Inconel 625 Alloy & Forging

Inconel 625 is a superalloy that is used for its high strength and resistance to pressure, oxidation and corrosion. When used in high temperature applications, this alloy creates a protective oxide layer that enhances its heat-resistance. For applications that need strength or corrosion resistance, Inconel 625 is a multi-use and durable choice. It works well for a wide range of organic and mineral acids and when exposed to salt water, fresh water, air, neutral salts, and alkaline chemicals, at high levels of heat and pressure, this alloy withstands corrosive attacks.

Characteristics of Inconel 625 Alloy

The stiffening effect of molybdenum and niobium in its nickel matrix is how Inconel 625 acquired its strength. The alloy responds best with low cutting speeds, heavy equipment, and rigid tooling as well as positive speeds. When Inconel 625 is being welded, a gas-shielded process is being used, with either a tungsten or a consumable electrode. Post-weld treatments are not necessary for corrosion resistance because Inconel 625–which is also known as UNS N06625–is strong enough to withstand heat by itself. Types of welding methods such as austenitic stainless steels, TIG welding, plasma welding, and shielded metal arc are used in the same way that Inconel 625 is welded. This alloy is resistant to seawater.

Inconel 625 Forgings Applications

Its heat resistance allows it to be used for a variety of uses such as heat shields, furnace hardware, and chemical plants. Some of the applications that require UNS N06625 strength and corrosion resistance are valves, seals, aircraft ducting systems, engine exhaust systems, turbine rings, heat exchangers and land based turbine components. Because of its ability for design strength at elevated temperatures, this alloy is often considered in advanced reactor concepts.

Specialty Marine Engineering Functions

  • Springs
  • Seals
  • Bellows for submerged controls
  • Electrical cable connectors
  • Fasteners
  • Flexure devices
  • Oceanographic instrument components.

Chemical Processing

  • Bubble caps
  • Tubing
  • Reaction vessels
  • Distillation columns
  • Heat exchangers
  • Transfer piping
  • Valves

Aerospace Engineering

  • Aircraft ducting systems
  • Engine exhaust systems
  • Thrust-reverser systems
  • Resistance welded honeycomb structures for housing engine controls
  • Fuel and hydraulic line tubing
  • Spray bars
  • Bellows
  • Turbine shroud rings
  • Heat-exchanger tubing in environmental control systems
  • Combustion system transition liners
  • Turbine seals
  • Compressor vanes

Power Generation and Hardware Manufacturing

  • Gas turbine components
  • Industrial furnace and accessories
  • Heat exchangers
  • Scrubbers
  • Land-based gas turbines

Given the characteristics of Inconel 625, this alloy continues to be a popular choice for various forging applications. Inconel 625 can be used to form parts that come in many different shapes.

Inconel 625 can be formed into simple part shapes in open die forging applications including bars and blocks, disks, stepped-shafts as well as other simple open-die shapes. Semi-closed die or closed-die forging applications can also be used on Inconel 625 parts that have higher volumes, require finer tolerances and less material waste on the completed forged part, or have specific grain flow requirements for enhanced mechanical properties.

Inconel forged parts are used in various industrial applications. The aerospace sector especially relies on Inconel 625 forged parts for many different components, including aircraft engines, including fuel lines, heat exchanger casings, and rocket components.

Inconel 625 forged parts are also used for the following applications:

  • Heat shields
  • Furnace hardware
  • Gas turbine engine ducting
  • Combustion lines/spray bars
  • Chemical plant hardware
  • Special seawater applications

At Weldaloy Specialty Forgings, we are a custom forging factory committed to providing customers with quality Inconel 625 parts. We offer open-die and semi-closed-die forging capabilities, along with heat treat and machining. We provide metallurgical services for projects that require it, which include specifications on grain size and grain direction, to ensure that our finished products meet your mechanical and other testing standards. Our team of engineers and quality personnel oversee our Inconel 625 parts at every step of production and testing to ensure the quality of our products.

Below is a general guideline for Weldaloy’s Inconel 625 forging capabilities. Please contact us for the specific requirements of your Inconel 625 forged parts.

Item Our Capabilities
50" Max OD
Flat Bar / Blocks
16" Max
Cylinders / Sleeves
40" Max OD/Width
Round / Shafts
12" Max OD/Width
Custom Die Press
24" Max OD/Width

Weldaloy Specialty Forgings stands ready to be your Inconel 625 or Inconel 718 forging partner.

Send us your request for quote today – and discover the Weldaloy Specialty Forgings difference.

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