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Haynes® 214 Foil/Sheet
Available Configurations
Properties common to all products in this list
| Size |
|---|
| 25 x 25 mm to 200 x 200 mm |
Need custom configurations? Please contact us.
Key Features
Haynes® 214 Foil (Ni 75/Cr 16/Al 4.5/Fe 3, UNS N07214) is a nickel-chromium-aluminum-iron alloy foil distinguished by superior high-temperature oxidation resistance through formation of a continuous, self-repairing aluminum oxide scale:
Superior Oxidation Resistance Through Aluminum Oxide Scale Formation
Above approximately 1000 °C, Cr₂O₃ formed by chromia-forming alloys becomes volatile and provides diminishing protection. Haynes® 214 addresses this by forming a continuous, self-repairing aluminum oxide scale that provides substantially better oxidation protection across this temperature range, establishing it as the oxidation-resistant benchmark in the Haynes alloy family.
Best Cyclic Oxidation Performance of Any Nickel Superalloy Tested
Long-term cyclic oxidation tests confirm that Haynes® 214 exhibits superior oxidation performance over all nickel superalloys tested at 982 °C, 1093 °C, and 1149 °C, attributed to its ability to form and maintain the protective alumina scale through repeated thermal cycling where chromia-forming alloys suffer progressive scale spallation.
Self-Repairing Alumina Scale
The aluminum oxide scale formed by Haynes® 214 is self-repairing under thermal cycling, re-forming over damaged areas during subsequent oxidation exposure, a behavior that distinguishes alumina-forming alloys from chromia-forming grades in cyclic high-temperature service.
Density and Physical Properties
Density of approximately 8.05 g/cm³ and the alumina-scale formation mechanism position Haynes® 214 as the oxidation-resistant benchmark for applications above 1000 °C, where the alumina scale’s thermodynamic stability provides protection that chromia scales cannot sustain.
Maximum Service Temperature to Approximately 1100 °C
Maximum service temperature to approximately 1100 °C in air, combined with the superiority of the alumina scale protection at this temperature, qualifies Haynes® 214 for furnace and kiln heat shields, aerospace thermal protection panels, and industrial heating element sheaths at service conditions that degrade chromia-forming alloys.
Industrial Applications
Haynes® 214 Foil is used wherever oxidation resistance above approximately 1000 °C is the primary selection criterion and chromia-forming alloys are inadequate:
- ✦ Furnace and Kiln Heat Shields Operating Above 1000 °C
- Used for furnace and kiln heat shields operating above approximately 1000 °C, where chromia-forming alloys degrade through volatile Cr₂O₃ loss and progressive oxidation attack, and the self-repairing alumina scale of Haynes® 214 provides the sustained protection required for long service life.
- ✦ Catalytic Combustion Burner and Reactor Elements in Ultra-High-Temperature Service
- Applied as catalytic combustion burner and reactor elements in ultra-high-temperature service, where both oxidation resistance at extreme temperatures and catalytic compatibility of the alumina scale surface support reliable performance in highly oxidizing combustion environments.
- ✦ Aerospace Thermal Protection and Heat Shield Panels in the Highest-Temperature Zones
- Used for aerospace thermal protection and heat shield panels in the highest-temperature zones, where the confirmed superior oxidation performance of Haynes® 214 at 1093 °C and 1149 °C in cyclic testing qualifies it for applications where other nickel superalloy foils would suffer unacceptable oxidation damage.
- ✦ Industrial Heating Element Sheaths and Reflectors to Approximately 1100 °C
- Applied as industrial heating element sheaths and reflectors in service to approximately 1100 °C, where the alumina scale’s stability at this temperature and resistance to spallation under thermal cycling provide the long service life that chromia-forming sheaths cannot sustain.
- ✦ Reference Alumina-Forming Nickel Alloy for Oxidation Mechanism Research
- Used as the reference alumina-forming nickel alloy for oxidation mechanism studies, for comparative evaluation of alumina versus chromia scale behavior under cyclic thermal loading, and as a model substrate for reactive air aluminizing and diffusion coating development for gas turbine applications.
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |