Duplex steel tubes&pipes 2205

Duplex stainless steel tube 2205

2205 Duplex Stainless Steel tubes&pipes, 2205 Duplex Stainless Steel Industrial tubes&pipes, 2205 Duplex Stainless Steel Industrial Welded tubes&pipes, 2205 Duplex Stainless Steel seamless Pipes &tubes Supplier, 2205 Duplex Stainless Steel seamless tubes&pipes,2205 Duplex stainless tubes&pipes,2205 Duplex Stainless Steel capillary,2205 Duplex Stainless steel BA sanitary pipes,2205 Duplex Stainless steel precision pipes

Type of steel

Grade 2205 , UNS S32205 , EN1.4410 , DIN X2CrNiMoN2574 , SS 2328

Duplex stainless steel usage has increased drastically as shown in Figure 1. All industries, including pulp and paper, have increased their demand for duplex stainless steels. This significant growth is due to a combination of market growth combined with change in material selection. In 2017, the total duplex usage globally reached about 260,0000 metric tons.Although this is a fast growth rate, it is still only about 5% of the total stainless usage. There is room for duplex stainless steels to grow.

2205 Duplex

2205 duplex is the most available duplex stainless steel around the globe. 2205 is particularly cost competitive, in part due to the many global mills and stockists. It is produced in nearly every product form, most of which are available from inventory. This availability has made 2205 a viable option for large and small projects as well as repair and replacement of equipment. Most new products in any industry need tocreate a demand in order to ramp up production and increase availability. Newalloys can struggle to gain traction because mills are not willing to produce large volumes of material without firm orders. Similarly, stocking suppliers are hesitant to invest in a stocking program without a customer base. On the other side of the story, users are not willing to specify an alloy that is not readily available. 2205 has overcome this hurdle in recent years and is verging on joining the commodity classification along with 304L and 316L, which have been the leaders in the stainless realm for many years. This process has taken a long time and was pushed forward by the fact that 2205 is not under patent and is often viewed as a commodity. This motivates any stainless supplier to produce and stock the grade with a high confidence level that it can, and will, be widely consumed.

2205 Duplex All duplex stainless steels resist the Achilles heel of the 300 series - chloride stress corrosion cracking. The original duplex alloy Type 329 offered useful corrosion resistance and high strength while using less nickel. Modern day duplex alloys, like 2205, further optimized performance and ease of fabrication. Duplex alloys overall offer good general corrosion resistance and higher strength with the benefit of a cost saving. We know today that 2205 has approximately double the strength of 300 series stainless and is similar to 317L in regards to general corrosion. Due to the cost competitive supply of 2205, it has replaced 304L, 316L, 317L and even carbon steel for many applications. The higher strength allows for weight savings to counteract any cost increase. The improved corrosion resistance lengthens the overall life expectancy. The strength and corrosion benefits have made 2205 a competitor to many different austenitic stainless steels.

Table 1 Chemical Compositions of Duplex stainless steels 2205

Table 2—ASME ad ASTM Specifications for DSS

Table 3—Mechanical Properties of Various Duplex 2205

Normative References

ASME Boiler and Pressure Vessel Code (BPVC) 1, Section VIII : Pressure Vessels; Division 1, Division 2

ASME SA-182,Specification for Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

ASME SA-240, Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels

ASME SA-351, Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts

ASME SA-479, Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels

ASME SA-789, Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

ASME SA-790, Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe

ASME SA-815, Specification for Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings

ASTM A276 2, Standard Specification for Stainless Steel Bars and Shapes

ASTM A890, Standard Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application

ASTM A923, Standard Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels

ASTM A928, Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal

ASTM A995, Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts

ASTM E140, Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness

ASTM E562, Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count

ASTM G48, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution

Tube Inspection of TINSI-STEEL Duplex stainless steel tubes&pipes

PMI test

Dimension & Visual Examination

Surface Roughness Test

Tensile Test

Flaring Test

Flattening Test

Metallographic Inspection

Hardness Tests(general choose one among)

Brinell Hardness Test.

Vickers Diamond Hardness Test.

Rockwell Hardness Test.

Non-destructive Tests (general choose one among)

Hydrostatic Testing.

Ultrasonic Testing

Eddy-Current Testing