Name: ASTM A790 S32205 Duplex Stainless Steel Seamless Pipe High Strength & Corrosion Resistant Tube
Brand: Yuhong Group Co.,Ltd
SKU: ASTM A790 S32205
Price: 120000.00 USD
Availability: InStock

Yuhong Holding Group Co.,LTD

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ASTM A790 S32205 Duplex Stainless Steel Seamless Pipe High Strength & Corrosion Resistant Tube

Product Details:

Place of Origin:	China
Brand Name:	YUHONG
Certification:	ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST 9941-81, CCS, ISO 9001-2008
Model Number:	ASTM A790 S32205

Payment & Shipping Terms:

Minimum Order Quantity:	500KGS
Price:	Negotiable
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Delivery Time:	10-50 Days
Payment Terms:	T/T,L/C
Supply Ability:	1500 tons per month

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Detailed Product Description

Highlight:

ASTM A790 S32205 duplex pipe

high strength stainless steel tube

corrosion resistant seamless steel pipe

ASTM A790 S32205 Duplex Stainless Steel Seamless Pipe

High-performance ferritic-austenitic duplex stainless steel pipe renowned for exceptional strength and superior corrosion resistance.

Introduction and Standard Specifications

The ASTM A790 S32205 Seamless Pipe is a high-performance ferritic-austenitic duplex stainless steel pipe, governed by the ASTM A790/A790M-24 standard. This product is specifically designed for general corrosive service with emphasis on resistance to stress corrosion cracking (SCC).

This specification covers both seamless and straight-seam welded pipes made from duplex stainless steel grades. The seamless variant, manufactured through hot or cold rolling processes, is known for its structural homogeneity and reliability under high pressure. The S32205 grade, commercially known as 2205 duplex stainless steel, offers an optimal balance of properties and cost.

Key Governing Standards

Primary Specification: ASTM A790/A790M-24 (Current Edition)
Related Material Standards: ASTM A182, ASTM A276
International Equivalents: UNS S32205, EN 1.4462, and closely related to S31803

Material and Key Characteristics

S32205 duplex stainless steel features a microstructure consisting of approximately 50/50 mixture of ferrite and austenite phases. This dual-phase structure combines the best attributes of both:

From Ferritic Stainless Steel: High strength and excellent resistance to stress corrosion cracking
From Austenitic Stainless Steel: Good toughness and ease of fabrication

This synergy results in a material that offers nearly double the yield strength of standard 300-series austenitic stainless steels while maintaining excellent corrosion resistance, especially in chloride-containing environments. Its high strength often allows for thinner wall designs, contributing to weight and cost savings in piping systems.

Heat Treatment: To achieve and maintain this balanced microstructure, the pipe undergoes mandatory solution annealing heat treatment at 1020-1100°C (1870-2010°F), followed by rapid water cooling. This process ensures dissolution of detrimental phases and homogenizes the structure.

Chemical Composition and Mechanical Properties

The outstanding performance of S32205 is a direct result of its carefully balanced chemical composition, rigorously defined by the ASTM A790 standard.

Chemical Composition (Weight %)

Element	Minimum (%)	Maximum (%)	Primary Function
Carbon (C)	-	0.030	Kept low to prevent sensitization and improve weldability
Chromium (Cr)	22.0	23.0	Provides basic corrosion and oxidation resistance
Nickel (Ni)	4.5	6.5	Stabilizes the austenite phase and improves toughness
Molybdenum (Mo)	3.0	3.5	Enhances resistance to pitting and crevice corrosion
Nitrogen (N)	0.14	0.20	A crucial additive that significantly boosts strength and pitting resistance
Manganese (Mn)	-	2.00	Austenite former and contributes to strength
Silicon (Si)	-	1.00	Deoxidizer during steelmaking
Phosphorus (P)	-	0.030	Impurity element, kept low for toughness
Sulfur (S)	-	0.020	Impurity element, kept low for weldability and surface finish

Mechanical Properties

Property	Standard Requirement	Typical Value / Note
Tensile Strength (Rm)	≥ 621 MPa (≥ 90 ksi)	Often exceeds minimum substantially
Yield Strength (0.2% Rp)	≥ 448 MPa (≥ 65 ksi)	Approximately twice that of Type 316L
Elongation (A)	≥ 25%	Demonstrates good ductility
Hardness (HBW)	≤ 290	Maximum Brinell hardness limit

Product Application Scenarios

Due to its robust combination of strength and corrosion resistance, ASTM A790 S32205 seamless pipe is a preferred material in demanding industrial sectors:

Oil & Gas Industry: Ideal for subsea pipelines, downhole tubing, process piping in refineries, and gas treatment plants where resistance to sour service (H₂S) and chloride stress corrosion is paramount
Chemical & Petrochemical Processing: Used in reactors, heat exchangers, and transfer lines handling aggressive acids, alkalis, and solvents
Seawater & Desalination Systems: Excellent resistance to pitting from chlorides makes it suitable for seawater intake and discharge lines, heat exchanger tubes, and reverse osmosis piping
Pulp & Paper Industry: Withstands corrosive environments in digester and bleach plant areas
Energy & Environmental Engineering: Applied in flue gas desulfurization (FGD) systems, wastewater treatment plants, and other environmental protection equipment