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Alloy 188

A Cobalt-based alloy, Alloy 188 has excellent high temperature strength.

Alloy 188 combines excellent strength at high temperature, superb resistance to oxidising environments and good resistance to sulphate deposit hot corrosion. It is readily weldable with good hot and cold forming characteristics.


Product formSize range fromSize range to
Alloy 188 round bar10 mm168 mm GET A QUOTE
Alloy 188 sheet & plate0.38 mm50.8 mm GET A QUOTE
Alloy 188 welding wire0.635 mm2.36 mm GET A QUOTE

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Welding Consumables

Chemical Analysis



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Perfect for applications in the Aerospace industry

Alloy 188 can be used in a variety of applications, here are just a few examples:

  • Gas turbine engine combuster cans
  • Spray bars
  • Flame holders
  • Afterburner liners

About Alloy 188

Alloy 188 is a Cobalt-based superalloy with a unique combination of high temperature strength and oxidation resistance up to 1093°C, along with good post-aging. The alloy maintains its ductility after prolonged exposure to high temperatures.

Alloy 188 is also particularly resistant to sulphate-deposit hot corrosion.

Alloy 188 is readily fabricated, being welded by both manual and automatic methods including electron beam, Gas Tungsten Arc and resistance welding.

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8.97 g/cm³
Melting range:


UNS Number:
UNS R30188
AMS 5608, AMS 5801, AMS 5772
Download the Alloy 188 Data Sheet Download

FAQs & Resources

An alloy is classed as a Cobalt alloy when its chemical analysis shows Cobalt as a main or balancing element. They belong to the reactive and refractory group of metals and alloys according to the Unified Numbering System (UNS) reference. Cobalt is useful in applications that can utilise its magnetic properties, corrosion resistance, wear resistance and its strength at elevated temperatures. They can be commonly found in aerospace hot-end components, industrial gas turbines and specialised valve components (i.e. for viscous and large sediments).

Hot corrosion is a form of accelerated oxidation which affects alloys exposed to high temperature combustion gases containing small amounts of certain impurities.

Alloy 188 is a Cobalt-Nickel-Chromium-Tungsten based super-alloy. The alloy demonstrates a unique combination of high temperature strength, good oxidation resistance up to 1095°C, coupled with adequate ductility after prolonged exposure to 760°C - 870°C temperature range. Excellent resistance to sulphate deposit hot corrosion.

Alloy 188 is fabricated and welded making the alloy suitable for a wide variety of applications in the aerospace industry including: combustion cans, transition ducts, and after burner components.

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