C34500 High Leaded Brass is a free-machining brass alloy with a high lead content, known for its exceptional machinability, strength, and corrosion resistance, making it suitable for intricate components and parts in automotive, aerospace, and general engineering applications.
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When your CNC lathes scream for speed and complex parts demand buttery cuts, C34500 High Leaded Brass answers. This 64% copper alloy packs 3.5% lead – the 'sweet spot' for chip-breaking magic without gumming tools. RoHS-exempt under Annex III 6c, it’s the secret weapon for high-volume precision parts, from watch gears to hydraulic valves.
TECH SPECS: PRECISION BY THE NUMBERS
(ASTM B455 / UNS C34500 / RoHS Annex III Exempt)
| Property | C34500 Brass | C36000 Brass | Pb-Free Brass |
|---|---|---|---|
| Composition | 64% Cu, 32.5% Zn, 3.5% Pb | 62% Cu, 36% Zn, 3% Pb | 62% Cu, 37% Zn, 1% Si |
| Machinability | 5 star (95% vs. free-cutting) | 100% | 65% |
| Tensile Strength | 340 MPa | 310 MPa | 380 MPa |
| Surface Finish | Ra 0.2μm (mirror polish) | Ra 0.3μm | Ra 0.8μm |
| Chip Formation | Short, powdery | Stringy | Brittle flakes |
| Lead Content | 3.5% (RoHS 6c exempt) | 3% | 0% |
Certifications: ASTM B455. RoHS 3 Annex III Exemption 6c, REACH, DFARS
4 REASONS MACHINISTS DEMAND C34500
Hyper-Machining Speed
"Shreds through CNC operations at 300+ SFM – cuts cycle times by 25% vs. silicon brasses. Produces 10.000 watch gears per bar with ±0.005mm tolerance."
Self-Lubricating Magic
"Lead particles act like microscopic ball bearings – extends tool life 3X in brass fittings production."
RoHS-Exempt Compliance
"Fully documented for Annex III 6c exemption – passes EU/US regulations for non-potable industrial components."
Cost-Per-Chip Champion
"15% lower cost per part than specialty lead-free alloys while matching C36000’s finish quality."
KEY FEATURES: ENGINEERED FOR PRODUCTION
Chip Control: Lead-induced brittleness creates short, disposable chips (no bird-nesting)
Thermal Management: 80 W/m·K conductivity prevents workpiece warping during high-speed ops
Fatigue Resistance: Handles 50M+ cycles in solenoid cores without stress fracturing
Corrosion Resilience: Survives 100hr salt spray (ASTM B117) for marine-adjacent electronics
HOW WE FORGE PERFECTION
1 Alloy Precision
"64/32.5 Cu-Zn base vacuum-melted with 3.5% Pb – controlled dispersion for uniform chip control."
2 Continuous Casting
"Extruded into bars/rods at 700°C with ±0.03mm ovality – optimized for Swiss lathes."
3 Cold Drawing
"Finished to H02 (half-hard) or H04 (full-hard) tempers for burr-free machining."
4 Compliance Lockdown
"Every batch XRF-tested – downloadable RoHS exemption certs included."
WHERE IT DOMINATES INDUSTRY
| Industry | Critical Applications | Why C34500 Wins |
|---|---|---|
| Precision Engineering | Watch movements, micro-gears | Holds ±0.002mm tolerances during high-RPM cuts |
| Automotive | Fuel injector nozzles, sensor housings | Resists ethanol-blended fuels (ASTM D4814) |
| Industrial Valves | Ball valve seats, pressure fittings | Self-lubricating for 10.000+ cycle durability |
| Electronics | Connector pins, relay contacts | 25% IACS conductivity + EMI shielding |
| Consumer Goods | Zippers, luxury pen clips | Polishes to jewelry-grade luster (Ra 0.1μm) |
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