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Alloy U520

Material

Alloy U520, Udimet® alloy 520

Note that Udimet® alloy 520 is a registered trade mark of Special Metals Corporation group of companies.
Overview

Alloy 520 is a precipitation hardenable nickel base superalloy with an exceptional combination of high-temperature mechanical properties, corrosion resistance and forgeability characteristics.
Application

Alloy 520 is developed for use in the 1400-1700°F (760-927°C) temperature range, the alloy has excellent structural stability and unusually good fabricability. The primary application for alloy 520 is blading for aircraft and land-based gas turbines. And sheets and bolts for industrial and marine use.

Microstructure

After the conventional heat treatments, Alloy 520 microstructure is composed of a Ni-Cr-Co (μ) rich matrix, which is hardened by fine (approximately 0.1-μm size) Ni3(Al, Ti) gamma prime (μ') precipitates. Grain boundaries are decorated by M23C6 carbides. Stringerlike primary MC carbides may also be present within the grains.

1000 hours rupture strength of precipitation hardened Alloy 520

Form	Size range
Capillary tube	OD 0.08 ~ 6.0 mm WT 0.015 ~ 1.5 mm
Thin wall & Ultra thin wall seamless tube	OD6.0 ~80.0 mm WT 0.05 ~4.5 mm
Micro ID and heavy thick wall seamless tube	OD3.0 ~50.0 mm ID 0.30 ~5.0 mm
Precision conic seamless tube	Bigger end: OD3.0 - 426.0mm Smaller end: OD2.5 - 346.0mm WT: 0.15 - 40.0mm
HP /UHP BA+ tube EP tube	OD 1.0 ~ 76 mm WT 0.10 ~ 10.0 mm
Small caliber precision seamless tube	OD6.0 ~89 mm WT 0.50 ~9.0 mm
Profiled seamless tube	Build to drawing Build to specification
Bourdon tube	Y40, Y50, Y60, Y70, Y100, Y150