BeCu

BeCu, or copper-beryllium, denotes a family of copper alloys that contain beryllium as the primary alloying element, typically in the range of about 0.5 to 2.5 percent by weight, with the remainder copper. These alloys are strengthened by precipitation hardening (age hardening) after a suitable heat treatment, yielding a combination of high strength and good formability that is difficult to achieve in other copper alloys. The most widely used grade is often referred to as C17200, though other BeCu formulations exist that optimize different properties such as wear resistance or conductivity.

BeCu alloys are known for high strength, hardness, and excellent fatigue properties, while retaining appreciable electrical conductivity for a copper alloy. They are also non-magnetic and non-sparking, making them suitable for use in tools and components for hazardous environments. Their corrosion resistance is generally good in many atmospheres and they can maintain dimensional stability over a range of temperatures.

Common applications include high-strength springs, shock absorbers, electrical contacts and connectors, and non-sparking tools used in oil, gas, and petrochemical facilities, as well as aerospace and defense components where a combination of strength and reliability is required.

Safety: Beryllium compounds are highly toxic if inhaled; machining BeCu requires proper controls, dust/fume extraction, and personal protective equipment, along with regulated handling and disposal procedures.