Aug 7 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Introduction
Arsenic is chemically very similar to phosphorus, and it rapidly oxidizes to arsenic oxide when heated. It is usually added to lead along with tin, tellurium, silver or bismuth to provide resistance to bending and creep.
Lead arsenic alloys acquire maximum hardness upon quenching. Subsequent storage of alloys at room temperature leads to softening as arsenic is precipitated.
The following datasheet will provide an overview of lead-tellurium alloy.
Chemical Composition
The chemical composition of lead-arsenic alloy is outlined in the following table.
|
Element |
Content (%) |
|
Lead, Pb |
99.6 |
|
Arsenic, As |
0.15 |
|
Bismuth, Bi |
0.10 |
|
Tin, Sn |
0.10 |
Physical Properties
The following table shows the physical properties of lead-arsenic alloy.
|
Properties |
Metric |
Imperial |
|
Density |
11.34 g/cm3 |
0.409 lb/in3 |
Mechanical Properties
The mechanical properties of lead-arsenic alloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
17.2 MPa |
2490 psi |
|
Modulus of elasticity |
14 GPa |
2030 ksi |
|
Elongation at break |
40% |
40% |
Thermal Properties
The thermal properties of lead-arsenic alloy are given in the following table
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
29.1 µm/m°C |
16.2 µin/in°F |
|
Thermal conductivity |
33 W/mK |
229 BTU.in/hrft².°F |
Applications
The following are the list of applications of lead-arsenic alloy:
-
Cable sheathing
-
Radiation protection application
-
Additive in antimonial lead used in storage battery grids and water pipes.