2205 Tubing

1. Standard: ASTM A790 / ASME SA790、ASTM A928 / ASME SA928
2. Size: 5.0 - 1219.2 mm
3. Thickness : 0.5 - 20mm
4. Length: Single, Double Random & Cut Length

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Product Introduction

S32205 (UNS S31803) is a second-generation duplex stainless steel. "Duplex" refers to its microstructure consisting primarily of two phases: austenite (gamma phase) and ferrite (alpha phase). Ideally, the ratio of these two phases is approximately 50/50. HT PIPE is a asme sa789 s32205 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

2205 Stainless Tube Specifications

Specifications	ASTM A789 / ASME SA 789
Standard	DIN, JIS, ASTM, EN, GB, AISI, ASME
Thickness	0.3mm - 50 mm
Seamless Tube Size	3.35 mm OD To 101.6 mm OD, 15 NB to 150 NB IN
Welded Tube Size	6.35 mm OD To 152 mm OD
Tube End	Plain End, Beveled End, Treaded Pipe.
Grade	TP304,TP304L,TP316,TP316L,316Ti TP317,TP317L,TP321,TP310S,TP347,S31254,N08367,N08926,N08904, S31803, S32205, S32750

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2205 Stainless Steel Pipe Chemical Properties

	C	Si	Mn	P	S	Cr	Ni	Mo	Cu	N	PREN	Fe
Min	•	•	•	•	•	24	4.5	2.9	1.5	0.1	40	0
Max	0.04	1	1.5	0.04	0.03	27	6.5	3.9	2.5	0.25	•	0

Stainless steel s32205 pipe High Mechanical Strength

Its yield strength (≥450 MPa) is more than double that of standard austenitic stainless steels (such as 316L, which has a ~200 MPa). This means that for the same pressure, thinner pipe walls can be designed, reducing equipment weight and material costs (although the cost per unit weight is higher, the overall cost may be lower). It also offers superior resistance to fatigue and stress corrosion cracking.

2205 tubing Corrosion Resistance

Resistance to Pitting and Crevice Corrosion (PREN Value): The pitting corrosion resistance equivalent (PREN) formula is: PREN = %Cr + 3.3 × %Mo + 16 × %N. S32205's PREN value typically exceeds 35 (generally between 35 and 40), significantly higher than 316L (~25) and superior to 904L (~33). This allows it to easily withstand harsh environments such as seawater, chloride solutions, and chemical process media.

Resistance to Stress Corrosion Cracking (SCC): Austenitic stainless steels (such as 304 and 316) are highly susceptible to SCC in tensile stress environments containing chloride ions. However, S32205's duplex structure provides inherent immunity to SCC, a key factor in its widespread use in the oil and gas industry.

Uniform Corrosion Resistance: It exhibits excellent corrosion resistance to a variety of organic and inorganic acids (especially phosphoric and sulfuric acids), alkalis, and saline solutions.

ss2205 welded tube Weldability

S32205 exhibits excellent weldability when appropriate welding procedures and filler materials (typically higher alloying consumables such as ER2209) are used. The welded joint maintains sufficient toughness and corrosion resistance. However, care must be taken to control heat input and interpass temperature to maintain the ideal duplex ratio and avoid the precipitation of detrimental phases.

s32205 seamless pipe High Toughness

Although not possessing the extremely low impact transition temperature of austenitic stainless steels, S32205 maintains good toughness and ductility at typical application temperatures (down to -50°C), sufficient for most industrial applications.

Application of uns s32205 pipe

Oil and gas: submarine pipelines, downhole tools for acid gas wells.

Chemical equipment: sulfuric acid reactors, phosphoric acid evaporators, pickling equipment.

Nuclear industry: containers and pipelines for nuclear waste treatment systems.

Marine engineering: seawater desalination devices, heat exchangers.

Environmental protection: key components of flue gas desulfurization (FGD) systems.

astm s32205 pipe Processing

Cutting: Plasma cutting, water jet cutting, or abrasive cutting can be used. Oxyacetylene flame cutting should be avoided.
Cold Working: Due to its high strength and high work hardening rate, higher forces are required and tool wear is increased.
Hot Working: Prolonged operation within the "sensitive temperature range" of 570-950°C should be avoided to prevent the precipitation of brittle intermetallic phases such as sigma and chi phases, which can severely impair toughness and corrosion resistance.
Welding: Duplex steel special welding consumables (such as ER2209) must be used, and the heat input and interpass temperature must be strictly controlled (usually recommended to be below 150°C). Heat treatment is usually not required after welding unless the shape is complex or the thickness is very large.