AISI 2205 UNS S31803 1.4462 DSS Duplex Stainless Steel Seamless Round Pipe Tube

Group Stainless Steel Tube
Min. Order 1 metric ton
Terms of Payment L/C, T/T
Update Time 2020-04-01
Item specifics
Outside diameter range10-300mm
Delivery conditionHarden
Surface conditionAcid pickling / polished
Duplex stainless steels are a family of stainless steels. These are called duplex (or austenitic-ferritic) grades because their metallurgical structure consists of two phases, austenite (face-centered cubic lattice) and ferrite (body centered cubic lattice) in roughly equal proportions. They are used for their good mechanical properties in the as-cast (and therefore as-welded condition) and/or their excellent corrosion resistance properties (particularly to stress corrosion cracking).
Product Details
OD range: 6-219mm(0.2-8.6 inch)
WT range:0.5-25mm(0.02-1 inch)
Length range:1-12 meter(3-40 foot)
Tolerance on hot rolled condition: OD+/-1%, WT+/-10%
Tolerance on cold drawn/rolled condition: OD +/-0.5%, WT+/- 0.15mm
Delivery condition: Harden/Annealed
Surface condition: Acid pickling / polished
Property Information
Grade 2205 is typically used in the construction of heat exchangers, pressure vessels, tanks, tubes and pipes for the following industry areas:
* Chemical processing, transport and storage.
* Oil and gas exploration and processing equipment.
* Marine and other high chloride environments.
* Pulp and paper digesters, liquor tanks and paper machines.
Combining many of the beneficial properties of both ferritic and austenitic steels, 2205 is the most widely used duplex stainless steel grade. Its high chromium and molybdenum content gives the stainless steel excellent corrosion resistance. The microstructure provides resistance to stress corrosion cracking and ensures high strength.
The grade is generally not suitable for use at temperatures above 300oC or below -50oC because of reduced toughness outside this range. You are most likely to encounter 2205 stainless steel being used in industrial environments such as petrochemical, chemical, oil, gas and paper plants.

Alternative Grades
2205 has been available for several years - in general this complies with UNS grade designation S31803. More recently, product has become available complying with the higher corrosion resistant composition UNS S32205, as in table 1. Both these alternatives are known as 2205.

Grade 2205 has a micro structure of roughly equal amounts of ferrite and austenite, hence the 'duplex' description. The duplex structure of 2205 has the following properties:
* High strength.
* Lower thermal expansion co-effecient than austenitic steels but greater than carbon steels.
* High resistance to corrosion, particularly stress corrosion cracking, corrosion fatigue and erosion.

The high content of chromium and molybdenum and the addition of nitrogen gives the steel further beneficial characteristics:
* High general corrosion resistance.
* High pitting and crevice corrosion resistance.
* Good sulphide stress corrosion cracking resistance.
Tube ends
The tubes come with square cut and deburred ends or beveled end with plastic caps.
The product is supplied with 3.1.B inspection certificate, according to the standards EN 10204 and ISO 10474.
Identification and Marking
Steel Pipe are marked in indelible ink, the details being repeated along the entire length of each tube and on a label, as follows:
Manufacturer’s trademark – manufacturing standard – dimensions -steel grade – supply condition – cast no. – item number.
Produce Process
Seamless Steel Pipe Process: Round bar→punched→grinded surface→annealed→grinded surface→acid pickling→cold rolled→annealed→Acid pickling or polished→cutting length→package
Inspection and Test
Chemical, Tensile test, intergranular corrosion, flat test, expand test, nonmetallic inclusion, hydraulic test. 
Tubes will bundled by steel strip and not exceed 3 tons each batch. If thin wall thickness, we will put it into wooden case.