ASME SA789 S32205 Duplex Stainless Steel Seamless Tube

GNEE provides high-quality ASME SA789 S32205 duplex stainless steel seamless pipes. This material, optimized through nitrogen alloying, features a dual-phase structure of austenite and ferrite (approximately 50% ferrite + 50% austenite). Suitable for demanding applications such as chemical, oil and gas, desalination, papermaking, and HVAC, GNEE supports cold drawing and cold rolling processes. Surface treatments include bright finish (BA), pickling (No. 1), or mechanical polishing (No. 2B/No. 4). GNEE offers smooth interiors and high dimensional accuracy. Further processing services, such as cutting and straightening, are also available, ensuring global customers receive reliable and long-lasting piping system solutions in corrosive and high-pressure environments.

 

We offer a wide range of sizes of ASTM A789 UNS S31803 Duplex Steel Pipe, ASTM A789 UNS S32205 Duplex Steel Pipe, ASTM A789 2205 Duplex Steel Pipe, ASTM A789 UNS S32750 Duplex Steel Pipe, ASME SA789 S32520 Duplex Steel Pipe, S31803 Duplex Stainless Steel Pipe, S32205 Duplex Stainless Steel Pipe, ASME SA789 UNS S32760 Duplex Stainless Steel Pipe, and Super Duplex Stainless Steel Pipe 2507. We offer both welded and seamless stainless steel pipe. Duplex steel offers high strength and excellent corrosion resistance, making it suitable for harsh environments.Email: sales@gneestainless.com

 

ASTM A789 Duplex Stainless Steel Tubing Specifications

Type	Seamless Tubing
Specification	ASTM A789, ASME SA789
Grades	UNS S31803, S32750, S32760
Outside Diameter	6 – 610 mm
Wall Thickness	0.5 – 30 mm, Average Wall Or Minimum Wall
Length	Specific or Rando, standard 6000 mm length
Condition	Annealing Pickling, Beight Annealing
Form:	Round, Coiled Tubing
Application	Heat Exchanger, Boiler, Water, High Pressure, Ornamental Purpose
Manufacturing Method	Cold Rolling, Cold Drawn

 

Chemical Composition

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
2205 (UNS S31803)	Min Max	– 0.030	– 2.00	1.00	0.030	0.020	21.0-23.0	2.5-3.5	4.5-6.5	0.08-0.20
2205 (UNS S32205)	Min Max	– 0.030	2.00	1.00	0.030	0.020	22.0-23.0	3.0-3.5	4.5-6.5	0.14-0.20

 

Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell C (HR C)	Brinell (HB)
UNS S31803	621	448	25	31 max	293 max
UNS S32205	621	448	25	31 max	293 max

 

Physical Properties

Grade 2205	Density (kg/m3)	Elastic Modulus(GPa)	Mean Co-eff of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C( J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
UNS S32205 / UNS S31803	782	190	13.7	14.2	–	19	–	418	850

 

Testing and Inspection
Compliant with ASTM A789, various tests and inspections are performed, including thermal analysis, tensile testing, hardness testing, hydrostatic testing, magnetic particle inspection, liquid penetrant testing, macroetch testing, and Charpy impact testing.

 

All stainless steel pipes are moisture-proofed and securely packaged in wooden crates, pallets, or bubble wrap. They are transported in standard containers or dedicated vehicles to ensure the integrity and safety of the goods during transit. We offer global shipping, with a typical lead time of 7-15 days from production to delivery, ensuring on-time delivery to our customers.