What types of superalloys are most commonly used in brake system accessories?
Nickel-Based Superalloys for High Temperature Stability
Nickel-based alloys are widely used in brake system accessories due to their superior resistance to thermal creep, oxidation, and fatigue loading. Alloys such as Inconel 718 and Inconel 738 provide strong mechanical stability under sustained braking cycles. These alloys are commonly used for torque brackets, structural mounts, and heat-resistant housings.
Cobalt-Based Superalloys for Wear Resistance
Brake system accessories experience high friction and abrasion, making cobalt-based superalloys ideal for surface durability. Materials like Stellite 6B and Stellite 4 deliver excellent galling and wear resistance, especially in sliding components or rotating joints. Their carbide-rich microstructure retains hardness even in elevated brake temperatures.
Powder Metallurgy Alloys for Rotating Brake Elements
For high-load components requiring fatigue tolerance and microstructural uniformity, powder metallurgical alloys are preferred. Fine-grain materials such as FGH97 and FGH96 are suitable for rotating brake shafts, actuation components, and high-stress attachment interfaces that experience cyclic loads.
Titanium-Based Alloys for Weight Reduction
When weight reduction is a priority, titanium alloys offer a strong balance of strength, machinability, and temperature resistance. Grades such as Ti-6Al-4V are used for lightweight brackets, linkages, and brake housing components in aerospace and high-performance automotive applications. While titanium may not withstand the highest braking temperatures, it is highly effective in intermediate heat zones.
Final Performance Validation
Regardless of alloy type, brake system accessories undergo rigorous qualification through material testing and analysis and post-processing methods such as hot isostatic pressing (HIP) to ensure reliable performance. Final shaping through superalloy CNC machining guarantees precise fit and assembly compatibility.
