Effect of Replacement of Lead by Tin on The Properties of Yellow Brass (Cu-Zn) alloy

Document Type : Original Article

Authors

1 Central Metallurigical R&D Institute, Helwan, Cairo, Egypt

2 Chemistry Department, Faculty of Science, Benha University, Benha, Egypt

3 Arab Valves Company, 10th of Ramadan City, Egypt

Abstract

Brass alloys are widely used as industrial material because of their excellent characteristics such as high 
corrosion resistance, excellent electrical and thermal conductivities, and good machinability. In particular, machinable 
brass is obtained by adding lead. It is, however, necessary to reduce the use of lead from a view point from the hazardous 
effects on the environment and humans. The effect of replacement of toxic lead (Pb) in conventional brass alloy, with tin 
(Sn) has been investigated. Two brass alloys with copper content (~59) wt% were laboratory made, chemical 
compositions, microstructure of surfaces were characterized by optical microscope. Hardness, machinability, and 
compression test have also been studied. The experimental studies provided that high tin contents are responsible for 
eutectoid structure with the formation of a hard phase γ (Sn) improves hardness to the maximum and rise up elastic 
modulus and maximum stress than leaded brass. Fine crumbles and spiral chips swarf produced during machinability of 
leaded and tin brasses respectively.

Keywords

Journal of Basic and Environmental Sciences
Volume 3, Issue 4
October 2016
Pages 107-111

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