duplex stainless steel
3 in-depth engineering guides on duplex stainless steel — specification, selection, testing and procurement.
Everything on duplex stainless steel
Vajra's engineering team has published 3 technical guides covering duplex stainless steel for industrial valve selection, specification, testing and procurement. Browse the full set below.
Valves for Seawater and Offshore Service: Material Selection Guide
Seawater is one of the most corrosive natural fluids encountered in industry - high chloride concentration, dissolved oxygen, biofouling, and galvanic potential create an extremely aggressive environment that disqualifies carbon steel and standard 316 stainless from use without coating. This guide covers correct material selection, valve types, and standards for seawater and offshore service.
Valve Selection for Seawater Cooling Service - Materials, Corrosion & Standards
Seawater is one of the most corrosive fluids in process engineering. SS 316 fails within months - here is what to specify instead.
Duplex and Super Duplex Stainless Steel Valves: 2205 vs 2507 Guide
Duplex 2205 and super duplex 2507 stainless steels offer the corrosion resistance of austenitic stainless with twice the yield strength - making them the preferred valve materials for seawater, offshore, and chloride-rich chemical service. This guide covers the 2205 vs 2507 selection criteria, PREN pitting resistance numbers, chloride SCC behaviour, NORSOK M-630 qualification, and Charpy impact test requirements.
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