About

Duplex 2205 bolts are high-strength, corrosion-resistant fasteners widely used in marine, chemical, and oil & gas industries. They outperform standard stainless steels like 316/317 by resisting chloride stress corrosion cracking, pitting, and crevice corrosion, making them ideal for harsh environments.

Key Specifications of Duplex 2205 Bolts

• Material Grade: Duplex Stainless Steel 2205 (UNS S31803 / S32205, EN 1.4462, ASTM A182 F51/F60 equivalents)
• Structure: Austenitic-Ferritic stainless steel (balanced mix for strength + corrosion resistance)
• Mechanical Properties:
• Tensile Strength: ~620 MPa (higher than SS316)
• Yield Strength: ~450 MPa
• Hardness: ~290 HB
• Impact Resistance: Excellent, even at low temperatures
• Corrosion Resistance:
• High resistance to chloride stress corrosion cracking
• Strong protection against pitting and crevice corrosion
• Good resistance to sulfide stress corrosion
• Standards Available: ASME, DIN, ISO, ASTM, and custom dimensions

Common Uses of Duplex 2205 Bolts

• Marine Industry: Shipbuilding, offshore platforms, subsea equipment (resists seawater corrosion).
• Chemical Processing Plants: Handles aggressive chemicals and high-pressure environments.
• Oil & Gas Industry: Pipeline flanges, pressure vessels, and drilling equipment.
• Desalination Plants: Withstands chloride-rich environments.
• Structural Applications: Bridges, heavy machinery, and load-bearing assemblies requiring high fatigue resistance.

Comparison: Duplex 2205 vs SS316 Bolts

Why Choose Duplex 2205 Bolts?

• Stronger than 300-series stainless steels (like 316/317).
• Longer service life in aggressive environments.
• Cost-effective in the long run due to reduced maintenance and replacement needs.
• Good weldability and workability, making them versatile for fabrication.