About Alloy
Alloy 422 is a martensitic stainless steel alloy prized for its exceptional combination of high strength, heat resistance, and corrosion resistance. With a chromium content of around 12-13%, it exhibits excellent resistance to oxidation and scaling at elevated temperatures up to 649°C (1200°F). This alloy's composition also includes molybdenum and silicon, contributing to its robust mechanical properties and hardenability. Alloy 422 finds critical applications in aerospace and defense for components like aircraft landing gear and missile parts, as well as in industrial sectors for turbine blades, exhaust systems, and components in chemical processing plants where its strength, toughness, and resistance to harsh environments are paramount.
Product Form & Standard
AMS 5655: Bars / wire/ forging H&T
Chemical Composition
| C | 0.23 max | Mn | 0.7 max |
| Si | 0.35 max | Mo | 1.0 max |
| Cr | 11.5 max | Ni | 0.8 max |
| W | 1.0 max |
Mechanical Properties
| Material | Condition | 0.2 % Yield Strength (ksi) | Ultimate Tensile Strength (ksi) | % Elongation in 2" | % Reduction of Area | Hardness HB |
| Alloy 422 | Hardened & Tempered (AMS 5655) | 140 | 115 | 13 | 25 | 293-341 |
Application
The application of Alloy 422 spans several critical industries where its unique combination of properties is highly advantageous. Primarily, it is used in aerospace and defense for components such as aircraft landing gear, engine parts, and missile components, where high strength, heat resistance, and corrosion resistance are essential. In industrial settings, Alloy 422 finds use in turbine blades, exhaust systems, and components for chemical processing plants due to its ability to withstand high temperatures and corrosive environments effectively. Additionally, it is utilized in power generation for turbine components, where its strength and resistance to oxidation play a crucial role in maintaining operational reliability under extreme conditions.
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