"A Guide to Lead-free Solders" is a technical book that addresses the transition to lead-free soldering materials, a topic of increasing importance in the electronics industry. Given the strict regulations in Europe and Japan that compel companies to comply with lead-free standards, this book provides engineers and professionals with valuable information and resources. It covers the physical metallurgy of soldering technology and offers insights into various aspects such as surface coatings, solder paste, wetting, solidification, and mechanical behavior. Additionally, it discusses techniques for measuring and testing solder materials, presenting and comparing data on leaded and lead-free solders. The book aims to identify and close knowledge gaps to assist engineers in selecting suitable alloys to substitute SnPb alloys. It is an essential reference for anyone involved in the development and production of electronic products and looking to prepare for the challenges of lead-free technology.