Duplex Steel Pipes, Tubes & Bars

• ASTM / ASME SA 240 UNS NO S31803, S32205, S32550, S32750, S32760

• Sturdiness
• Robustness
• High-grade steel

2205 Duplex Stainless Steel Pipe, is a two phase ferritic, austenitic 22% chromium, 3% molybdenum, 5-6% nickel alloyed stainless steel. 2205 duplex pipe is the most widely used duplex stainless steel grade & it is characterized by high strength, double that of the standard austenitc stainless steel grades. 2205 stainless steel pipe, exhibits excellent corrosion resistance, which is much higher than that of stainless steel 316 grade. S31803 pipe shows good formability in a variety of fabrications. Most uns s31803 pipe producers recommend a maximum hot forming temperature between 2010 & 2100°F. duplex uns s31803 pipe are apt replacements to austenitic grades, especially in premature failure environments & marine environments.

Some of the applications for duplex s31803 pipes are listed below;
Transport, storage & chemical processing
Oil & gas exploration
High chloride & marine environments
Paper & pulp machineries, liquor tanks etc.

Duplex 2505 Equivalent Grade

Duplex 2505 Chemical Composition
Carbon; 0.030max
Manganese; 2.00max
Silicon; 1.00max
Phosphorus; 0.030max
Sulfur; 0.020max
Chromium; 21.0-23.0
Molybdenum; 2.5-3.5
Nickel; 4.5-6.5
Nitrogen; 0.08-0.20

Duplex 2505 Mechanical Properties
Tensile Strength(Mpa)min; 621
0.2% Yield Strength(Mpa)min; 448
Elongation(% in 50mm)min; 25
Hardness Brinell(HB); 293max
Hardness Rockwell C(HR C); 31max

• Value Added Services
• Epoxy & FBE Coating
• Electro Polish
• Draw & Expansion
• Bending Buffin

Details:

• Schedule: In Various SWG & BWG  
• Type : Seamless / ERW / Welded / Fabricated / CDW
• Form : Round
• Length : Single Random, Double Random & Required Length.
• End : Plain End, Beveled End, Treaded.

S32760 chemical composition
Chromium; 24.0-26.0
Nickel; 6.0-8.0
Molybdenum; 3.0-4.0
Carbon; 0.030max
Tungsten; 0.5-1.0
Copper; 0.50-1.0
Nitrogen; 0.2-0.3
Manganese; 1.00max
Silicon; 1.0max
Phosphorus; 0.03max
Sulfur; 0.01max
Iron; Bal

S32760 Pipe Mechanical Properties
Tensile Strength; 800Mpa
Yield Strength; 550Mpa
Hardness Brinell; 270max

• Corrosion resistant
• Very long lasting
• High Performance

DUPLEX 2205

ASTM A182, ASTM A240, ASTM A276, ASTM A789, ASTM A790, ASTM A815
UNS S31803, UNS S32205
NACE MR0175

Forms of Duplex 2205 Pipe And Tubes

2205 Duplex Overview

Duplex 2205 is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels. "Duplex" describes a family of stainless steels that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless. The structure of 2205 duplex stainless steel consists of austenite pools surrounded by a continuous ferrite phase. In the annealed condition, 2205 contains approximately 40-50% ferrite. Often referred to as the work horse grade, 2205 is the most widely used grade in the duplex family of stainless steels.

The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy (stress corrosion cracking resistance and high strength) with those of an austenitic alloy (ease of fabrication and corrosion resistance).

Usage of 2205 Duplex stainless steel should be limited to temperatures below 600 Degree F. Extended elevated temperature exposure can embrittle 2205 stainless.

Duplex Steel Corrosion Resistance

2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.

The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.

Duplex Steel Chemical Composition, %

Duplex Steel Mechanical Properties
Specified Tensile Properties ASTM A240

• Corrosion resistance
• Stability
• Longer sustainability