Duplex Steel Valves

Duplex Steel Valves for flow isolation and control, available on MetalMitra in manual and actuated configurations to ASME / ASTM A995/A182/A351/A890, with mill-certified traceability on every lot.

Duplex Steel Valves are flow-control devices used to start, stop, regulate or prevent backflow of liquids and gases in process and utility piping.

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.

Product range

• Ball Valves — Quarter-turn valves for quick and tight shut-off.
• Gate & Globe Valves — Isolation and throttling valves for process lines.
• Check Valves — Non-return valves to prevent reverse flow.
• Needle & Butterfly Valves — Fine flow control and large-bore regulation.

Why engineers choose it

• 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.

Where it is used

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

Inspection & paperwork

Suppliers on MetalMitra back Duplex Steel Valves with the checks and paperwork your QA team expects.

• Dimensional inspection
• Visual inspection
• Grade verification against the order
• Shell and seat pressure testing
• Valve operation testing
• Positive Material Identification (PMI) as applicable
• EN 10204 3.1 Mill Test Certificate
• Third-party inspection (TPI) 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.

The MetalMitra advantage

• 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.

Get a quote

Tell us the specification, quantity and destination you need for Duplex Steel Valves. MetalMitra connects you with suppliers who can deliver.

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