Inconel 625 (UNS N06625, ASTM B443) and 625LCF (N06626) Foil: Versatile Corrosion Protection
Table of Contents:
In a North Sea offshore platform, standard duplex stainless components suffered chloride stress corrosion cracking under cyclic loading, risking catastrophic failure and multimillion-dollar delays. Inconel 625 (UNS N06625, ASTM B443) and 625LCF (N06626) foils mitigate these risks with exceptional pitting resistance and fatigue endurance.
Specifications & Standards
Inconel 625 foil adheres to ASTM B443 (sheet/plate), B446 (rod), ASME SB443/SB446, DIN 2.4856 for seawater and sour service. 625LCF (UNS N06626) follows similar specs with enhanced low-cycle fatigue per AMS 5877.
NACE MR0175/ISO 15156 compliance verified by ASTM G48 (pitting), G36 (SCC), ensuring marine and oil & gas readiness with full MTRs.
Product Forms & Availability
Foils from 0.01 mm to 0.8 mm thick, widths to 1500 mm, solution annealed 1030-1150°C per ASTM B443. LCF variant optimized for bellows forming.
Stock in Mumbai supports custom decoiling/slitting for pharma diaphragms and OEM clamps.
Chemical Composition
| Element | Inconel 625/625LCF % |
|---|---|
| Nickel | Balance |
| Chromium | 20.0-23.0 |
| Molybdenum | 8.0-10.0 |
| Niobium+Ta | 3.15-4.15 |
| Iron | 5.0 max |
| Aluminum | 0.40 max |
| Titanium | 0.40 max |
| Carbon | 0.10 max |
625LCF refines via AOD+ESR for cleaner structure, boosting fatigue life.
Mechanical & Physical Properties
Density 8.44 g/cm³, UTS 827 MPa min (LCF aged), yield 414 MPa, 40% EL, modulus 208 GPa. PREN ~51 for pitting resistance.
LCF excels in 10^4-10^6 cycle fatigue for bellows; thermal cond. 9.8 W/mK RT.
Frequently Asked Questions
Certifications & Compliance
ISO 9001/NADCAP, NORSOK M-630, API 6A, with IGA A262, hardness HV220 max. Export docs: EN10204 3.2, Form E for Asia.
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Inconel 625 and 625LCF foils deliver dependable performance in corrosive, high-stress settings, supported by universal standards and testing. Confidence comes from proven reliability in critical applications. What corrosion challenge can we help you conquer?