UDIMET Alloy L-605 (UNS R30605)

Topics Covered

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

Introduction

UDIMET alloys are super alloys that have cobalt or nickel or iron as their base metal. Super alloys are high-performing alloys that are able to withstand high temperatures and mechanical stress. The hardening of super alloys is done by precipitation hardening, work hardening or solid solution hardening. UDIMET alloys 188, 250, 520, 720, L-605, R41 are some of the commercially available UDIMET alloys.

UDIMET alloy L-605 is an alloy with cobalt as the base metal, and nickel, chromium and tungsten as the other components. This alloy is solid strengthened and exhibits excellent resistance to oxidation, even at 1093°C (2000°F), sulfidation, wear and galling.

This datasheet will look into the chemical composition, properties and applications of UDIMET alloy L-605.

Chemical Composition

The chemical composition of UDIMET alloy L-605 is given in the following table.

Element Content (%)
Cobalt, Co 46.38-56.95
Chromium, Cr 19-21
Tungsten, W 14-16
Nickel, Ni 9-11
Iron, Fe ≤3
Others Remainder

Physical Properties

The following table discusses the physical properties of UDIMET alloy L-605.

Properties Metric Imperial
Density 9.27 gm/cm3 0.335 lb/in3

Mechanical Properties

The mechanical properties of UDIMET alloy L-605 are tabulated below.

Properties Metric Imperial
Tensile strength 994 MPa 144 ksi
Yield strength 466 MPa 67.6 ksi
Elongation at Break 50% 50%

Other Designations

Some of the other designations that are used to denote UDIMET alloy L-605 are as below:

  • UNS R30605
  • AMS 5537
  • AMS 5759
  • AMS 5796
  • AMS 5797

Fabrication

Machinability

Conventional machining techniques can be used on this alloy.

Welding

UDIMET alloy L-605 can be welded using common techniques. Welding methods such as shielded metal arc, gas tungsten arc and gas metal arc welding are best suited for UDIMET alloy L-605.

Hot Working

This alloy can be hot worked at temperature range of 1037-1260°C (1900-2300°F).

Cold working

Cold working may be done on the alloy. Cold working techniques such as bending, deep drawing and spinning may be performed easily on the alloy.

Annealing

UDIMET alloy L-605 is solution annealed at 1175°-1230°C (2150°F-2250°F) and rapidly cooled in air or by water-quenching.

Applications

The UDIMET alloy L-605 is used in the following applications:-

  • Gas turbine parts such as combustors, rings, blades
  • Industrial furnaces – muffles or kilns.

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