GMP® 36™

Low Thermal Expansion Nickel-Iron Alloy Powder

GMP® 36™ from Globus Metal Powders is a nickel-iron (FeNi36) alloy powder engineered for extremely low thermal expansion, high dimensional stability, and predictable mechanical performance. Produced via argon inert gas atomisation, this powder features ultra-low oxygen content, tightly controlled minor elements, and optimised spherical particle morphology, making it suitable for PM-HIP, additive manufacturing (AM), metal injection moulding (MIM), and thermal spray applications. 

Alloy 36™ is widely used in precision instruments, aerospace, optics, and scientific equipment, where thermal stability is critical. Its unique composition allows components to maintain dimensional integrity across temperature fluctuations, making it ideal for precision tooling, assemblies, and structures exposed to variable thermal environments. 

Differentiation

When compared with other powders in the Globus portfolio: 

• Versus nickel-based superalloys (718, 625, Alloy X, 939): Alloy 36 is not designed for high-temperature mechanical strength but instead minimises thermal expansion, making it essential for precision applications where dimensional control is critical. 

• Versus stainless steels (316L, F53) and ferritic/martensitic steels (P91, EUROFER97): While these alloys may provide corrosion resistance or high-temperature performance, Alloy 36 uniquely offers near-zero thermal expansion combined with predictable mechanical behaviour. 

• Unique Globus advantage: The ultra-low oxygen and tightly controlled minor elements minimise internal defects and oxide formation, ensuring high-performance PM-HIP consolidation and additive manufacturing builds. 

• Spherical morphology and optimised PSD ensure consistent flow, uniform packing, and layer deposition, crucial for precision near-net-shape components.