C17200 Beryllium Copper Strip – High Tensile Strength ASTM B194 Compliant Precision Cold Rolled Alloy 25

C17200 Beryllium Copper Strip is the industry benchmark for applications demanding an optimal blend of ultra-high strength, exceptional fatigue resistance, and reliable electrical conductivity. As a precipitation-hardening copper alloy (commonly designated as Alloy 25 or UNS C17200), it delivers tensile strength exceeding 200 ksi (1380 MPa) after proper aging—comparable to that of heat-treated steel—while retaining superior corrosion resistance and non-magnetic properties. This C17200 Beryllium Copper Strip conforms strictly to ASTM B194 specifications and is available in various tempers (A, AT, H, HT, etc.) ranging from dead soft annealed to full hard mill hardened conditions. The cold rolled strip offers tight thickness tolerances down to ±0.005 mm, precise edge burr control, and excellent formability for blanking, stamping, and bending operations. For engineers specifying high-rel components in aerospace connectors, oilfield instrumentation, or automotive relay systems, the consistent microstructure and clean surface finish of this C17200 Beryllium Copper Strip ensure reliable performance under cyclic loading, stress relaxation resistance up to 200°C, and dimensional stability that is unmatched across the copper alloy family.

Standards & Conformance

C17200 Beryllium Copper Strip is manufactured and certified to meet the following internationally recognized standards:

• ASTM B194 — Standard Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar

• ASTM B196 — Standard Specification for Copper-Beryllium Alloy Rod and Bar

• AMS 4533 — Aerospace Material Specification for Beryllium Copper Alloy

• SAE J461 / J463 — Wrought and Cast Copper Alloys

• ISO 4137 — Wrought Copper-Beryllium Alloys

• RWMA Class IV — Resistance Welding Manufacturer‘s Association classification for high-strength electrode materials

Chemical Composition

The following table presents the nominal chemical composition limits for C17200 Beryllium Copper Strip:

Source references: NGK Berylco BERYLCO 25 chemical data; voestalpine BeCu Alloy 25 composition.

Mechanical Properties

The mechanical performance of C17200 Beryllium Copper Strip varies significantly by temper and heat treatment condition:

Data compiled from voestalpine AT/HT technical sheet; MatWeb TF00 temper data; eFunda mechanical properties.

Key Characteristics:

• Fatigue Strength (10⁷ cycles @ R.T.): 40 – 45 ksi (276 – 310 MPa) in aged condition

• Modulus of Elasticity (Tension): 125 – 130 GPa (18.1 – 18.9 × 10³ ksi)

• Poisson‘s Ratio: 0.30 – 0.34

• Shear Modulus: 50 GPa (7,250 ksi)

Physical Properties

The intrinsic physical parameters of C17200 Beryllium Copper Strip are summarized below:

Data sources: NGK Berylco physical data; AZoM UNS C17200 properties; Espimetals beryllium-copper data; Avivametals conductivity.

Key Selling Points by Region

Our C17200 Beryllium Copper Strip provides distinct value propositions for buyers across different global markets:

• South Asia & Southeast Asia (India, Vietnam, Thailand, Malaysia, Singapore) : Precision electronics and connector manufacturing hubs drive demand for C17200 Beryllium Copper Strip in mill-hardened tempers, with tight gauge control (±0.01 mm) for SIM card contacts, battery springs, and micro-switch blades. Buyers require mill test certificates (MTCs) validating chemical composition and >600 MPa tensile strength. Local importers benefit from JNPT port logistics.

• Middle East (UAE, Saudi Arabia, Kuwait, Qatar) : The oil and gas sector requires C17200 Beryllium Copper Strip for non-sparking safety tools, downhole MWD/LWD housings, drill bit bearings, and subsea actuator stems. Non-magnetic and non-galling properties prevent spark ignition in explosive atmospheres—critical for refinery maintenance and petrochemical plant tooling.

• Europe (Germany, France, UK, Italy, Spain, Poland) : European engineering demands C17200 Beryllium Copper Strip meeting RoHS and REACH compliance for automotive sensor contacts, EV battery connectors, and precision relay components. EU buyers prioritize sustainability data—carbon footprint reporting for C17200 production is available upon request.

• North & South America (USA, Canada, Mexico, Brazil) : Aerospace applications (AMS 4533) drive procurement of C17200 Beryllium Copper Strip in non-magnetic, high-fatigue configurations for aircraft instrumentation and landing gear components. U.S. domestic end-users require DFARS-compliant certified mill lots with full traceability.

• Africa (Nigeria, South Africa, Angola) : Mining and mineral processing operations specify C17200 Beryllium Copper Strip for heavy-equipment wear plates and non-sparking pumps, where abrasion resistance and corrosion resistance in acidic mine water are decisive factors. South African import controls require pre-shipment inspection—accommodated via third-party certification (SGS/BV).

• Global Maritime & Offshore : Seawater corrosion resistance comparable to nickel-silver makes C17200 Beryllium Copper Strip the material of choice for deep-sea ROV connector housings and offshore platform electrical panels. Hydrostatic pressure tolerance and zero susceptibility to hydrogen embrittlement ensure long service life in underwater environments.

Primary Applications

C17200 Beryllium Copper Strip serves mission-critical functions across the following industries and components:

References: NGK Berylco wear resistance and machining data; MatWeb TF00 temper applications; Avivametals typical uses.

Available Forms, Dimensions & Customization

C17200 Beryllium Copper Strip is available in the following specifications:

Reference: Hamilton Precision Metals (HPM) thickness range and tolerances.

Frequently Asked Questions (FAQ)

Q1: What is the difference between C17200 Beryllium Copper Strip in AT and HT tempers?

Both AT and HT are mill-hardened tempers for C17200 Beryllium Copper Strip, meaning the precipitation aging process is performed at the mill prior to shipment. AT temper is achieved through solution annealing followed by cold rolling and aging, offering a balance of high strength and moderate formability (typical elongation 4–10%). HT temper is solution annealed and fully aged without intermediate cold work, delivering the highest tensile strength (up to 220 ksi) with lower elongation (2–5%). For most connector and spring applications, AT temper provides an optimal strength-ductility tradeoff.

Q2: Is C17200 Beryllium Copper Strip magnetic?

No. C17200 Beryllium Copper Strip exhibits a magnetic permeability of <1.01, making it effectively non-magnetic. This property is critical for high-precision instruments such as MRI housings, aerospace gyroscopes, and naval navigation equipment where magnetic interference must be eliminated. Unlike ferromagnetic stainless steels (e.g., 300 series), C17200 shows no magnetic attraction increase even after extensive plastic deformation during forming operations.

Q3: How does temperature affect the performance of C17200 Beryllium Copper Strip?

C17200 Beryllium Copper Strip maintains stable properties up to 200°C (392°F). Above 200°C, gradual overaging begins, reducing tensile strength. The alloy exhibits excellent stress relaxation resistance—retaining >90% of initial contact force after 1,000 hours at 150°C—significantly outperforming phosphor bronze (C5191) or beryllium-nickel alloys. For continuous service above 250°C, consider C17510 or C17500 copper-cobalt-beryllium alloys.

Q4: What safety precautions are required when processing C17200 Beryllium Copper Strip?

C17200 Beryllium Copper Strip in its solid form poses no inhalation hazard. However, during grinding, sanding, polishing, welding, or machining that generates airborne dust or fumes, beryllium-containing particles may be released. Standard industrial hygiene practices must be followed: use local exhaust ventilation (LEV), wear P100 or HEPA-filtered respirators, and avoid dry sweeping of dust. Processors should comply with OSHA (29 CFR 1910.1000) and ACGIH TLV limits (0.05 μg/m³ for beryllium). Wet machining and HEPA vacuum cleanup are strongly recommended.

Q5: Can C17200 Beryllium Copper Strip be welded?

Yes. C17200 Beryllium Copper Strip can be joined using most standard techniques including TIG, MIG, resistance spot welding, soldering, and brazing. Key considerations: (a) for heat-treated tempers (AT/HT), local annealing in the heat-affected zone will occur—post-weld aging is recommended to restore full strength; (b) brazing temperatures must remain below 790°C (1450°F) and cycle time minimized to prevent overaging; (c) use AWS classification ERCuBe-A or ERCuBe-Al filler metals for best match in mechanical properties.

Q6: How does C17200 Beryllium Copper Strip compare to C17510 (CuNiBe) or C17300?

• C17200 (Alloy 25 – Be ~1.9%) : Highest strength (200 ksi+ tensile) with moderate conductivity (22% IACS). Best for spring and connector applications requiring maximum mechanical performance.

• C17300 (Alloy 25 with Pb) : Free-machining version of C17200 (lead addition ~0.5%). Same strength properties but reduced formability and significantly higher machinability (machinability rating increased from 20% to 60–70%). Preferred for automatic screw machine components.

• C17510 (CuNiBe – Be ~0.4%) : Lower strength (110–140 ksi tensile) but much higher electrical conductivity (45–60% IACS) and thermal conductivity (200+ W/m·K). Preferred for heat sinks, resistance welding electrodes, and high-current bus bars where thermal management is critical.

Q7: What standards apply to C17200 Beryllium Copper Strip for export to Europe?

For EU-compliant applications, C17200 Beryllium Copper Strip must meet REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) and RoHS (Restriction of Hazardous Substances) regulations. While beryllium is not currently restricted under RoHS, downstream users may require compliance verification. Mill test certificates (MTCs) according to EN 10204 3.1 are standard for EU-bound shipments. The alloy‘s European equivalent designation is CW101C (EN CuBe2).

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