Duplex Steel Fasteners

Need a dependable duplex fastener? Duplex Steel Fasteners on MetalMitra come in bolts, nuts and washers to ASTM A182, ready for bolted joints that stay tight.

Duplex Steel Fasteners are mechanical joining components such as bolts, nuts, studs, screws and washers used to assemble flanges, structures, machinery and equipment.

Duplex stainless steel has a two-phase austenitic-ferritic structure that delivers higher strength than standard austenitic grades together with good resistance to pitting, crevice corrosion and chloride stress corrosion cracking.

Available forms & variants

• Bolts — Hex, heavy hex, stud, U, J, T, eye and foundation bolts.
• Nuts — Hex, heavy hex, lock, wing, dome and nylock nuts.
• Studs & Threaded Rods — Fully and partially threaded studs and rods.
• Screws & Washers — Machine screws, socket screws, plain and spring washers.

Performance highlights

• High Strength — Roughly double the yield strength of standard 300-series grades.
• Corrosion Resistance — Strong resistance to pitting, crevice and general corrosion.
• SCC Resistance — Far better resistance to chloride stress corrosion cracking.
• Cost Efficient — Thinner walls and long life trim material and lifecycle costs.

Typical applications

• Oil & Gas
• Chemical Processing
• Petrochemical
• Desalination
• Marine Applications
• Pulp & Paper
• Heat Exchangers
• Pressure Vessels
• Water Treatment
• Offshore Platforms
• Fabrication
• General Engineering

Quality checks & certification

Every lot of Duplex Steel Fasteners sourced through MetalMitra can be inspected and documented to the governing standard and your purchase order.

• Dimensional & thread inspection
• Visual inspection
• Grade verification against the order
• Chemical composition verification
• Mechanical / proof load testing as applicable
• Hardness testing as applicable
• EN 10204 3.1 Mill Test Certificate
• Project-specific documentation on request

Material properties

Chemical composition and mechanical properties are supplied to the limits of the governing material standard. Actual heat values are reported on the mill test certificate shared with each consignment.

Why buy through MetalMitra

• Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
• One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
• Full traceability — Heat numbers, EN 10204 3.1 MTCs and third-party inspection on request.
• Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.

Ready to buy?

Send your size, grade, quantity and delivery location for Duplex Steel Fasteners, and matching suppliers on MetalMitra will come back with offers.

Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the mill test certificate.