Name | Stainless Steel Seamless Pipe/Tube |
Available Size | Austenitic steel:O.D.: 6mm – 630mm / DN 6 – 600 / NPS 1/8''- 24'' W.T.: 0.9mm – 40mm Sch 5S – Sch XXS Duplex/Super Duplex/Nickel Alloy steel: OD:6mm--273mm THK:1mm--20mm Butt-welding Elbow/Tee/Reducer/Cap:3/8"--48" THK:SCH 5---SCH 160 Length: ≤ 24000 mm |
Austenitic/ Super Austenitic Steel | 304, 304L, 304H, 316, 316L, 316Ti, 316H, 321H, 309S, 309H, 310S, 310H, 347H, S31254, 904L, TPXM-19 |
Duplex/Super Duplex Steel | S31803(SAF2205), S32750(SAF2507), S32760 |
Alloys | Alloy20 ,Alloy28,Alloy200,Monel400,MonelK500, Inconel625,Inconel718,Inconel790,Incoloy800, Incoloy825,Incoloy925,Incoloy926, HastelloyC-22, Hastelloy C-276, hastelloy B2, HastelloyG3,17-4PH |
Special Metarial | Custom produced per your requirements. |
Specification | ASTM/ASME A312, A269, A213, A511, A789, A790 ASTM SB163, SB165, SB167, SB407, SB423, SB444 EN10216-5 TC1, TC2, DIN 17456, DIN17458 JIS G3459, G3463, GOST 9940, GOST 9941 |
Quality Control | ISO 9001:2000, Pressure Equipment Directive 97/23/ EC & AD2000-W0, RTN, GOST, IQNET |
Classification Society Approvals | BV, DNV, LR,GL,ABS, NK, KR, CCS. |
Applications | petroleum, chemical industry, chemical fiber, papermaking,heat preservation and refrigeration, electricity, water conservancy,architecture, environmental protection and boilerheat exchanger. |
Grade | C max | Si max | Mn max | S max | Pmax | Cr | Ni | Mo |
S31803 | 0.03 | 1.00 | 2.00 | 0.02 | 0.03 | 21-23 | 4.5-6.5 | 2.5-3.5 |
S32205 | 0.03 | 1.00 | 2.00 | 0.02 | 0.03 | 22-23 | 4.5-6.5 | 3.0-3.5 |
S32750 | 0.03 | 0.08 | 1.20 | 0.02 | 0.035 | 24-26 | 6.0-8.0 | 3.0-5.0 |
S32760 | 0.05 | 1.00 | 1.00 | 0.01 | 0.030 | 24-26 | 6.0-8.0 | 3.0-4.0 |
Duplex 2205 stainless steel pipe
ASTM A 789, A 790,UNS S31803, S32205
Duplex steel 2205 /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° F. Extended elevated temperature exposure can embrittle 2205 stainless.
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.
Chemical Composition, %
Cr
Ni
Mo
C
N
Mn
Si
P
S
Fe
22.0-23.0 | 4.50-6.50 | 3.00-3.50 | .030 Max | 0.14-0.20 |
2.00 Max | 1.00 Max | .030 Max | .020 Max | Balance |
What are the characteristics of Duplex 2205?
High resistance to chloride stress corrosion cracking
Resistance to chloride pitting and crevice corrosion
Good general corrosion resistance
Good sulfide stress corrosion resistance
High Strength
Good weldability and workability
Chemical process vessels, piping and heat exchangers
Pulp mill digesters, bleach washers, chip pre-steaming vessels
Food processing equipment
Oil field piping and heat exchangers
Flue gas desulfurization equipment
In what applications is Duplex 2205 used?
ASTM Specifications
Pipe Smls
Pipe Welded
Tube Smls
Tube Welded
Sheet/Plate
Bar
Flanges, Fittings & Valves
A790 | A790 | A789 | A789 | A240 | A276 | A182 |
