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C17200 and C17300 are both copper-based alloys strengthened by beryllium addition. C17300 has a higher beryllium content, delivering superior hardness and strength after heat treatment. With a thickness range of 0.03–2.0mm, it covers applications from ultra-thin shrapnel to medium-thick mold components.
For high-frequency stress-bearing parts like mold inserts, punches, and wear-resistant blocks, regular steel wears out quickly — but beryllium copper is a game-changer. After heat treatment, C17200/C17300 achieves a hardness of 38–42HRC, outperforming ordinary mold steel in wear resistance. Its excellent thermal conductivity enables rapid heat dissipation, preventing mold deformation caused by high temperatures. For example, plastic mold cores made of 2.0mm thick C17300 beryllium copper sheet see a 2–3 times longer service life.
Ultra-thin C17200 beryllium copper strip (0.03–0.1mm) is the top choice for mobile phone button shrapnel, connector contacts, and relay reeds, which demand exceptional elasticity and conductivity. It boasts an ultra-high elastic limit, withstanding tens of thousands of repeated presses without failure, and a conductivity of 45–55% IACS for zero-latency signal transmission. Digital accessory manufacturers using it for Type-C port shrapnel have reduced product defect rates to below 0.1%.
| Element | C17200 Content Range | C17300 Content Range | Core Function |
|---|---|---|---|
| Copper (Cu) | Balance | Balance | Base material ensuring electrical conductivity and machinability; resists cracking during bending and stamping |
| Beryllium (Be) | 1.8-2.1% | 2.4-2.7% | The "performance core" of beryllium copper; delivers maximum hardness after heat treatment, several times harder than ordinary copper |
| Cobalt (Co) | ≤0.2% | 0.3-0.6% | Assists in enhancing strength and heat resistance; maintains stable performance in high-temperature environments |
| Nickel (Ni) | ≤0.2% | ≤0.2% | Refines grain structure for uniform internal material composition; prevents localized brittle fracture |
| Iron (Fe) | ≤0.15% | ≤0.15% | Controls impurity content to ensure stable elasticity and wear resistance |
| Lead (Pb) | ≤0.005% | ≤0.005% | Lead-free and eco-friendly, compliant with RoHS standards; safe for use in electronics and medical products |
FAQ
Q: What’s the difference between C17200 and C17300 beryllium copper? How to choose?
A: C17200 focuses on high strength and wear resistance, ideal for heavy-load applications like mold inserts and aerospace components. C17300 excels in elasticity and fatigue resistance, making it the priority choice for connector reeds, precision springs, sensors, and other parts requiring frequent deformation. If unsure, select based on your actual strength or elasticity requirements, or contact us for sample testing.
Q: Is the quality of 0.03mm ultra-thin beryllium copper strip guaranteed?
A: Absolutely! Produced via high-precision cold rolling and inspected with ultrasonic flaw detection, our ultra-thin strips are free of blowholes and cracks, with a surface roughness of Ra≤0.1μm. After aging treatment, they maintain excellent elasticity and toughness without brittleness or deformation. They are already in mass application in high-end electronic products like foldable smartphones and smart watches.
Q: Can this beryllium copper strip/sheet be used in outdoor or corrosive environments?
A: Yes! It offers exceptional corrosion resistance, performing stably in marine environments, chemical media, and high-temperature/high-pressure conditions, with minimal surface oxidation or rusting. Parts like connectors for outdoor communication equipment and components for marine engineering made from it see significantly extended service life — no complex anti-corrosion treatment required.
Q: Is technical support available after purchase? Do you accept small orders?
A: Yes! We provide full-process technical support for orders of any size, including heat treatment process guidance and machining parameter recommendations, with 24-hour after-sales response to resolve issues. Small orders are welcome — customizations start at just 5kg. Value-added services like slitting for special specifications and surface treatment are also available. Bulk purchases qualify for preferential pricing.
Q: Are there any safety precautions for using beryllium copper materials?
A: Finished parts pose minimal risk during normal use. However, machining processes (e.g., cutting, grinding, welding) may generate dust or fumes — beryllium and its compounds are toxic. Proper protection is essential: wear P100-rated respirators and protective clothing, ensure good ventilation in the work area, and strictly prohibit eating, drinking, or smoking on-site. Waste material disposal must comply with hazardous substance regulations.
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