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DP2781 Alloy 188 Powder (UNS R30188)

Catalog No.DP2781
AppearanceGray metallic powder
GradeGH5188, H188

TFM offers Alloy 188 powder (UNS R30188) specifically designed for 3D printing applications. As the field of additive manufacturing evolves, TFM is committed to expanding its range of powders to meet the growing needs of the industry.

Alloy 188 Powder Description

Alloy 188, a cobalt-based superalloy (UNS R30188), is renowned for its exceptional high-temperature strength and oxidation resistance, withstanding temperatures up to 1093°C. Its properties include impressive post-aging performance and maintained ductility even after extended exposure to high heat. Additionally, Alloy 188 exhibits significant resistance to sulfate-deposit hot corrosion.

This superalloy is highly versatile in fabrication, easily welded through various methods including manual and automated processes such as electron beam, gas tungsten arc, and resistance welding.

TFM is a leading global provider of high-quality Alloy 188 powder, backed by over twenty years of expertise in its production and distribution.

Alloy 188 Powder Specifications

Product NameAlloy 188 (UNS R30188) Powder
Alloy GradeGH5188, H188
Related Grades/
CompositionCr 20.0-24.0
Ni 20.0-24.0
Co Bal
W 13.0-16.0
La 0.02-0.12
B 0.015 maxC 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
Size Grades-105+45micron

-53+15micron

ASTM/
AMS Specification5608, 5801, 5772

Alloy 188 Powder Applications

Alloy 188 powder is known for its excellent forming and welding attributes. This superalloy can be forged or hot-worked effectively when held at a temperature of 2150°F (1175°C) long enough to ensure uniform heating throughout the material. Its ductility also allows for straightforward cold working, though the alloy work-hardens quickly. Therefore, for complex component fabrication, frequent intermediate annealing is often required to maintain formability.

Whether subjected to hot or cold working, parts made from Alloy 188 should be annealed and rapidly cooled to achieve the best balance of mechanical properties. Typically, wrought Alloy 188 is supplied in a solution heat-treated condition. The standard heat treatment involves heating the alloy to a range of 2125-2175°F (1163-1191°C) followed by rapid cooling or water quenching to optimize its characteristics. Note that annealing at temperatures lower than the solution heat-treating range may lead to carbide precipitation, potentially altering the alloy’s properties.

Due to its advantageous properties, Alloy 188 powder is highly suitable for various aerospace applications. It is commonly used in both military and commercial gas turbine engines, particularly in components such as combustion cans, transition ducts, and afterburner parts.

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FAQ

  • Metal powders are fine particles of metals produced through various processes such as atomization, reduction, or electrolysis. They are used in applications like additive manufacturing, powder metallurgy, and coatings.

  • Alloy powders consist of two or more metallic elements combined to enhance properties like strength, corrosion resistance, and ductility, whereas pure metal powders contain only a single element.

  • The shape affects flowability, packing density, and spreadability. Spherical particles are preferred in additive manufacturing due to their superior flow characteristics.

  • Spherical powders are typically produced using gas atomization, where molten metal is atomized into fine droplets that solidify into spherical shapes.

  • Spherical powders offer better flowability and packing density, leading to improved layer uniformity and mechanical properties in 3D-printed components.

  • Factors include particle size distribution, shape, chemical composition, purity, and production method.

  • Yes, metal powders can pose hazards such as toxicity, reactivity, combustibility, and instability. Proper handling, storage, and safety protocols are essential.

  • In powder metallurgy, metal powders are compacted and sintered to produce components with complex shapes and tailored properties, often with minimal waste.

  • Yes, unused or excess metal powders from manufacturing processes can often be collected, sieved, and reused, provided they meet quality standards.

  • The combination of different metals in alloy powders can enhance properties such as strength, hardness, corrosion resistance, and thermal stability, depending on the application requirements.

  • Spherical alloy powders are used in aerospace, automotive, medical implants, and tooling industries for manufacturing high-performance components via additive manufacturing and powder metallurgy.

Production methods like gas atomization, water atomization, and mechanical milling influence particle size, shape, and purity, which in turn affect the performance of the powders in various applications.

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