Duplex Stainless Steel Pipes, Duplex Stainless Steel Tubes, Duplex Stainless Steel Seamless Pipe & Tubes, Duplex Stainless Steel Welded Pipes and Tubes, Duplex Stainless Steel Tubing.

Manufacturing Duplex Stainless Steel Pipes and Tubes in ASME SA / ASTM A789, A790, A928 in Grades UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF 2205, SAF 2507, ZERON 100 etc.

DUPLEX STAINLESS STEEL PIPES AND TUBES

MAH Metal Inc., we carry a full inventory of Duplex Stainless Steel Pipes and Tube and Supply Duplex Stainless Steel Pipes and Tube their microstructures consist of a mixture of austenite and ferrite phases.As a result, duplex stainless steels display properties characteristic of both austenitic and ferritic  stainless steels.

We Supply Duplex Stainless Steel Pipes and Tubes in Specification ASME SA / ASTM A789, A790, A928 and Grades UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF 2205, SAF 2507 etc. The grade indicates the testing methods required for a given application.

MAH Metal Inc. specializes in Duplex Stainless Steel Pipes and Tube with years of Experience in Manufacturing Duplex Stainless Steel Pipes and Tube. we offer high quality, lower cost but the best service. As a result to that our Duplex Stainless Steel Pipes and Tubes export account today is in various countries like Iran, Iraq, Kuwait, Saudi Arabia, Oman, UAE, Singapore, Malaysia, Indonesia, South korea, Chile, Peru, Venezuela, Australia, Nigeria, Angola, Senegal, Mozambique, Algeria, Libya, Azerbaijan, Netherlands, Brazil, Norway, United Kingdom, Mexico, Canada etc.

DUPLEX STAINLESS STEEL PIPES AND TUBES MANUFACTURER, STOCKHOLDER AND SUPPLIER

Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. The picture shows the yellow austenitic phase as “islands” surrounded by the blue ferritic phase. When duplex stainless steel is melted it solidifies from the liquid phase to a completely ferritic structure. As the material cools to room temperature, about half of the ferritic grains transform to austenitic grains (“islands”). The result is a microstructure of roughly 50% austenite and 50% ferrite..

Whilst duplex stainless steel are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steel. However, the corrosion resistance of the least resistant Duplex stainless steel is greater than that for the most commonly used grades of stainless steel, i.e. 304 and 316.

Duplex stainless steel are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.

DUPLEX STAINLESS STEEL PIPES AND TUBES

CHEMICAL AND MECHANICAL PROPERTIES OF DUPLEX STAINLESS STEEL PIPES AND TUBES

Corrosion Resistance of Duplex stainless steel
Duplex stainless steel are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, Duplex stainless steel exhibit very high resistance to stress corrosion cracking.
The super duplex grades are even more resistant to corrosion.

Heat Resistance of Duplex stainless steel
The high chromium content of Duplex stainless steel that p rotects against corrosion, causes embrittlement at temperatures over about 300°C.
At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.

Fabrication of Duplex stainless steel
Fabrication of all stainless steel should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.

Heat Treatment of Duplex stainless steel
Duplex stainless steel cannot be hardened by heat treatment. They can however be work hardened.
Solution treatment or annealing can be done by rapid cooling after heating to around 1100°C.

Machinability
Although machinable, the high strengths of Duplex stainless steel makes machining difficult. As an example, machining of 2205 is around 20% slower than for 304.
Machining can be enhanced by using the following rules:

• Cutting edges must be kept sharp. Dull edges cause excess work hardening.
• Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.
• Chip breakers should be employed to assist in ensuring swarf remains clear of the work
• Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.

Welding of Duplex stainless steel
Duplex stainless steel have good weldability. All standard welding processes can be used. They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex grades reduces distortion and residual stresses after welding. The recommended filler material for 2205 stainless steel is 2209.

DUPLEX STAINLESS STEEL PIPES AND TUBES APPLICATIONS

The Duplex Stainless Steel Pipes and Tubes is used in the following applications:-

• Chemical processing, transport and storage
• Oil and gas exploration and offshore rigs
• Oil and gas refining
• Marine environments
• Pollution control equipment
• Pulp & paper manufacturing
• Chemical process plant

DUPLEX STAINLESS STEEL PIPES AND TUBES SIZES AVAILABLE IN STOCK

SUPPLYING DUPLEX STAINLESS STEEL PIPES AND TUBES TO COUNTRIES -

We Export Duplex Stainless Steel Pipes and Tubes to Saudi Arabia, Iran, Iraq, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Israel, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Mayanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Costa Rica, Puerto Rica, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherland, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, The Republic Of Congo, Gabon, Europe, Africa, Asia, North America, South America, Middle East, Far East.etc

MAH Metal Inc. is a well known worldwide Exporter of Duplex Stainless Steel Pipes and Tubes, MAH Metal Inc. is committed to provide each and every customer with the highest standard of customer service. We deals in Duplex Stainless Steel Pipes and Tube in India and Overseas, offering a wide range of Duplex Stainless Steel Pipes and Tubes

    PRODUCTS

• Stainless Steel Pipe & Tube
• Stainless Steel Seamless Pipe
• Stainless Steel Welded Pipe
• Stainless Steel Seamless Tube
• Stainless Steel Steel EFW Pipe
• Duplex Stainless Steel Pipe & Tube
  • ASTM A790 UNS S32205 Duplex Stainless Steel Seamless Pipe & Tube
  • ASTM A790 UNS S32205 Duplex Stainless Steel Welded Pipe & Tube
  • ASTM A789 UNS S32205 Duplex Stainless Steel Seamless Tube
  • ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe & Tube
  • ASTM A790 UNS S1803 Duplex Stainless Steel Welded Pipe & Tube
  • ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube
  • ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipe & Tube
  • ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipe & Tube
  • ASTM A789 UNS S32750 Super Duplex Stainless Steel Seamless Tube
  • ASTM A790 UNS S32760 Super Duplex Stainless Steel Seamless Pipe & Tube
  • ASTM A790 UNS S32760 Super Duplex Stainless Steel Welded Pipe & Tube
  • ASTM A790 UNS S32760 Super Duplex Stainless Steel Seamless Tube
  • ASTM A928 Duplex Stainless Steel EFW Pipe
• Carbon Steel Seamless Pipe & Tube
• Carbon Steel EFW Pipe
• API 5L Seamless Pipe
• ISO 3183 Seamless Pipe
• ISO 3183 Welded SAW Pipe
• API 5L LSAW Welded Pipe
• Alloy Steel Seamless Pipe & Tube
• Chrome Moly Alloy Seamless Pipe & Tube
• Alloy Steel EFW Pipe
• Inconel Pipe & Tube
• Incoloy Pipe & Tube
• Monel 400 Pipe & Tube
• Hastelloy Pipe & Tube
• Titanium Alloy Pipe & Tube
• Copper and Cupro Nickel Pipe & Tube