Description

UDIMET® alloy R41 (UNS N07041)

Table 1 – Limiting Chemical Composition, %

 

significant amounts of cobalt and molybdenum, along with lesser amounts of aluminum and titanium. Alloy R41 exhibits extremely high room and elevated temperature mechanical properties. Excellent corrosion resistance and fabricability have led to wide usage in critical aircraft engine components such as nozzle partitions, turbine blades and wheels, combustion chamber liners and structural hardware.

Chromium………………………………………………………. 18.0-20.0

Cobalt……………………………………………………………. 10.0-12.0

Molybdenum……………………………………………………… 9.0-10.5

Aluminum……………………………………………………….. 1.40-1.80

Titanium…………………………………………………………….. 3.0-3.3

Iron…………………………………………………………………. 5.0 max.

Boron………………………………………………………….. 0.003-0.010

Carbon………………………………………………………….. 0.12 max.

Nickel……………………………………………………………… Balance*

 

 

 

Typical Mechanical Properties

Table 3 – 1000-Hour Rupture Strength of Precipitation- Hardened UDIMET alloy R41

*Reference to the ‘balance’ of a composition does not guarantee this is exclusively of the element mentioned but that it predominates and others are present only in minimal quantities.

 

Physical Constants

Table 2 – Physical Constants

Temperature Rupture Strength °F °C ksi MPa 1200 649 102 705 1300 704 80 550 1400 760 50 345 1500 816 29 200 1600 871 17 117 1700 927 11 76

Density, lb/in³……………………………………………………….. 0.298

g/cm³…………………………………………………………. 8.25

Melting Range, °F………………………………………….. 2250-2535

°C………………………………………….. 1232-1391

Specific Heat, Btu/lb•°F…………………………………………. 0.104

J/kg•°K……………………………………………… 435

Coefficient of Expansion, 70-200°F, 10^-6 in/in•°F…………. 6.63

21-93°C, µm/m•°C……………… 11.9

Thermal Conductivity, Btu•in/ft²•h•°F…………………………… 62

W/m•°C……………………………………. 9.0

 

 

Available Products and Specifications

UDIMET alloy R41 is designated UNS N07041 and is available as forging billet, bar, sheet and plate.

 

Major specifications: AMS 5545

AMS 5712

AMS 5713

 

 

Figure 1. Typical mechanical properties of precipitation-hardened UDIMET alloy R41

 

Publication Number SMC-108 Copyright © Special Metals Corporation, 2004 (Sept 04)

 

UDIMET is a trademark of the Special Metals Corporation group of companies.