KD Fasteners is a nuts and bolts manufacturer and fastener supplier offering Inconel alloy fasteners for the most demanding service conditions. When high temperature and high pressure would cause steel and aluminum to weaken, Inconel alloy nuts and bolts hold their strength and keep critical assemblies secure.
Why Choose Inconel for Heat-Resistant Fasteners?
Inconel is a family of nickel-chromium superalloys valued for performance in extreme heat. As temperatures climb, Inconel forms a thick and stable passivating oxide layer across its surface, which shields the metal underneath from further corrosion and attack. That single property makes Inconel one of the most reliable choices for heat-resistant fasteners in applications where ordinary materials simply cannot survive.
Heat-resistant nuts and bolts made from Inconel also stand up to oxidation and chemical exposure under load, so they stay reliable across long service lives in punishing settings.
Common Applications
Because Inconel alloy fasteners tolerate conditions that destroy other metals, they show up in some of the toughest environments engineered today, including:
- Rocket ships and aerospace propulsion systems
- Submarines and marine equipment
- Race cars and high-performance engines
- Gas turbine blades and exhaust components
- Chemical processing, oil, and gas equipment
Inconel Grades We Carry
We carry a wide range of Inconel grades to match your specification. A few of our most popular are 625, 718, and 725. Our full lineup includes:
- 600: Nickel-chromium alloy with good oxidation and carburization resistance at high heat, common in furnace and chemical processing equipment.
- 601: Higher aluminum content than 600 for improved oxidation resistance and added strength at elevated temperatures.
- 625: Versatile nickel-chromium-molybdenum alloy with strong corrosion resistance and good weldability for marine and chemical service.
- 718: Age-hardened grade roughly twice as strong as 625, the standard choice for aerospace and gas turbine fasteners.
- 725: High-strength, corrosion-resistant grade favored for oil and gas and subsea hardware.
- 925: Precipitation-hardenable alloy with excellent resistance to sour gas and chloride environments, used in oil-production equipment.
- X750: Precipitation-hardenable nickel-chromium alloy that holds its strength at high temperature, used for springs and turbine components.
Standard, Metric, and Custom Options
We stock many sizes of Inconel hex bolts, nuts, and washers ready to ship. As a metric nuts and bolts supplier, we handle metric specifications right alongside standard sizing, so international projects are covered.
If your application calls for something we do not stock, our engineers can produce custom Inconel alloy nuts and bolts to your exact requirements. Secondary services such as threading and plating are available in-house to finish parts to spec.
REQUEST A QUOTE
Request a Quote on Inconel Alloy Fasteners
Tell us about your application, grade, and quantity, and we will help you find the right Inconel alloy fasteners for the job. Request a quote today, and a KD Fasteners specialist will follow up with pricing and availability.
Frequently Asked Questions About Inconel Alloy Fasteners, Nuts, and Bolts
What temperature can Inconel fasteners withstand?
It depends on the grade. Inconel 718 holds excellent creep-rupture strength up to roughly 1300°F (700°C) and stays usable to about 1800°F (982°C). Inconel 625 maintains strong performance near 1500°F and resists oxidation at even higher temperatures. Across the family, Inconel works from cryogenic temperatures up through severe heat, which is why it suits aerospace and turbine service.
Can Inconel fasteners be welded or machined?
Yes. Inconel 625 welds and machines readily without complex post-weld heat treatment. Inconel 718 is also weldable, though it is more sensitive because it is age hardened, so it often needs aging heat treatment after fabrication to restore full strength. We can advise on the right approach for your parts.
Are Inconel fasteners magnetic?
Inconel is largely non-magnetic at room temperature thanks to its high nickel and chromium content. That makes it useful for instrumentation and other applications where magnetic interference is a concern.