Alloy 188 Powder Description
Alloy 188 (UNS R30188) is a cobalt-based superalloy known for its exceptional high-temperature strength and oxidation resistance up to 1093°C. It retains good ductility even after extended exposure to high temperatures and demonstrates excellent resistance to sulfate-deposit hot corrosion. Alloy 188 is easy to fabricate and can be welded using various methods, including electron beam, gas tungsten arc, and resistance welding, both manually and automatically.
Stanford Advanced Materials is a global supplier with over 20 years of experience in manufacturing and providing high-quality Alloy 188 Powder.
Alloy 188 Powder Specifications
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Product Name
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Alloy 188 (UNS R30188) Powder
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Alloy Grade
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GH5188, H188
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Related Grades
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Composition
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Cr 20.0-24.0
Ni 20.0-24.0
Co Bal
W 13.0-16.0
La 0.02-0.12
B 0.015 max
C 0.05-0.015
Fe 3.0 max
Mn 1.25 max
Si 0.2-0.5
P 0.02 max
S 0.015 max
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Size Grades
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-105+45micron
-53+15micron
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ASTM
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/
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AMS Specification
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5608, 5801, 5772
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Alloy 188 Powder Applications
Alloy 188 Powder offers excellent forming and welding characteristics. It can be forged or hot-worked effectively by maintaining the material at 2150°F (1175°C) long enough to ensure uniform temperature throughout. Due to its good ductility, Alloy 188 is also easily formed through cold working, though it work-hardens rapidly, necessitating frequent intermediate annealing for complex shapes. All hot- or cold-worked parts should undergo annealing followed by rapid cooling to restore optimal properties.
Wrought Alloy 188 is typically supplied in the solution heat-treated condition unless specified otherwise. The standard solution heat treatment is performed at 2125-2175°F (1163-1191°C) with rapid cooling or water quenching to achieve optimal properties. Annealing at lower temperatures can lead to some carbide precipitation, which may alter the alloy's characteristics.
With its exceptional properties, Alloy 188 Powder is ideal for various aerospace applications. It is commonly used in military and commercial gas turbine engines for combustion cans, transition ducts, and afterburner parts.
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