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Engineers and makers who need a metal that combines electrical conductivity with spring-like resilience often hit a wall with standard copper or brass. C17200 beryllium copper sheet stock is the go-to solution for contact springs, precision tooling, and non-sparking fixtures — available here in cut-to-size flat plates ready for your next build.
Each piece is machined from C17200 BeCu alloy (UNS C17200), a copper-beryllium composition delivering tensile strength typically in the range of 1,100–1,400 MPa in the age-hardened condition. Sheets are available in widths of 100 mm (~3.94 in) or 200 mm (~7.87 in), lengths of 100 mm (~3.94 in) or 200 mm (~7.87 in), and thicknesses ranging from 0.5 mm (~0.020 in) to 5.0 mm (~0.197 in). Surfaces are flat-rolled with a smooth mill finish.
Typical use cases include electrical contact spring blanks for relay and switch assemblies, non-sparking tooling inserts for hazardous-environment maintenance, and precision shim stock for aerospace and semiconductor fixture alignment — all applications where beryllium copper flat stock outperforms standard alloys.
C17200 BeCu achieves tensile strength of 1,100–1,400 MPa after age hardening, making it ideal for contact springs and snap-action components that must retain shape under repeated deflection.
Electrical conductivity of approximately 22–28% IACS — far superior to most spring steels — enabling use in live electrical contacts, bus bars, and conductive shims without sacrificing mechanical performance.
The copper-beryllium matrix resists oxidation, salt spray, and many industrial chemicals, extending service life in humid, marine, or chemically active environments.
Certified non-sparking and non-magnetic, making BeCu flat stock the material of choice for tools and fixtures used near flammable gases, fuels, or sensitive electronic equipment.
Choose from 18 size combinations — 100×100 mm to 200×200 mm footprints, thicknesses from 0.5 mm to 5.0 mm — so you get the exact blank you need without paying for excess material.
Flat-rolled mill surface provides consistent thickness tolerance and a clean starting face for CNC routing, wire EDM, stamping, or hand filing without additional surface prep.
| Alloy Designation | C17200 (UNS C17200 / CuBe2) |
|---|---|
| Material | Beryllium Copper (BeCu) |
| Beryllium Content | Approximately 1.8–2.0 wt% |
| Temper / Condition | See variant options (typically mill-hardened or solution-annealed) |
| Tensile Strength (age-hardened) | Typically 1,100–1,400 MPa (160–200 ksi) |
| Electrical Conductivity | Approximately 22–28% IACS |
| Thermal Conductivity | Approximately 105–130 W/m·K |
| Density | Approximately 8.25 g/cm³ (0.298 lb/in³) |
| Width Options | 100 mm (~3.94 in) / 200 mm (~7.87 in) |
| Length Options | 100 mm (~3.94 in) / 200 mm (~7.87 in) |
| Thickness Range | 0.5 mm – 5.0 mm (0.020 in – 0.197 in) |
| Surface Finish | Flat-rolled mill finish |
| Applicable Standards | ASTM B194 / AMS 4530 (reference) |
| Magnetic Properties | Non-magnetic |
| Spark Characteristics | Non-sparking |
| Item Form | Flat plate / sheet stock |
For electrical contact springs and thin shims, 0.5–1.0 mm is typically sufficient. For structural brackets, tooling inserts, or components requiring higher rigidity, 1.5–3.0 mm is common. Heavy-duty non-sparking tool blanks often use 5.0 mm stock. Select your Width×Length×Thickness combination from the variant dropdown above.
In the age-hardened condition, C17200 BeCu achieves tensile strength of 1,100–1,400 MPa, which is comparable to many grades of hardened stainless steel. Its key advantage over stainless is its combination of high strength and electrical conductivity — stainless steel is a poor conductor, while BeCu excels in both properties simultaneously.
C17200 BeCu has good resistance to atmospheric corrosion, salt spray, and many industrial chemicals due to its copper-rich matrix. In highly aggressive environments (strong acids, ammonia), a protective coating is recommended. For most indoor and light outdoor applications, the material performs reliably without additional treatment.
Yes. In the solution-annealed (soft) condition, C17200 BeCu machines similarly to medium-hard brass and can be cut with carbide or HSS tooling, sheared, punched, or wire-EDM'd. After age hardening, machinability decreases, so it is best to perform major cutting operations before the final heat treatment cycle.
Solid BeCu sheet stock is safe to handle with bare hands. The health risk associated with beryllium arises from inhalation of fine dust or fumes generated during grinding, sanding, or welding. Always use appropriate respiratory protection (P100 respirator), local exhaust ventilation, and follow applicable occupational safety regulations when machining or finishing BeCu.
Order the smallest standard blank that fully contains your finished part dimensions, leaving adequate material for fixturing and finishing cuts. For example, if your finished part is 85×85 mm, the 100×100 mm blank is the correct starting size. If your part is 150×90 mm, choose the 200×100 mm blank.
Yes. C17200 BeCu can be soldered with standard tin-lead or lead-free solders and brazed with silver-based filler alloys. Flux selection is important — use a flux rated for copper alloys. Avoid prolonged high-temperature exposure that could alter the age-hardened temper; perform heat treatment after any brazing operation if maximum strength is required.
