Lead-Arsenic Alloy (UNS L50300–L50399)

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.

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