Specs: 2507 (UNS S32750)
A 25Cr Duplex Stainless Steel
General Properties
Applications
Standards
Corrosion Resistance
Chemical Analysis
Mechanical Properties
Physical Properties
Processing
Welding
MD Exports LLP is India's one of the largest supplier, Exporter & Stockholder of 2507 Duplex Stainless SteelPipes, Tubes, Fittings, Flanges, Fasteners, Platesand Bar. A rejection rate of less than one percent has consolidated the claim. The primary reason for this is the priority that we give to complete satisfaction of the customer. This includes our excellent after sales services,We have supplied 2507 Duplex Stainless SteelPipes, Tubes, Fittings, Flanges, Fasteners, Platesand BarPetrochemical plants, Nuclear power projects, Oil & gas industriesin south Africa, Australia, new Zealand, Gambia, Ghana, Guinea, Nigeria, Egypt, Morocco, Sudan, Kenya, Mozambique, Zimbabwe, Madagascar, Tunisia, Saudi Arabia, kuwait, Qatar, U.A.E,& Turkey
in Africa Citizen Metal is No. 1 Supplier & exporter of 2507 Duplex Stainless SteelPipes, Tubes, Fittings, Flanges, Fasteners, Platesand Barfrom INDIA
We are having wide range of sizes in our stock of 2507 DuplexStainless Steel & 2205 Super Duplex Stainless Steel Pipes, Tubes, Fittings, Flanges, Fasteners, Plates and Bar .
Since 2008, there has been a major demand for Duplex Steel Pipes, Tubes, Fittings, Flanges, Fasteners, Plates and Bar due to its excellent corrosion resistance quality. It resists inter-granular and crevice corrosion. It also shows appreciable resistance to pitting. Chloride stress corrosion cracking is also dealt with easily using Duplex 2507, at a temperature of 150 degree Celsius. It proves to be an excellent substitute of austenitic grades in marine environments. It shows good thermal resistance up to a range of 300 degree Celsius. It can be easily welded by most of the standard methods, the only compulsion being the use of filler metals. The machinability is low on account of its high strength.and MD Exports LLP has been actively involved in ensuring the best quality of the same to our clients.
This exotic alloy is used in oil and gas exploration, chemical processing industries also make use of this alloy. Most of the processing equipment utilizes Duplex 2507. It is also used by storage and transportation units of industries. Pulp and paper digesters, liquor tanks and paper machines also use Duplex 2507. It is highly suitable for usage in marine environments
UNS S32750 (F53 / 1.4410 / Alloy 2507) exhibits a low coefficient of thermal expansion and higher heat conductivity than austenitic steels and is suitable for working temperatures up to 300°C.
Listed in NACE MR 01 75 for sour service UNS S32750 (F53 / 1.4401) and having gained ASME Approval for Pressure Vessel applications Alloy 32750 can be used in a wide variety of applications.
2507 Super Duplex Steel Bar Sizes Available
2507 Super Duplex Steel Plate Sizes Available
2507 Super Duplex Steel PIpe Sizes Available
Alloy 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion.
Value Added Processes:
Machincut Rings and Discs
up to 124" (3150mm) OD
Drilling, Tapping, & Counterboring, Contour Machincutting, Custom Fabricated Products, Abrasive Waterjet Cutting, Bandsaw Cutting, Laser Cutting, Rolled & Code Welded, Rings or Segments, Polishing
High Definition Plasma Cutting, Plasma Cutting , Flattening Milling, Plasma Beveling, Machine Beveling
Product Information:
E-Z Drill Plate
High Performance
Nickel Alloys
Hub-Less Plate Flanges
Wide Plate
Duplex Stainless Plate
General Properties
Alloy 2507 is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion.
The impact strength is also high. Alloy 2507 is not recommended for applications which require long exposures to temperatures above 570°F because of the risk of a reduction in toughness.
Standards
ASTM/ASME .......... A240 - UNS S32750
EURONORM............ 1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR.................... Z3 CN 25.06 Az
Corrosion Resistance
General Corrosion
The high chromium and molybdenum content of 2507 makes it extremely resistant to uniform corrosion by organic acids like formic and acetic acid. 2507 also provides excellent resistance to inorganic acids, especially those containing chlorides.
In dilute sulfuric acid contaminated with chloride ions, 2507 has better corrosion resistance than 904L, which is a highly alloyed austenitic steel grade specially designed to resist pure sulfuric acid.
Stainless steel of type 316L (2.5%Mo) cannot be used in hydrochloric acid due to the risk of localized and uniform corrosion. However, 2507 can be used in dilute hydrochloric acid. Pitting need not be a risk in the zone below the borderline in this figure, but crevices must be avoided.
Isocorrosion curves, 0.1 mm/year, in sulfuric acid with an addition of 2000 ppm chloride ions | Isocorrosion curves, 0.1 mm/year, in hydrochloric acid. Broken line curve represents the boiling point | Critical Pitting Temperature (CPT) range for various alloys in 1M NACl | Critical Crevice Corrosion Temperature (CCT) for various alloys in 10% FeCl3 |
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Intergranural Corrosion
2507’s low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment; therefore, the alloy is highly resistant to carbide-related intergranular corrosion.
Stress Corrosion Cracking
The duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC). Because of its higher alloy content, 2507 is superior to 2205 in corrosion resistance and strength. 2507 is especially useful in offshore oil and gas applications and in wells with either naturally high brine levels or where brine has been injected to enhance recovery.
Pitting Corrosion
Different testing methods can be used to establish the pitting resistance of steels in chloride-containing solutions. The data above were measured by an electrochemical technique based on ASTM G 61. The critical pitting temperatures (CPT) of several high-performance steels in a 1M sodium chloride solution were determined. The results illustrate the excellent resistance of 2507 to pitting corrosion. The normal data spread for each grade is indicated by the dark gray portion of the bar.
Crevice Corrosion
The presence of crevices, almost unavoidable in practical constructions and operations, makes stainless steels more susceptable to corrosion in chloride enviroments. 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of 2507 and several other high-performance stainless steels are shown above.
Chemical Analysis
Typical values (Weight %)
C | Cr | Ni | Mo | N | Others |
0.020 | 25 | 7 | 4.0 | .27 | S=0.001 |
PREN = [Cr%] + 3.3 [Mo%] + 16 [N%] ≥ 40 |
Mechanical Properties
Mechanical and Physical Properties
2507 combines high tensile and impact strength with a low coefficient of thermal expansion and high thermal conductivity. These properties are suitable for many structural and mechanical components. The low, ambient, and elevated temperature mechanical properties of 2507 sheet and plate are shown below. All of the test data shown are for samples in the annealed and quenched condition.
2507 is not recommended for applications which require long exposures to temperatures in excess of 570°F because of the increased risk of a reduction in toughness. The data listed here are typical for wrought products and should not be regarded as a maximum or minimum value unless specifically stated.
Mechanical Properties
0.2% Offset Yield Strength 0.2%, ksi | 80 min. |
Ultimate Tensile Strength, ksi | 116 min. |
0.1% Offset Yield Strength 0.2%, ksi | 91 min. |
Elongation in 2 inches, % | 15 min. |
Hardness Rockwell C | 32 max. |
Impact Energy, ft.-lbs. | 74 min. |
Low Temperature Impact Properties
Temperature °F | RT | 34 | -4 | -40 |
Ft.-lbs. | 162 | 162 | 155 | 140 |
Temperature °F | -76 | -112 | -148 | -320 |
Ft.-lbs. | 110 | 44 | 30 | 7 |
Elevated Temperature Tensile Properties
Temperature °F | 68 | 212 | 302 | 392 | 482 |
0.2% Offset Yield Strength, ksi | 80 | 65 | 61 | 58 | 55 |
Ultimate Tensile Strength, ksi | 116 | 101 | 98 | 95 | 94 |
Density | lb/in3 | 0.28 |
Modulus of Elasticity | psi x 106 | 29 |
Coefficient of Thermal Expansion 68-212°F/°F | x10-6/°F | 7.2 |
Thermal Conductivity | Btu/h ft °F | 8.7 |
Heat Capacity | Btu/lb/°F | 0.12 |
Electrical Resistivity | W-in x 10-6 | 31.5 |
Processing
Hot forming
2507 should be hot worked between 1875°F and 2250°F. This should be followed by a solution anneal at 1925°F minimum and a rapid air or water quench.
Cold Forming
Most of the common stainless steel forming methods can be used for cold working 2507. The alloy has a higher yield strength and lower ductility than the austenitic steels so fabricators may find that higher forming forces, increased radius of bending, and increased allowance for springback are necessary. Deep drawing, stretch forming, and similar processes are more difficult to perform on 2507 than on an austenitic stainless steel. When forming requires more than 10% cold deformation, a solution anneal and quench are recommended.
Heat Treatment
2507 should be solution annealed and quenched after either hot or cold forming. Solution annealing should be done at a minimum of 1925°F. Annealing should be followed immediately by a rapid air or water quench. To obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.
2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), plasma arc welding (PAW), flux cored wire (FCW), or submerged arc welding (SAW). 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure.
Preheating of 2507 is not necessary except to prevent condensation on cold metal. The interpass weld temperature should not exceed 300°F or the weld integrity can be adversely affected. The root should be shielded with argon or 90% N2/10% H2 purging gas for maximum corrosion resistance. The latter provides better corrosion resistance.
If welding is to be done on only one surface and post-weld cleaning is not possible, GTAW is suggested for root passes. GTAW or PAW should not be done without a filler metal unless post-weld cleanup is possible. A heat input of 5-38 kJ/in. should be used for SMAW or GTAW. A heat input of about 50kJ/in. can be used for SAW.
NOTE
2205 Code Plus Two and 254 SMO are registered trademarks of Outokumpu Stainless, Inc.
This technical data and information represents our best knowledge at the time of printing. However, it may be subject to some slight variations due to our ongoing research program on corrosion resistant grades.
We, therefore, suggest that information be verified at time of inquiry or order. Furthermore, in service, real conditions are specific for each application. The data presented here is only for the purpose of description and may only be considered as guarantees when our Company has given formal written approval.
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Products | Duplex Steel Flanges, 2205and 2507 Grades. |
Industry We Serve | Duplex Stainless Steel Flanges Supplied Oil & Gas Industry, Petrochemical Companies, Seashore Industries, Refinery, Petroleum Refineries, Oil Refining Industry, Beverage, Water Piping Systems, Acid & Chemical Plants, Pharmacy Industry etc.. |
Country | More Then 2700 CLIENT OFDuplex Stainless Steel Flanges in Kuwait, Peru, UK, Singapore, Poland, Iraq, Malaysia, Serbia, Turkey, Yemen, Australia, Lebanon, Oman, Srilanka, Egypt, Angola, Canada, Madagascar, Saudi Arabia, Indonesia, UAE, Italy, Jordan, USA, Brazil, Nigeria, South Africa, Mexico, New Zealand, Netherlands, Germany, Venezuela, Iran, Denmark, Spain, Bahrainetc.... |
Products | Duplex Steel 2205and 2507 Pipe |
Industry We Serve | production & transportation of Oil & Gas : Duplex 2205 Stainless Steel Pipes for Industrial Use in Architecture, Building, Construction, Transportation, Chemical, Energy, Seaports, Seashore, Catering and Process Industry. |
Country | More Then 1900 CLIENTSof Duplex Stainless Steel Pipes & Tubes in Kuwait, Peru, UK, Singapore, Poland, Iraq, Malaysia, Serbia, Turkey, Yemen, Australia, Lebanon, Oman, Srilanka, Egypt, Angola, Canada, Madagascar, Saudi Arabia, Indonesia, UAE, Italy, Jordan, USA, Brazil, Nigeria, South Africa, Mexico, New Zealand, Netherlands, Germany, Venezuela, Iran, Denmark, Spain, Bahrain etc.... |
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Industry We Serve | Heat exchangers Manufacturers & cooling pipes Manufacturers Industry. |
Country | More Then 1700 CLIENTS OFDuplex Stainless Steel Tubing in Kuwait, Peru, UK, Singapore, Poland, Iraq, Malaysia, Serbia, Turkey, Yemen, Australia, Lebanon, Oman, Srilanka, Egypt, Angola, Canada, Madagascar, Saudi Arabia, Indonesia, UAE, Italy, Jordan, USA, Brazil, Nigeria, South Africa, Mexico, New Zealand, Netherlands, Germany, Venezuela, Iran, Denmark, Spain, Bahrain etc.... |
Products | Duplex Steel Sheet & Plate |
Industry We Serve | storage tanks manufacturers, pharmaceutical or food processing Industry, pulp and paper industry (Duplex stainless steel plate USE: Duplex stainless steel plate is often used for storage tanks. High corrosion and erosion resistance is a must for storage tanks, whether the designer wants to prevent leakage during desalinization, avoid contamination in pharmaceutical or food processing, or store chips as well as black and white liquor for the pulp and paper industry.) |
Country | More Then 2800 CLIENTS OFDuplex Steel Plates., We Supplied Duplex Stainless Steel Plates in Kuwait, Peru, UK, Singapore, Poland, Iraq, Malaysia, Serbia, Turkey, Yemen, Australia, Lebanon, Oman, Srilanka, Egypt, Angola, Canada, Madagascar, Saudi Arabia, Indonesia, UAE, Italy, Jordan, USA, Brazil, Nigeria, South Africa, Mexico, New Zealand, Netherlands, Germany, Venezuela, Iran, Denmark, Spain, Bahrain etc.... |
Products | Duplex Steel 2205& 2507 Bolts, Duplex Steel 2205& 2507 Washer, Duplex Steel 2205& 2507 Screws, Duplex Steel 2205& 2507 Nuts |
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