Not all nickel alloys perform the same way under heat and stress. Aerospace engineers know this well. When specifying material for engine components, exhaust systems, or structural fasteners, the grade matters as much as the form. Two of the most consistently specified are Alloy 625 and Alloy 718.
Why These Two Grades Stand Out
Alloy 625 earns its place in aerospace because of its exceptional fatigue strength and resistance to oxidation and corrosion at elevated temperatures. It holds up well in welded assemblies, making it a practical choice for fabricated components that see thermal cycling. Alloy 718 is a precipitation-hardening grade valued for its high tensile strength and the ability to maintain that strength at temperatures where many other alloys begin to soften.
Together, these two grades cover a wide range of aerospace demands. MSM stocks both in round bar, hex bar, wire rod, and flat products, so engineers and procurement teams can source the form they need without chasing multiple suppliers.
Traceability Is Not Optional in Aerospace
Every piece of material going into an aerospace component needs documentation. Mill certifications, heat numbers, and full traceability through the supply chain are non-negotiable. MSM is ISO 9001:2015 certified, and its quality management system is built around absolute traceability from the mill to the customer. That is the kind of supply chain discipline aerospace programs require.
Having the Right Partner in Your Corner
MSM operates as more than a warehouse. When engineers or procurement teams have questions about which grade fits a specific application, MSM brings the technical knowledge to have that conversation. That kind of support is part of what it means to redefine expectations of material supply.
If your aerospace program requires Alloy 625, Alloy 718, or other nickel grades, reach out to the MSM team to check current inventory and discuss your specifications.