Jul 9 2013
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.