0.020 max |
| Iron, Fe | Balance |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm3 | 0.281 lb/in3 |
| Melting point | 1350°C | 2460°F |
Applications:
Super Duplex 2205 is widely used in the following sectors:
Power,Marine,Chemical,Pulp and paper,Petrochemical,Water desalinization,Oil and gas production
Products made using Super Duplex 2205 include:
Fans,Wire,Fittings,Cargo tanks,Water heaters,Storage vessels,Hydraulic piping,Heat exchangers
Hot water tanks,Spiral wound gaskets,Lifting and pulley equipment,Propellers, rotors, and shafts.
Factory information
| 1) Company Name | Hunan Green & Innovative Materials Co., LTD., |
| 2) Business Type | Manufacturer |
| 3) Number of Employees | 100-150people |
| 4)Factory Size | 17,400 square meters |
| 5) Trade & Market | North America ,South America ,Eastern Europe ,Southeast Asia ,Eastern Europe ,Western Europe |
| 6) Export Percentage | 50% - 60% |
| 7)Application | Industrial air conditioning,heater,evaporator, condenser car exhaust pipes,underfloor heating pipe,water pipe,oil pipe,gas pipe |
| 8) Attention | products all with high quality and competitive price |
Hunan Green & Innovative Materials Co., LTD., located in Gaoxi Industrial park ,louxing district ,Loudi ,Hunan Province .The main products are stainless steel straight seam welded steel pipe, corrugated pipe and efficient pitted surface pipe.
