A Ni-Cr alloy known for its corrosion resistance and high temperature stability

Inconel® threaded rods, like Inconel 600, 601,625, 686, 718 & 725 threaded rods, are a family of nickel-chromium-molybdenum alloys used for their high strength at elevated temperatures and good corrosion resistance. Because of its high thermal stability, Inconel can be used in service temperatures ranging from cryogenic to 2200°F (982°C). The high alloy content of Inconel threaded rods enable it to withstand a wide variety of severe corrosive environments. In mild environments, such as the atmosphere, sea water, neutral salts, and alkaline media, there is almost no attack to Inconel threaded rods. In more severe corrosive environments the combination of nickel and chromium provides resistance to oxidizing chemicals, whereas the high nickel and molybdenum contents supply resistance to nonoxidizing environments.

Because Inconel threaded rods offer a good balance of corrosion resistance, temperature stability, toughness and strength they are often a material of choice for chemical processing, aerospace, marine, electronics and oil & gas.

ResouresInconel Torque Spec

Fastener TypesThreaded RodsStuds

Common Inconel Threaded Rod Grades

Inconel 600 Threaded Rods

A nickel-chromium alloy with good carburization and oxidation resistance through 2000°F. The alloy has long been used in the heat treating industry and Inconel 600 has useful resistance to dry Cl2 and HCl gases at moderately elevated temperatures.

Inconel 601 Threaded Rods

Inconel 601 is highly resistant to oxidation through 2200°F even under severe thermal cycling. The alloy has good high temperature strength, and retains its ductility after long service exposure. Inconel 601 alloy has good hot corrosion resistance under oxidizing conditions

Inconel 625 Threaded Rods

Inconel 625 is the workhorse of the Inconel family and is one of the most common grades for threaded rods. It exhibits high creep-rupture strength and is oxidation resistant to 1800°F (982°C). Inconel 625 has excellent resistance to hot seawater, scrubber environments and reducing acids and this alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion

Inconel 686 Threaded Rods

An alloy designed for outstanding corrosion resistance in a wide range of severe environments. The alloy is used in the most severe environments encountered in chemical processing, pollution control, pulp and paper production, and treatment of industrial and municipal waste.

Inconel 718 Threaded Rods

Inconel 718 is the most common grade of the hardenable Inconels. This precipitation-hardened nickel-chromium alloy combines outstanding corrosion resistance and high strength at elevated temperatures. The alloy is a about 2x as strong as Inconel 625 having excellent creep-rupture strength at temperatures to 1300°F (700°C) and usable up to 1800°F (982°C). Inconel 718 is often used in gas turbines, rocket motors, spacecraft, nuclear reactors, pumps, and tooling.

Inconel 725 Threaded Rods

A nickel-chromium-molybdenum-niobium age-hardenable alloy that has essentially the same corrosion resistance as Inconel 625, but with a strength of that is twice that of annealed Inconel 625. The strength of this alloy is developed by heat treatment to achieve high ductility and toughness. The alloy is resistant to hydrogen embrittlement and stress-corrosion cracking as well.


 Mechanical Data

Inconel Tensile Data


Inconel 625 Tensile Curve  Inconel 718 Tensile Curve 

Inconel Corrosion Data

Nickel Corrosion Data



Request a Quote / Order

Call: 888-393-4517 or Submit a Request

Not sure what material is best for your application?

Contact an Expert

Recent Posts

Torque Part 2 – How To REALLY Measure Tension

Tension, Not Torque Matters: How to Measure Bolt Tension In our last post, we discussed how measuring torque is an inac ...
Read More

Torque Part 1 – The False Truth: It’s Really Tension that Matters

(Stay tuned next week for Part 2 - How to Measure Tension) Everyone is always concerned about getting the right tor ...
Read More

Sea Water Corrosion: Monel, AL-6XN &Titanium to the Rescue

With over 30% of marine equipment failures being the result of marine corrosion, the subsequent costs have added up; ...
Read More

Fasteners For Hydrochloric Acid (HCl)

While hydrochloric acid (HCl) is a common and critical industrial chemical, it often causes significant maintenance i ...
Read More

Specialty Stainless Steel Fasteners: A-286, Super Dupex & 17-4PH

While there are many grades of stainless steel available for fasteners, we will focus on three of the highest performing ...
Read More

Our material experts are ready to help guide you through your specific application.

Contact an Expert