C510 Phosphor Bronze alloy possesses a higher yield strength than is readily available in most cast products. Typical applications for phosphor bronze include bearings, bushings, gears, pinions, shafts, thrust washers, and valve parts. C51000 Phosphor bronze can be readily brazed or soldered. The capacity for being cold worked is good.
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(UNS C51000 | ASTM B139 | SAE CA510 | ISO 427)
94% Cu, 5% Sn, 0.2% P • Spring Resilience Champion • Precision Electrical & Industrial Alloy
Product Overview: The Enduring Performer
When TE Connectivity manufactures 10 million connector springs or Emerson designs industrial valves, they rely on C51000 Phosphor Bronze '5% A'. This industry-standard alloy offers unbeatable spring elasticity at 35% lower cost than beryllium copper, resists corrosion in harsh environments, and meets RoHS compliance for global markets. It’s why ISO 9001-certified factories trust it for components demanding zero relaxation over 100.000+ cycles.
Technical Parameters
| Property | C51000 '5% A' | C54400 (Leaded) | C52100 (8% Sn) |
|---|---|---|---|
| Composition | Cu 93.5–95.5% | Cu 86–89% | Cu 91.5–92.5% |
| Sn 4.2–5.8% | Sn 3.5–4.5% | Sn 7.5–8.5% | |
| P 0.03–0.35% | Pb 3.5–4.5% | P 0.10–0.25% | |
| Tensile Strength | 585 MPa | 520 MPa | 690 MPa |
| Fatigue Strength | 210 MPa | 240 MPa | 320 MPa |
| Electrical Conductivity | 22% IACS | 20% IACS | 15% IACS |
| Machinability | 60% | 85% | 50% |
| Corrosion Resistance | Class A+ | Class A | Class A+ |
Certifications: ASTM B139. RoHS 3 Compliant (Pb-Free), REACH, UL ECVP, ISO 6892-1
3 Competitive Advantages
Superior Electrical Performance
22% IACS conductivity ensures minimal signal loss in connectors (tested per IEC 60512).
Stress Relaxation Resistance
<15% load loss after 1.000hrs at 100°C – outperforms brass by 300%.
Corrosion Immunity
Zero dezincification after 1.500hrs salt spray (ASTM B117) – ideal for marine hardware.
Critical Engineering Features
Spring Elasticity: 30% higher yield strength than brass (380 MPa vs. 250 MPa)
Thermal Stability: Maintains properties from -50°C to 180°C
Anti-Galling: 0.05 friction coefficient against stainless steel
Formability: 180° bend capability in spring temper (H08) without cracking
Precision Manufacturing Process
1 Induction Melting
95% recycled copper + virgin tin → O₂-controlled furnace.
2 Continuous Casting
1.100°C → water-cooled rolls for 8mm thick slab.
3 Cold Rolling
75% reduction to achieve Spring Temper (H08).
4 Bright Annealing
450°C in nitrogen atmosphere → oxide-free finish.
5 Slitting/Edging
Laser-guided cutting to ±0.01mm tolerance.
Core Applications
| Industry | Key Components | Compliance Standards |
|---|---|---|
| Electronics | Connector pins, relay springs | IEC 60512. IPC-4552A |
| Automotive | ABS sensor springs, fuel injectors | IATF 16949. SAE J461 |
| Industrial | Valve springs, pump diaphragms | ISO 9001. ASME B16.34 |
| Marine | Deck hardware, navigational contacts | ASTM B117. DNVGL-CG-0059 |
| Consumer Goods | Lock washers, zipper sliders | CPSIA, FDA CFR 21 (indirect food contact) |
Top Search Keywords:
C51000 phosphor bronze price | 5% tin bronze strip | Electrical connector bronze | ASTM B139 spring stock
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