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Alloy 172 Beryllium Copper

Sequoia Brass & Copper sells alloy 172 Beryllium copper. Beryllium copper (BeCu), also known as copper beryllium, beryllium bronze and spring copper, is a copper alloy with 0.53% beryllium and sometimes with other alloying elements. Beryllium copper combines high strength with non-magnetic and non-sparking qualities. It has excellent metalworking, forming and machining qualities. It has many specialized applications in tools for hazardous environments, musical instruments, precision measurement devices, bullets, and aerospace. Beryllium-containing alloys create an inhalation hazard during manufacturing due to their toxic properties.

BeCu Alloy 172 is a high-strength beryllium copper alloy made for plastics molding applications. BeCu Alloy 172 is widely used for injection molding tools or as cores and inserts in steel molds. When used in a steel mold it effectively cools hot spots, reducing or eliminating the need for cooling channels. Our copper meets ASTM B194 standards and is ideal for an array of applications and fabrication processes. Beryllium copper has excellent electrical and thermal conductivity. Beryllium copper comes in bar, plate, strip, rod, shapes, tube and wire.

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  Cu Al Be Co Si
Min/Max Rem .2 1.80 - 2.00 .20 min 0.2
Nominal 98.1 1.9
Joining Technique Suitability
Soldering Good
Brazing Good
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Good
Spot Weld Good
Seam Weld Fair
Butt Weld Fair
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Excellent
Forgeability Rating: 40
Machinability Rating: 20
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Common Fabrication Processes For
172 Beryllium Copper

Blanking, drawing, drilling, forming and bending, tapping, turning

Typical Uses

Spring connectors, current carrying, fuse clips, belleville washers, electrical switch and relay blades, navigational clips, contact bridges, connectors, relay parts, switch parts
Fasteners, washers, screws, bolts, roll pins, retaining rings, lock washers
Housings for instruments, springs, non sparking safety tools, shafts, pumps, springs, electrochemical, bushings, valve stems, flexible metal hose, bourdon tubes, wear plates on heavy equipment, bellows, diaphragms, welding rolling mill parts, bearings, valves, pump parts, spline shafts, tools
Firing pins