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Stainless Steel 2205 Duplex

Material Type：Metal
Material Name：Stainless Steel 2205 Duplex
Alternative Names：UNS S32205 | EN 1.4462 | ASTM A240
Process Compatibility：CNC Milling, CNC Turning, Welding, Heat Treatment
Stainless Steel CNC Machining Service的副本
Stainless Steel 2205 Duplex
Description
S2205 Duplex Stainless Steel is a dual-phase alloy composed of approximately equal parts austenite and ferrite. It combines the excellent corrosion resistance of austenitic stainless steels with the high strength of ferritic grades. It provides superior resistance to stress corrosion cracking and pitting, making it ideal for harsh environments such as marine, oil & gas, and chemical processing.
Lead Time: < 10 days
Wall Thickness: 0.75 mm
Tolerances: ±0.005″ (±0.125mm)
Max Part Size: 200 cm x 80 cm x 100 cm
 
Classification of Metal Performance Parameters
Mechanical Properties Ultimate Tensile Strength 800
Yield Strength 550
Young’s Modulus / Elasticity 200
Elongation at Break 25
Hardness HB 290
Fatigue Strength 300
Physical Properties Density 7.8
Corrosion Resistance Excellent
Magnetism Magnetic
Weldability Fair
Impact Toughness High
Thermal Properties Maximum Service Temperature 300
Thermal Expansion Coefficient 13
Thermal Conductivity 19
Creep Resistance High
Electrical Properties Electrical Resistivity 85
Electrical Conductivity 2.5
Dielectric Strength N/A
Processing & Surface Treatment Machinability Fair
Surface Finish Compatibility Good
Formability Moderate
Special Properties Biocompatibility Yes
Flame Retardancy Yes
UV Resistance Moderate
Recyclability Yes

Introduction to Stainless Steel 2205 Duplex

What
Stainless Steel 2205 Duplex (UNS S32205 / EN 1.4462) is a dual-phase stainless steel with a microstructure of roughly 50% austenite and 50% ferrite. This balance gives it twice the yield strength of standard austenitic stainless steels like 304 or 316, while still providing good toughness and ductility. It is particularly valued for its resistance to stress corrosion cracking, pitting, and crevice corrosion in chloride-rich environments such as seawater and chemical plants.
Advantages
High strength (about 2x 304/316)
Superior resistance to pitting and crevice corrosion
Excellent resistance to stress corrosion cracking
Good weldability
 
 
 
 
 
Applications
Offshore oil & gas equipment
Marine structural parts
Chemical processing tanks
Heat exchangers
 
 
 
 
 

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