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 plants Oil and gas gathering and processing Process branch piping Water treatment and utility systems Food, pharmaceutical and sanitary piping Offshore and marine systems

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 plants Oil and gas gathering and processing Process branch piping Water treatment and utility systems Food, pharmaceutical and sanitary piping Offshore and marine systems

2205 Duplex Stainless Steel Tees

Grade: 2205/S32205 /S31803

Types:

Equal Tee, Straight Tee, Reducing Tee, Seamless Tee, Welded Tee, Butt-Welding Tee.

Standards:

ASTM B16.9, EN10253-4, JIS B2312/2313

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 plants
Oil and gas gathering and processing
Process branch piping
Water treatment and utility systems
Food, pharmaceutical and sanitary piping
Offshore and marine systems

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