Precision-Engineered Inconel Alloy 625® Socket Capscrews

Inconel Alloy 625®: Information, Composition & Properties for Socket Capscrews

Inconel Alloy 625® is a high-performance nickel-based superalloy engineered for exceptional strength and superior resistance to oxidation and corrosion across a broad range of temperatures, from cryogenic levels up to 2000°F (1093°C). Unlike many other high-temperature alloys, Inconel 625® derives its high mechanical strength from the solid solution strengthening effect of molybdenum and niobium within its nickel-chromium matrix, eliminating the need for complex precipitation hardening treatments. This unique metallurgical structure makes it a premier choice for socket capscrews used in safety-critical assemblies where structural integrity must be maintained under extreme pressure and thermal stress.

Composition:

The alloy is primarily composed of nickel (minimum 58%) and chromium (20-23%), providing a robust foundation for general corrosion and oxidation resistance. Significant additions of molybdenum (8-10%) and niobium (3.15-4.15%) work together to stiffen the alloy matrix, while iron is limited to a maximum of 5%. Trace amounts of elements like titanium, aluminum, and manganese are also present to further refine its properties.

Properties:

• Outstanding Corrosion Resistance: The high chromium and molybdenum content provides exceptional resistance to pitting and crevice corrosion, while the nickel content ensures immunity to chloride-ion stress corrosion cracking.
• High Tensile and Fatigue Strength: With a typical tensile strength ranging from 120-160 ksi (827-1,103 MPa), these fasteners can withstand heavy dynamic loads and cyclic stresses, making them ideal for aerospace and subsea applications.
• Thermal Stability: It maintains remarkable toughness and oxidation resistance in high-heat environments, resisting scaling and degradation even under continuous exposure to extreme temperatures.
• Non-Magnetic and Versatile: Being non-magnetic, Inconel 625® socket capscrews are suitable for sensitive electronic or marine equipment where magnetic interference must be avoided.

Why Inconel Alloy 625® is good for Socket Capscrews:

The combination of high torque capability provided by the precision-engineered socket drive and the inherent strength of the alloy allows for secure, high-integrity fastening in tight spaces. These capscrews are essential for marine engineering, chemical processing, and nuclear reactors where standard stainless steels would succumb to pitting, crevice corrosion, or thermal fatigue. By choosing Inconel 625®, industries ensure long-term reliability and safety in the most aggressive environments on earth.

At West Special Fasteners, we take pride in every Inconel Alloy 625® Socket Capscrew we produce, no matter the application.

99% on-time delivery

At West Special Fasteners, we deliver precision-engineered fasteners with a proven 99% on-time delivery record, ensuring your projects stay on schedule. With lead times as short as 4 weeks for full-service orders, we provide unmatched reliability for industries where timing is critical.

• Minimise delays – Receive your special fasteners exactly when needed, helping you avoid costly project interruptions.
• Support critical operations – Our dependable delivery is essential for sectors like defence, offshore, and renewables, where timing is non-negotiable.
• Boost project efficiency – Reliable deliveries streamline your workflow, allowing you to focus on execution without supply chain concerns.
• Maintain your reputation – Trust in our punctuality to ensure your commitments to your clients are met, every time.
• Transparent communication – Realistic timelines and proactive updates at every stage.
• Efficient production – Our advanced facilities and streamlined processes enable us to deliver on time, even for complex and bespoke projects.

Our ability to always deliver on time sets us apart in the fastener industry. While with many competitors you can face frequent delays, we ensure your orders are delivered with precision and professionalism – backed by our fully traceable production process and industry-leading expertise.