Inconel 686, 690, 693, 718 and Incoloy 660 Foil: Advanced Nickel Alloys for Extreme Conditions

A geothermal steam turbine in Indonesia failed prematurely due to stress corrosion in chloride-rich vapors, causing blade erosion and $4 million in repairs. Alloys like Incoloy 660 (UNS S66286), 686 (N06686), 690 (N06690), 693 (N06693), and 718 (N07718) foils address such challenges with tailored strength and corrosion resistance.

Specifications & Standards

Incoloy 660 meets ASTM A286/AMS 5731 (DIN 1.4980), 686 ASTM B446 (2.4606), 690 ASTM B166 (2.4642), 693 custom high-temp specs, 718 ASTM B670/AMS 5596 (2.4668). All support NACE MR0175 for sour service.

Testing per ASTM G48 pitting, E8 tensile ensures pharma/power compliance with EN 10204 3.1 exports.

Product Forms & Availability

Foils 0.01-0.5 mm thick across grades, annealed/aged conditions per ASTM. 718 foil for turbine seals, 686 for acid cladding.

Mumbai stocks enable rapid delivery with custom slitting for fabricators.

Mechanical & Physical Properties

660: UTS 1035 MPa aged. 686: PREN 55 pitting resist. 690: Oxid to 1150°C. 693: UTS 746 MPa. 718: 1300 MPa UTS, -250 to 700°C.

Densities ~8.2 g/cm³, excellent weldability/formability.

Frequently Asked Questions

ASTM B670 plate, sheet and strip, AMS 5596/5597, DIN 2.4668. Aged UTS 1275 MPa, creep to 650°C. NACE MR0175, G48 for sour/marine. MTRs with heat treat certs for aero/power exports.

686 (N06686, 2.4606) higher Cr+Mo+W (55 PREN) beats C276 in pitting/crevice in HCl/H2SO4. Low Fe minimizes weld issues. For chemical pollution control.

0.01-0.6 mm per AMS/ASTM tol., widths 200-1200 mm. Aged 718 to 0.03 mm turbine foils; annealed 690 for steam paths. Mumbai ready-ship.

Certifications & Compliance

AS9100, NADCAP HT/Weld, API 6A Monogram, with UT ASTM A388, IGA A262. Export PED/CE, Form A.

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

These Inconel foils provide specialized solutions validated by standards for demanding sectors. Buyers rely on their proven durability. Which alloy fits your critical need?