Duplex Round Steel Pipe are called "duplex" because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. They have significantly better toughness and ductility than ferritic grades; about twice as strong as regular austenitic or ferritic stainless steels ,a range of corrosion resistance, similar to the range for austenitic stainless steels and show very good stress corrosion cracking.
Alloy 2205 provides pitting and crevice corrosion resistance superior to 316L or317L austenitic stainless steel tube in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic.
Standard: ASTM/ASME A789/SA789, A790/SA790Steel Grade: UNS S32750, S31803, S32760 etc.
Applications:General service, fluid transportation, pressure, high and low temperature, structural, heat exchanger, oil and gas service, ornamental, chemical and fertile
Duplex Round Steel Pipe 2205 has below capability:High intensity and good impact toughnessIt can bear stress corrosion wellGood ability to avoid patch and crackLow heat expand modulus and better heat transmitHigh pressure work Weldable
Delivery requirment:
Marking: GANYEAH, material grade, standard, specification, heat no.Surface Treatment: Bright annealed, polished outside and inside
surface.Package: Each pipe in a PVC bag and caps on both ends then bundled in wood case, (option: Bundle with knitted plastic bag/stee crate. )
Mill test certificate: according to EN 10204 3.2Inspection: Third party inspection, or by clints
Character | General Code | UNS Code | ASTM | Application |
Duplex Stainless Steel Pipe | 2205 | S31803 | A789,A790 | Oil, chemical, equipment, heat exchanger, pressure equipment |
2507 | S32750 | A789,A790 | Oil, chemical, sea, Machinery |
