CarTech Ferrium S53* alloy is a corrosion resistant, ultrahigh-strength steel for structural aerospace applications. The alloy has provided mechanical properties equal to, or better than, conventional ultrahigh-strength steels such as CarTech 300M and SAE 4340 with the added benefit of modest corrosion resistance. Laboratory testing has shown CarTech Ferrium S53 alloy to possess improved resistance to stress-corrosion cracking (SCC) over CarTech 300M and SAE 4340.

CarTech Ferrium S53 alloy utilizes an efficient M2C strengthening dispersion precipitated through tempering while avoiding other carbides. This maximizes strength, wear resistance, and toughness resulting in a unique combination of mechanical properties for a corrosion-resistant steel. CarTech Ferrium S53 alloy uses a passive oxide film to provide corrosion resistance similar to CarTech 440C stainless steel. It also has high hardenability, permitting less severe quench conditions for a given section size and resulting in less distortion during heat treatment.

*Manufactured and sold under license from QuesTek Innovations LLC. Ferrium is a registered trademark of QuesTek Innovations LLC.

Applications:
CarTech Ferrium S53 alloy can be considered as a candidate for use in applications such as:

• Fasteners

• Landing Gear

• Actuators

• Structural members

• Drive shafts