Most common materials used in LMD metal 3D printing

Nickel-Based Superalloys

Nickel-based superalloys are the most widely used in LMD due to their excellent high-temperature strength and oxidation resistance. Alloys such as Inconel 718 and Inconel 625 are commonly used for gas turbine repair, combustor liners, and structural engine components. For more extreme temperature applications, advanced single crystal alloys like PWA 1484 or Haynes 188 are utilized in turbine blade trailing edge repair.

Titanium Alloys

Titanium alloys offer high specific strength and corrosion resistance, making them ideal for lightweight structures in aerospace and aviation. Popular LMD materials include Ti-6Al-4V and Ti-6Al-4V ELI, which are used in structural brackets, engine mounts, and high-stress external panels. Their compatibility with heat treatment and CNC finishing further improves fatigue performance.

Cobalt-Based Alloys

For applications requiring wear and corrosion resistance under extreme conditions, cobalt-based alloys such as Stellite 6 and cobalt-based alloys are frequently used in LMD. They are ideal for valve seats, pump components, and sealing surfaces in oil and gas and power generation environments.

Stainless Steels

Stainless steels are often employed where corrosion resistance and moderate mechanical strength are required. Grades like 316L and 17-4 PH are used in structural housings, manifolds, and energy system components. They are also compatible with LMD repair applications and follow-up processes such as CNC machining and surface coating.

Tool Steels and Industrial Metals

For large-scale industrial tooling, tool steels like maraging steel 18Ni300 and carbon steels are also applied in LMD. These materials are suitable for mold repair, die reinforcement, and functional prototyping for automotive and mining applications.