Goodwill Metalloys

Deriving the Duplex name from the presence of both Austenite and Ferrite in similar proportions, Duplex S31803 Plates combine excellent corrosion resistance with high strength. The typical mechanical properties would be double that of a single phase austenitic grade such as 316, while, for example, offering superior stress corrosion cracking resistance in chloride solutions.

Duplex S31803 Plates are extremely corrosion resistant, work hard enable alloys. Their microstructures consist of a mixture of austenite and ferrite phases. As a result, Duplex S31803 Plates display properties characteristic of both austenitic and ferritic stainless steels. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades.

Duplex S31803 Plates are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.

Duplex S31803 Plates are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, Duplex S31803 Plates exhibit very high resistance to stress corrosion cracking. The super duplex grades are even more resistant to corrosion.

The high chromium content of Duplex S31803 Plates that protects against corrosion, causes embrittlement at temperatures over about 300°C. At low temperatures Duplex S31803 Plates have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.

Fabrication of all stainless steels 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.

Although Machin able, the high strengths of Duplex S31803 Plates 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.

Duplex S31803 Plates 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.

Duplex S31803 Plates have good weld ability. 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.

Additional Information:

• Delivery Time: Dispatch within 2 days

We GOODWILL METALLOYS are proficiently engaged in offering Super Duplex S32750 Sheets. Super Duplex S32750 Sheets combines the most desirable characteristics of both ferritic and austenitic steels. It has excellent corrosion resistance to a wide variety of media, with outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments due to its high chromium, molybdenum, and nitrogen level, with Critical Pitting Temperature exceeding 50°C.

The Super Duplex S32750 microstructure gives this grade high strength a low coefficient of thermal expansion and higher heat conductivity than austenitic steels and is suitable for working temperatures up to 300°C.
Our service and having gained ASME Approval for Pressure Vessel applications it can be used in a wide variety of applications.

Components in offshore, waste water, sea water desalination and chemical plants with aggressive chloride-containing media e.g. heat exchangers, compressor and pump components.

Additional Information:

• Delivery Time: Dispatch within 2 days

Deriving the Duplex name from the presence of both Austenite and Ferrite in similar proportions, Duplex S31803 Sheets combine excellent corrosion resistance with high strength. The typical mechanical properties would be double that of a single phase austenitic grade such as 316, while, for example, offering superior stress corrosion cracking resistance in chloride solutions.

Duplex S31803 Sheets are extremely corrosion resistant, work hard enable alloys. Their microstructures consist of a mixture of austenite and ferrite phases. As a result, Duplex S31803 Sheets display properties characteristic of both austenitic and ferritic stainless steels. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades.

Duplex S31803 Sheets are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.

Duplex S31803 Sheets are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, Duplex S31803 Sheets exhibit very high resistance to stress corrosion cracking. The super duplex grades are even more resistant to corrosion.

The high chromium content of Duplex S31803 Sheets that protects against corrosion, causes embrittlement at temperatures over about 300°C. At low temperatures Duplex S31803 Sheets have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.

Fabrication of all stainless steels 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.

Although Machin able, the high strengths of Duplex S31803 Sheets 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.

Duplex S31803 Sheets 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.

Duplex S31803 Sheets have good weld ability. 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.

Additional Information:

• Delivery Time: Dispatch within 2 days

Deriving the Duplex name from the presence of both Austenite and Ferrite in similar proportions, Duplex S32205 Plates combine excellent corrosion resistance with high strength. The typical mechanical properties would be double that of a single phase austenitic grade such as 316, while, for example, offering superior stress corrosion cracking resistance in chloride solutions.

Duplex S32205 Plates are extremely corrosion resistant, work hard enable alloys. Their microstructures consist of a mixture of austenite and ferrite phases. As a result, Duplex S32205 Plates display properties characteristic of both austenitic and ferritic stainless steels. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades.

Duplex S32205 Plates are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.

Duplex S32205 Plates are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, Duplex S32205 Plates exhibit very high resistance to stress corrosion cracking. The super duplex grades are even more resistant to corrosion.

The high chromium content of Duplex S32205 Plates that protects against corrosion, causes embrittlement at temperatures over about 300°C. At low temperatures Duplex S32205 Plates have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.

Fabrication of all stainless steels 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.

Although Machin able, the high strengths of Duplex S32205 Plates 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.

Duplex S32205 Plates 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.

Duplex S32205 Plates have good weld ability. 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.

Additional Information:

• Delivery Time: Dispatch within 2 days