All You Need To Know About Duplex Steel S32205 Pipes & Tubes

By Author: Niket
Total Articles: 47
Comment this article

Known for its dual-phase microstructure—consisting of both austenite and ferrite—Duplex Steel S32205 Pipes & Tubes offer a unique combination of mechanical strength and corrosion resistance, making them ideal for demanding environments.

In this blog, we’ll dive deep into the features, benefits, and applications of Duplex S32205 Pipes & Tubes.

What is Duplex Steel S32205?
Duplex Stainless Steel S32205, also referred to as UNS S32205 or Alloy 2205, is a nitrogen-enhanced duplex grade designed to combat common corrosion issues found in harsh environments. Its microstructure is approximately 50% ferrite and 50% austenite, which results in a material that is significantly stronger than regular austenitic or ferritic stainless steels.

This duplex structure gives S32205 excellent resistance to:

Stress corrosion cracking

Pitting and crevice corrosion

General corrosion in chloride-bearing environments

Chemical Composition of S32205
Element Content (%)
Chromium (Cr) 21.0 – 23.0
Nickel (Ni) 4.5 – 6.5
Molybdenum (Mo) 2.5 – 3.5
Manganese ...
... (Mn) ≤ 2.0
Nitrogen (N) 0.14 – 0.20
Carbon (C) ≤ 0.030
Phosphorus (P) ≤ 0.030
Sulfur (S) ≤ 0.020
Iron (Fe) Balance

Mechanical Properties
Property Value
Tensile Strength ≥ 620 MPa
Yield Strength (0.2% Proof) ≥ 450 MPa
Elongation ≥ 25%
Hardness (Brinell) ≤ 290 HB
Impact Toughness Excellent, even at sub-zero temperatures

Key Features & Advantages
High Strength
Duplex S32205 is nearly twice as strong as regular austenitic stainless steels like 304 or 316.

Excellent Corrosion Resistance
It offers superior resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments.

Good Weldability
S32205 is weldable using most standard methods with minimal risk of hot cracking.

Superior Fatigue Strength
Ideal for environments involving cyclic loading or pressure changes.

Cost-Effective
Due to its higher strength, thinner sections of S32205 can be used without compromising performance—resulting in cost savings.

https://www.nehametalalloys.com/duplex-steel-s32205-seamless-welded-pipes-tubes-manufacturer-exporter.html