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If you’re in the electronics or auto parts industry, you know how critical material selection is for elastic components! Regular copper alloys are soft and prone to deformation after a few uses — but our C5191 phosphor bronze sheet/strip is formulated with precisely calibrated tin and phosphorus content, delivering maximum hardness paired with long-lasting elasticity.
It can be rolled as thin as 0.05mm (about the thickness of a human hair) yet withstands tens of thousands of repeated bends without deformation. At the other end of the spectrum, it’s available in thicknesses up to 10mm — tough enough for use as mold inserts. Whether you’re manufacturing precision gaskets for smartphones or connectors for automotive systems, C5191 is the go-to choice. It’s fatigue-resistant, corrosion-resistant, and far more durable than standard copper alloys.
| Category | Details |
|---|---|
| Core Composition | Cu: 88-90%, Sn: 5-6%, P: 0.03-0.35%; Total impurities ≤ 0.2%; Complies with JIS H3130-2015 standard; Stable mechanical properties and long-lasting elasticity |
| Thickness Specifications | Strip: 0.05mm - 1.5mm; Sheet: 1.5mm - 10mm; Custom width (5mm - 600mm) with slitting, flattening, and stamping services; Thickness tolerance controlled within ±0.005mm |
| Key Properties | High hardness (HV 180-250), excellent elasticity, superior fatigue resistance; Better corrosion resistance than regular copper; Excellent formability for complex stamping without deformation; Good electrical conductivity (approx. 20-30% IACS) |
| Core Applications | Ultra-thin strip (0.05-0.1mm): Precision gaskets, electronic connectors, sensor contacts, watch componentsMedium-thick strip (0.1-1.5mm): Automotive connectors, relay shrapnel, instrument springsThick sheet (1.5-10mm): Wear-resistant mold inserts, marine parts, mechanical transmission components |
FAQ
Q: Can C5191 phosphor bronze sheet/strip undergo surface treatments like nickel plating or zinc plating?
A: Absolutely! C5191 has strong surface adhesion, making it ideal for nickel plating, zinc plating, passivation, and other surface treatments. Nickel plating boosts wear resistance and conductivity, while zinc plating enhances corrosion protection — perfect for humid environments. We also offer professional surface treatment services, so you can receive ready-to-use parts directly.
Q: Are there any discounts for bulk purchases of C5191 phosphor bronze sheet/strip? Can I get free samples?
A: Yes! Orders of 50kg or more qualify for wholesale pricing; orders over 100kg get an extra 5% unit price discount. For long-term customers with quarterly purchases exceeding 500kg, an additional 3% rebate applies. We also provide free 50mm×50mm samples for each specification — check the quality before placing bulk orders, no strings attached!
Q: Which has better electrical conductivity, C5191 phosphor bronze or pure copper?
A: Objectively speaking, pure copper has far better conductivity (over 100% IACS) than C5191 (only 20-30% IACS). However, C5191’s strengths lie in its high hardness and excellent elasticity, making it perfect for elastic components. Pure copper is better suited for conductive or heat-dissipating parts. Choose the material based on your specific application needs.
Next: 0.05-10mm C5210 Phosphor Bronze Strip/Sheet | High Elasticity & Wear Resistance
