Aug 6 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication
Machinability
Welding
Cold Working
Applications
Introduction
WHA alloys, known by the trade name Densalloys, are classified based on their magnetic permeability, those having magnetic permeability less than 1.05 and those having magnetic permeability greater than 1.05. There are totally four classes of WHA alloys, in which classes 1, 2 and 3 contain one grade of magnetic and one non-magnetic alloy. Class 4 consists of only magnetic alloys.
DENS23 is a WHA alloy belonging to Class 2 with a magnetic permeability of 1.02-1.05. This alloy exhibits low magnetic permeability and hence is non-magnetic in nature. Densalloys exhibit better ductility and machinability than pure tungsten. The tungsten content of this alloy varied from 89-97%, the remainder being nickel or iron. The standard forms in which the alloy is available are sheet, plate, pressed and sintered billet and sintered near net shape.
This datasheet will look into the chemical composition, properties and applications of Densalloy-DENS23.
Chemical Composition
The chemical composition of Densalloy DENS23 is given in the following table.
|
Element |
Content (%) |
|
Tungsten, W |
92.5 |
|
Nickel, Ni |
5 |
|
Copper, Cu |
2.5 |
Physical Properties
The following table discusses the physical properties of Densalloy DENS23.
|
Properties |
Metric |
Imperial |
|
Density |
17.66 gm/cm3 |
0.638 lb/in3 |
Mechanical Properties
The mechanical properties of Densalloy DENS23 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Tensile strength(annealed) |
758 MPa |
110 ksi |
|
Yield strength(annealed) |
551 MPa |
80 ksi |
|
Elongation at Break (1 inch (2.5 cm) gauge length) |
2% |
2% |
|
Hardness, Rockwell C |
≤33 |
≤33 |
Other Designations
Some of the designations used to denote Densalloy DENS23 are listed below:
-
MIL-T-21014D
-
ASTN B777-87
-
AMS-7725B
Fabrication
Machinability
DENS23 alloy is easily machinable into complex geometrical shapes using common metal cutting and shaping tools.
Welding
These alloys cannot be welded due to the vast difference in the welding and binder phase.
Cold Working
This alloy can be cold worked by the process of swaging.
Applications
Densalloy DENS23 is used in the following applications:-
-
Radiation shielding
-
Aircraft counter balances
-
Racing weights
-
Boring bars
-
Ordnance applications
-
Well lodging.