Name: ASTM A789 UNS S32205 Duplex Steel Tube 450MPa Yield Cl⁻ Resistant for Heat Exchanger
Brand: Yuhong Group Co.,Ltd
SKU: ASTM A789 UMS S32205
Price: 120000 USD
Availability: InStock

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ASTM A789 UNS S32205 Duplex Steel Tube 450MPa Yield Cl⁻ Resistant for Heat Exchanger

Product Details:

Place of Origin:	China
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015
Model Number:	ASTM A789 UMS S32205

Payment & Shipping Terms:

Minimum Order Quantity:	500KGS
Price:	NEGOTIABLE
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Delivery Time:	10-90 Days
Payment Terms:	L/C,T/T
Supply Ability:	According To Client's Request

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Detailed Product Description

Standard:	ASTM A789	Grade:	UNS S32205
Material:	Duplex Stainless Steel	Outside Diameter:	1/8"-48"
Wall Thickness:	SCH5S To SCHXXS	Types:	Seamless
End:	BE/PE	Length:	6m, 12m, Or As Required

ASTM A789 UNS S32205 Duplex Steel Tube 450MPa Yield Cl⁻ Resistant for Heat Exchanger

ASTM A789 / ASME SA789 are standard specifications for seamless and weldable ferritic/austenitic duplex stainless steel tubes, suitable for heat exchangers, condensers, and general corrosive applications. UNS S32205 is the most widely used grade of duplex stainless steel, characterized by its unique two-phase microstructure, with approximately 50% ferrite and 50% austenite, combining the good toughness of austenitic stainless steel with the high strength and stress corrosion resistance of ferritic stainless steel.

ASTM A789 and UNS S32205 duplex stainless steel tubes are "mainstay" duplex stainless steel tubing solutions designed for chloride-containing environments, acidic media, and high-strength applications. They have approximately twice the yield strength of 316L, significantly better pitting resistance than austenitic stainless steel, and are inherently immune to chloride stress corrosion cracking.

Duplex stainless steel UNS32205 is the top choice for cost-effectiveness in high-sulfur, chlorine-containing corrosion-prone areas.

It is suitable for high-pressure air-cooled tubing in hydrogenation processes, air-cooling of pre-hydrogenated products, and acidic condensation lines containing NH₄HS.

Chemical Composition – UNS S32205 vs UNS S31803
Element	S32205 Range (%)	S31803 Range (%)
C (Carbon)	≤ 0.03	≤ 0.03
Mn (Manganese)	≤ 2.00	≤ 2.00
Si (Silicon)	≤ 1.00	≤ 1.00
P (Phosphorus)	≤ 0.03	≤ 0.03
S (Sulfur)	≤ 0.02	≤ 0.02
Cr (Chromium)	22.0 – 23.0	21.0 – 23.0
Ni (Nickel)	4.5 – 6.5	4.5 – 6.5
Mo (Molybdenum)	3.0 – 3.5	2.5 – 3.5
N (Nitrogen)	0.14 – 0.20	0.08 – 0.20
Cu (Copper)	—	≤ 1.0 (optional)

Mechanical Properties – Standard Minimum vs. Typical Values
Property	ASTM A789 Requirement (Min.)	Typical Value
Tensile Strength (Rm)	≥ 655 MPa (95 ksi)	825 – 1035 MPa
Yield Strength (Rp0.2)	≥ 450 MPa (65 ksi)	~550 – 620 MPa
Elongation (50mm gage length)	≥ 25%	30 – 35%
Hardness	≤ 293 HBW / ≤ 32 HRC	~19 HRC

Physical Properties
Property	Value	Unit
Density	7.82 – 7.85	g/cm³
Elastic Modulus (20°C)	190 – 200	GPa
Thermal Conductivity (100°C)	~19	W/(m·K)
Coefficient of Linear Expansion (0-100°C)	13.7	×10⁻⁶/°C
Electrical Resistivity	~850	nΩ·m
Melting Range	1400 – 1455	°C

Heat Treatment Requirements
Item	Requirement
Solution Annealing Temperature	1020°C – 1100°C
Cooling Method	Rapid cooling (water quench or rapid air cool)
Hardening Method	Cannot be hardened by heat treatment
Work Hardening	Cold working produces significant hardening

Application

Oil and Gas Industry: Oil and gas extraction and transportation equipment, offshore platform pipelines, pipelines for acidic environments
Chemical Processing: Chemical processing equipment, transportation and storage containers
Marine Engineering: Seawater cooling systems, pipelines for high-chlorine environments
Paper Industry: Pulp digesters, filtrate tanks, paper machine components
Heat Exchangers: Heat exchanger tube bundles for oil refining, chemical, and power industries

ASTM A789 UNS S32205 Duplex Steel Tube 450MPa Yield Cl⁻ Resistant for Heat Exchanger 0