Super Duplex Steel Valves

Source Super Duplex Steel Valves from verified mills, manufacturers and stockists on MetalMitra. Options span manual and actuated configurations, produced to API 600/BS1414, and every order can ship with an EN 10204 3.1 certificate.

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

Super duplex stainless steel combines a balanced austenitic-ferritic microstructure with high chromium, molybdenum and nitrogen content, giving very high strength and excellent resistance to pitting, crevice corrosion and chloride stress corrosion cracking.

What you can source

• 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.

Key properties

• High Strength — Roughly twice the yield strength of standard austenitic stainless steels.
• Chloride Resistance — Excellent resistance to pitting and crevice corrosion in seawater and brine.
• Stress Corrosion Resistance — Strong resistance to chloride stress corrosion cracking.
• Weight Saving — Higher strength allows lighter designs in suitable applications.

Applications & industries

• Offshore Oil & Gas
• Seawater Systems
• Desalination Plants
• Chemical Processing
• Petrochemical
• Pulp & Paper
• Marine Engineering
• Heat Exchangers
• Pollution Control
• Subsea Equipment
• Fabrication
• General Engineering

Testing & documentation

Inspection and documentation for Super Duplex Steel Valves follow the applicable standard plus any extra requirements in your PO.

• 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

Chemical & mechanical 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 source on MetalMitra

• Checked sellers only — Every supplier profile is screened by MetalMitra before it goes live.
• Faster sourcing — Post one requirement and receive competitive offers without chasing calls.
• Paperwork sorted — MTC 3.1, test reports and TPI arranged as your project demands.
• Global logistics — Seaworthy packing and dispatch to project sites across the world.

Request pricing

Post an RFQ for Super Duplex Steel Valves with your drawing or specification and receive quotes from verified suppliers.

Technical note: Figures shown are indicative. Final acceptance should be based on the applicable standard, approved drawings and the MTC supplied with the material.