UDIMET Alloy R41 (UNS N07041)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication
     Machinability
     Welding
     Forging
     Cold working
     Annealing
Applications

Introduction

The UDIMET alloy series are super alloys that have nickel or iron or cobalt as their base metal. Super alloys are known for their high-performance at extremely high temperatures or under high mechanical stress. Super alloys are subjected to special hardening techniques in order to achieve high performance at extreme conditions. Some of the commercially available UDIMET alloys are UDIMET alloys 188, 250, 520, 720, R41, L-605.

UDIMET alloy R41 is a super alloy with nickel as its base metal. This alloy is hardened by precipitation. Along with nickel, other metals like cobalt, chromium, aluminum, molybdenum are added to this alloy. The temperature-mechanical properties of this alloy are very high. It is also corrosion resistant and easily fabricated.

This datasheet will look into the chemical composition, properties and applications of UDIMET alloy R41.

Chemical Composition

The chemical composition of UDIMET alloy R41 is given in the following table.

Element Content (%)
Nickel, Ni 47.27-58.59
Chromium, Cr 18-20
Cobalt, Co 10-12
Molybdenum, Mo 9-10.5
Iron, Fe ≤5
Titanium, Ti 3-3.3
Aluminum, Al 1.4-1.8
Others remainder

Physical Properties

The following table discusses the physical properties of UDIMET alloy R41.

Properties Metric Imperial
Density 8.25 gm/cm3 0.298 lb/in3

Mechanical Properties

The mechanical properties of UDIMET alloy R41 are tabulated below.

Properties Metric Imperial
Poissons Ratio 0.31 0.31

Other Designations

Some of the other designations that are used to denote UDIMET alloy R41 are tabulated below:

AISI 683 AMS 5545 AMS 5712 AMS 5713 AMS 5800
DIN 2.4973 GE B50T44 GE B50T59 GE B50T94 GE B50TF109
GE B50TF11 GE B50TF110 GE B50TF210 GE B50TF59 GE B50TF75
GE B50TF76

UNS N07041







Fabrication

Machinability

Conventional machining techniques can be used on this alloy. This alloy work-hardens while machining.

Welding

UDIMET alloy R41 can be welded using common techniques, using a matching filler metal.

Forging

Forging can be carried out on the alloy at solution annealed condition.

Cold working

Cold working may be done on the alloy using standard tooling; use of soft die materials gives a better finish and minimizes galling.

Annealing

UDIMET alloy R41 is solution annealed at 1065°-1079°C (1950°F-1975°F) followed by air cooling.

Applications

The UDIMET alloy R41 is used in the following applications:-

  • Gas turbine parts
  • Aircraft parts
  • Land and marine applications
  • High temperature applications
  • Structural hardware.

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