Chemical Composition Element Specified / Typical Range (wt. %) C ≤0.030 Mn ≤2.00 Si ≤1.00 P ≤0.030 S ≤0.020 Cr 21.0–23.0 Ni 4.5–6.5 Mo 2.5–3.5 N 0.08–0.20 Fe Balance

Mechanical Properties Property Minimum / Requirement Tensile Strength, min. 620 MPa Yield Strength, 0.2%, min. 450 MPa Elongation, min. 25% Hardness As required by the applicable fitting specification

Chemical and petrochemical process piping Oil and gas transmission and production systems Power generation and utility piping Food, beverage and pharmaceutical systems Water treatment and desalination Marine and offshore piping

Chemical Composition Element Specified / Typical Range (wt. %) C ≤0.030 Mn ≤2.00 Si ≤1.00 P ≤0.030 S ≤0.020 Cr 21.0–23.0 Ni 4.5–6.5 Mo 2.5–3.5 N 0.08–0.20 Fe Balance

Mechanical Properties Property Minimum / Requirement Tensile Strength, min. 620 MPa Yield Strength, 0.2%, min. 450 MPa Elongation, min. 25% Hardness As required by the applicable fitting specification

Chemical and petrochemical process piping Oil and gas transmission and production systems Power generation and utility piping Food, beverage and pharmaceutical systems Water treatment and desalination Marine and offshore piping

2205 Duplex Stainless Steel Elbow

Grade: 2205/S32205 /S31803

Elbow types:

90° Long Radius, 90° Short Radius, 45° Elbow, 180° Return, 3D / 5D Elbow

Standards:

ASME B16.9, EN 10253-4:2025, JIS B2312/2313 etc.

2205 is a duplex stainless steel combining austenitic and ferritic phases. It provides significantly higher yield strength than common austenitic grades while offering strong resistance to chloride pitting, crevice corrosion and stress-corrosion cracking. 2205 fittings are frequently selected for oil and gas, offshore, chemical, desalination and other applications where both mechanical strength and corrosion resistance are important.

Chemical Composition

Element	Specified / Typical Range (wt. %)
C	≤0.030
Mn	≤2.00
Si	≤1.00
P	≤0.030
S	≤0.020
Cr	21.0–23.0
Ni	4.5–6.5
Mo	2.5–3.5
N	0.08–0.20
Fe	Balance

Mechanical Properties

Property	Minimum / Requirement
Tensile Strength, min.	620 MPa
Yield Strength, 0.2%, min.	450 MPa
Elongation, min.	25%
Hardness	As required by the applicable fitting specification

Chemical and petrochemical process piping
Oil and gas transmission and production systems
Power generation and utility piping
Food, beverage and pharmaceutical systems
Water treatment and desalination
Marine and offshore piping

Introduction

Specification

Chemical Composition

Element	Specified / Typical Range (wt. %)
C	≤0.030
Mn	≤2.00
Si	≤1.00
P	≤0.030
S	≤0.020
Cr	21.0–23.0
Ni	4.5–6.5
Mo	2.5–3.5
N	0.08–0.20
Fe	Balance

Mechanical

Mechanical Properties

Property	Minimum / Requirement
Tensile Strength, min.	620 MPa
Yield Strength, 0.2%, min.	450 MPa
Elongation, min.	25%
Hardness	As required by the applicable fitting specification