Rod stainless steel Sanicro® 35

tubeaeronautical

Sanicro® 35 is a super‑austenitic alloy developed to bridge the gap between standard duplex/austenitic grades and nickel alloys for demanding process applications, particularly heat-exchanger tubing. It offers strong localized corrosion resistance combined with competitive price‑performance versus traditional nickel alloys.

Key benefits

• Prevents deposit buildup, pitting and stress corrosion cracking, reducing plugging, efficiency loss and unscheduled maintenance.
• High structural stability with excellent formability and ductility, enabling cold bending to tight radii.
• Simplified welding: typically requires no pre‑heating or post‑weld heat treatment, reducing fabrication time and complexity.

Typical applications

• Crude Distillation Unit (CDU) overhead systems and recuperators
• REAC units and other refinery heat exchangers
• Gas cleaning and sour water systems
• Chemical and petrochemical plants handling chlorinated hydrocarbons, PTA, inorganic and organic acids
• Seawater‑cooled heat exchangers, biofuels and renewable energy applications
• Wellhead panels, X‑mas trees, hydraulic and instrumentation distributors

Performance highlights

• Exceptional resistance to crevice corrosion and pitting compared with alternative alloys.
• Crevice corrosion resistance higher than Alloy 625 and at least on par with Alloy C‑276 in laboratory tests.
• Designed to achieve significantly higher critical pitting temperatures than standard grades.

Technical data

• Trade name / model: Sanicro® 35 (member of the Sanicro® family)
• UNS: N08935
• PRE (Pitting Resistance Equivalent): ~52 (super‑austenitic)
• Composition note: super‑austenitic grade with moderate nickel content (designed to outperform conventional 6Mo grades)
• Forms available: seamless tube (preferred format), round bar and seamless pipe
• Standard pipe / bar outer diameter range: 20 to 240 mm OD (bar supplied to production order only)
• Typical substitutions: can replace several specialized tube grades and serve as an alternative to 6Mo alloys, Alloy 825 and Alloy 625 in many applications
• Welding / fabrication: structurally stable grade that typically requires no pre‑heating or post‑weld heat treatment (reduces fabrication complexity)
• Application sectors: refineries, petrochemical and chemical plants, seawater‑cooled systems, renewable energy and hydraulic & instrumentation (H&I) distribution