2205 Duplex Stainless Steel — Properties, Welding & Corrosion Resistance
ASTM A240 · Published: 2026-06-30 · Updated: 2026-07-02
2205 duplex stainless steel combines austenitic and ferritic microstructures for twice the strength of 316L with superior chloride stress corrosion cracking resistance.
2205 duplex stainless steel combines austenitic and ferritic microstructures for twice the strength of 316L with superior chloride stress corrosion cracking resistance.
Quick Facts
| Category | |
| Standard | ASTM A240 |
| Density | 7800 |
| Yield Strength | 450 MPa |
| Tensile Strength | 620 MPa |
Global Equivalents & Cross-Reference
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References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu
Stainless & Corrosion-Resistant Steel — Engineering Reference
Stainless steels are defined by their chromium content (minimum 10.5%), which forms a self-healing passive layer of chromium oxide that resists corrosion. Grades are classified by microstructure: austenitic (300 series), ferritic (400 series), martensitic, and duplex.
ASTM A240/A276/A312, EN 10088, JIS G4304/G4305, GB/T 3280/4237
Food processing equipment, medical implants, chemical tanks, architectural cladding, marine hardware, pharmaceutical piping
For welded stainless fabrications, specify the low-carbon variant (304L, 316L) to prevent chromium carbide precipitation at grain boundaries, which causes intergranular corrosion (weld decay).