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 Note: Values are presented as representative ASTM A182 grade requirements. The applicable standard edition and material certificate govern the final chemical limits.

Mechanical Properties Property Minimum / Requirement Tensile Strength, min. 620 MPa Yield Strength, 0.2%, min. 450 MPa Elongation, min. 25% Hardness As specified by applicable standard / product condition

Oil and gas production and transmission Chemical and petrochemical processing Offshore and marine systems Desalination and seawater service Pulp and paper and chloride-containing process equipment

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 Note: Values are presented as representative ASTM A182 grade requirements. The applicable standard edition and material certificate govern the final chemical limits.

Mechanical Properties Property Minimum / Requirement Tensile Strength, min. 620 MPa Yield Strength, 0.2%, min. 450 MPa Elongation, min. 25% Hardness As specified by applicable standard / product condition

Oil and gas production and transmission Chemical and petrochemical processing Offshore and marine systems Desalination and seawater service Pulp and paper and chloride-containing process equipment

2205 Stainless Steel Flange

Grade: 2205/S32205 /S31803

Flange types：

Weld Neck (WN); Slip-On (SO); Blind (BL); Socket Weld (SW); Threaded (TH); Lap Joint (LJ); Orifice Flange where specified

Nominal size：

ASME: NPS 1/2–24 under B16.5; large diameter NPS 26–60 under B16.47; EN/JIS/GB/T sizes depend on applicable standard

Pressure rating：

ASME Class 150, 300, 400, 600, 900, 1500, 2500 (availability depends on size/type); EN/GB PN classes; JIS 5K–63K

2205 is a duplex stainless steel containing approximately equal proportions of austenite and ferrite. It combines substantially higher yield strength than common austenitic grades with strong resistance to chloride-induced pitting, crevice corrosion and stress corrosion cracking. 2205 is frequently chosen where both mechanical strength and corrosion resistance are required, allowing thinner sections or higher pressure capability in suitable designs.

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

Note: Values are presented as representative ASTM A182 grade requirements. The applicable standard edition and material certificate govern the final chemical limits.

Mechanical Properties

Property	Minimum / Requirement
Tensile Strength, min.	620 MPa
Yield Strength, 0.2%, min.	450 MPa
Elongation, min.	25%
Hardness	As specified by applicable standard / product condition

Oil and gas production and transmission
Chemical and petrochemical processing
Offshore and marine systems
Desalination and seawater service
Pulp and paper and chloride-containing process equipment

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

Note: Values are presented as representative ASTM A182 grade requirements. The applicable standard edition and material certificate govern the final chemical limits.

Mechanical

Mechanical Properties

Property	Minimum / Requirement
Tensile Strength, min.	620 MPa
Yield Strength, 0.2%, min.	450 MPa
Elongation, min.	25%
Hardness	As specified by applicable standard / product condition