Nickel 625

Nickel 625 SupplierNickel 625

Nickel 625, also known as Inconel 625, is a nickel-based superalloy that possesses high strength properties and resistance to elevated temperatures. It also demonstrates remarkable protection against corrosion and oxidation. Its high stress tolerance, wide temperature range both in and out of water, and resistance to corrosion in highly acidic environments make Alloy 600 a suitable choice for nuclear and marine applications. Stainless Shapes is a trusted Inconel 625 supplier, so contact us today!

Nickel 625 Specifications

Chemical Composition – The chemical properties of Nickel 625 that make it so fascinating is 20% chromium and 8% monel, with the remainder being balanced with Nickel. This allows for a beautiful form and a great metal for corrosion resistance.

Physical Properties –  They form a disk-shaped morphology and are coherent on the matrix. When tested at 998 K, a δ-phase precipitate begins forming, which consists of Ni3(Nb, Mo) in an orthorhombic crystal structure. They form in a needle-like morphology and are incoherent with the matrix. Both of these precipitates can be completely dissolved back into the matrix when the sample is heated to 1148 K. This leads to the ability to recover creep properties of the alloy to prolong the material’s lifetime.

Inconel 625Machinability – The design of Inconel 625 intended it as a solid solution strengthened material without a significant microstructure. This holds at low and high temperatures, but there is a region (923 to 1148 K) where precipitates form that are detrimental to the creep properties, and thus the strength, of the alloy. Under any creep conditions (high temperature with an applied stress), M23C6-type carbides form at the grain boundaries. When tested at 973 K, γ” precipitates begin forming. These γ” phase precipitates are ordered A3 B type with a composition of Ni3(Nb, Al, Ti) and a tetragonal crystal structure.

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We are a proud Nickel 625 supplier. If you aren’t sure if Nickel 625 is right for you, give us a call! We have a dedicated sales team full of sales experts in Florida and Illinois who know every aspect of the field. If you want to make sure you are receiving the best material for your operation, we can talk you through your job and what the next best steps will be. Just call us today at (800) 748-9811

Furthermore, for a prompt and accurate quote, call us today.

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Frequently Asked Questions

Inconel 625 (UNS N06625, AMS 5666) is a solid-solution-strengthened nickel-chromium-molybdenum alloy containing 58% minimum nickel, 20-23% chromium, 8-10% molybdenum, and 3.15-4.15% niobium. It is used in aerospace, marine, chemical processing, and oil and gas applications requiring excellent corrosion resistance combined with high strength from room temperature to approximately 1800 F.

Stainless Shapes stocks Inconel 625 in round bar, flat bar, plate, and other forms. Common stock dimensions include bar diameters from 1/4" through several inches and plate in standard sizes. Contact the team at 800-748-9811 or via the online quote form for current inventory.

Inconel 625 has excellent strength at elevated temperatures -- its tensile strength at 1200 F is approximately 95 ksi, and at 1400 F approximately 70 ksi. This far exceeds stainless steel grades at the same temperatures.

The primary difference between Inconel 625 and 718 is the strengthening mechanism: 625 is solid-solution-strengthened (no aging heat treatment required) while 718 is precipitation-hardenable (requires aging to achieve maximum strength). 718 achieves much higher ambient-temperature tensile strength (~185 ksi aged) than annealed 625 (~135 ksi). 625 is easier to weld than 718 and is commonly used as weld overlay filler material.

Yes, Inconel 625 can be welded using TIG or MIG processes. It is commonly used as both base metal and weld filler (ERNiCrMo-3). It is significantly more weldable than Inconel 718 and is widely used as weld overlay to protect carbon steel components in corrosive service.

Inconel 625 has outstanding corrosion resistance in seawater. It is used for subsea umbilical cables, deep-sea ROV components, seawater heat exchangers, and marine fasteners. Its combination of high strength and marine corrosion resistance makes it one of the preferred alloys for offshore applications.

Inconel 625 can be machined, but it is challenging due to work-hardening tendency, high-temperature strength, and low thermal conductivity. Rigid setup, sharp carbide inserts, slow cutting speeds (typically 50-100 SFM), high feeds, and flood coolant are required.

Inconel 625 is used in jet engine exhaust systems, combustion liners, sea-water heat exchangers, chemical processing vessels, oil and gas risers and umbilicals, flue gas desulfurization systems, nuclear waste container cladding, and as weld overlay on carbon steel for corrosion protection.

Inconel 625 has much better corrosion resistance than most stainless steels due to its high molybdenum (8-10%) and niobium content. In seawater, organic acids, and mixed acid environments, 625 outperforms 316L and duplex 2205 by a wide margin.

Inconel 625 bar stock is commonly stocked by Stainless Shapes in standard diameters. Prices are significantly higher than stainless steel. Contact the team at 800-748-9811 or via the online quote form for current pricing and availability.

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