Materion BeCu is divided into two categories:

High-Strength Alloys:

Brush Alloy 25:

The most commonly specified BeCu. In terms of age hardening, Alloy 25 achieves the highest strength and hardness among commercial copper alloys. Ultimate tensile strength can exceed 140 kg/mm², with hardness around Rockwell C45. In a fully aged condition, the minimum conductivity is 22% IACS.

Brush Alloy 190:

A mill-hardened strip. Before shipment, the strip is age-hardened at the Brush facility to a specified strength range. Its chemistry is similar to Alloy 25. Alloy 190 reaches a maximum tensile strength of 133 kg/mm² and a Rockwell hardness up to C42. Reduced age-hardening requirements lower production cost.

Brush Alloy 290:

A strip age-hardened at the Brush facility prior to shipment. Comparable to Alloy 190 in composition and strength, but with improved formability. It offers good formability and high strength, replacing post-age-hardened Alloy 25 products to enhance manufacturability and reduce cost.

Brush Alloy M25 Rods:

Combines the strength characteristics of Alloy 25 with excellent machinability. M25 rod and wire contain a small amount of Pb (0.6% max.), suitable for automatic lathes; Pb promotes fine chips and prolongs tool life.

High-Conductivity Alloys:

Brush Alloy 174 and Brush 60:

Offer a high-conductivity, high-strength option for components, outperforming phosphor bronze and brass, especially when designs emphasize conductivity and resistance to stress relaxation. Yield strength can reach 88 kg/mm²—higher than typical phosphor bronze, silicon bronze, and Cu–Ni–Sn alloys. Conductivity is over five times that of these alloys, with stable stress-relaxation resistance.

Brush 60:

Provide an excellent combination of modulus/strength, formability, and conductivity. Both alloys are supplied as mill-hardened strip.