Alloy 907 UNS N19907: An Overview

In the demanding world of high-performance engineering, materials must withstand extreme conditions. Alloy 907 UNS N19907 is a premier iron-nickel-cobalt superalloy engineered for reliability where thermal expansion and strength are critical. This article explores its key properties, diverse applications, and essential technical data.

Key Material Properties and Characteristics

Alloy 907 is renowned for its unique combination of a low coefficient of thermal expansion (CTE) and high strength over a wide temperature range, from cryogenic levels up to about 650°C (1200°F). This controlled expansion property minimizes thermal stress in constrained assemblies. It also exhibits excellent fatigue resistance and good weldability, making it a versatile choice for complex, mission-critical components.

Primary Industrial Applications

This superalloy’s properties make it indispensable in aerospace and precision engineering. Its primary uses include seals, rings, and structural components in jet engines and gas turbines, where dimensional stability under thermal cycling is non-negotiable. It is also crucial in cryogenic systems and for instrumentation in environments with fluctuating temperatures.

Technical Specifications and Data

Alloy 907 UNS N19907 conforms to strict standards. Its nominal composition includes iron, nickel (approx. 38%), cobalt (approx. 13%), and additions of niobium and titanium for strengthening. Key mechanical properties include a high yield strength and excellent creep rupture strength. Designers rely on its detailed datasheets for precise thermal expansion curves and stress-rupture data.

Frequently Asked Questions (FAQ)

Q: What is the main advantage of Alloy 907?
A: Its primary advantage is maintaining high strength while having a thermal expansion rate that matches certain ceramics and glasses, preventing stress failure in bonded or constrained systems.

Q: Can Alloy 907 be machined and welded easily?
A: Yes, it is considered readily weldable using common techniques and can be machined, though it requires parameters similar to other high-strength superalloys.

Q: Where is UNS N19907 typically used?
A: Its most critical applications are in aerospace for turbine seals and rings, and in precision equipment for cryogenic and thermally stable structures.

Your Next Step for High-Performance Components

Selecting the right material is foundational to engineering success. For projects demanding unmatched thermal stability and strength, Alloy 907 UNS N19907 is a proven solution. Explore detailed material data sheets and connect with a specialist today to discuss how this advanced superalloy can enhance your design’s performance and reliability.