Product
Product Details
C33000 Brass Forgings | Low-Leaded Brass | UNS C33000
C33000 Brass Forgings | Low-Leaded Brass | UNS C33000
C33000 (UNS C33000) — Low-Leaded Brass — is a 66% copper alpha-brass with minimal lead content (0.25–0.7%), providing the best corrosion resistance of any leaded brass while still retaining moderate machinability benefit from the small lead addition. C33000’s high copper content gives it excellent resistance to dezincification, season cracking (stress corrosion cracking), and general atmospheric and liquid corrosion. C33000 is produced as forged blanks for applications requiring superior corrosion resistance: outdoor hardware, marine environment hardware, chemical industry fittings, and components exposed to aggressive water or humid atmospheres. The low lead content also makes C33000 more suitable for applications where lead leaching is a concern, though it is NOT lead-free (for truly lead-free specify C69300 or C87850). Specified per ASTM B453 and ASTM B124.
C33000 Chemical Composition
| Element | Cu | Zn | Pb | Fe |
|---|---|---|---|---|
| C33000 (ASTM) | 65.0–68.0% | Balance (~33%) | 0.25–0.70% | max 0.07% |
| C34000 (comparison) | 63.0–66.0% | Balance | 0.8–1.5% | max 0.15% |
International Equivalents – C33000 Low-Leaded Brass
| Standard | Designation | Region |
|---|---|---|
| ASTM B453 / B124 | C33000 (Low-Leaded Brass) | USA |
| EN 12167 | CW505L (CuZn35, nearest) | Europe |
| BS 2874 | CZ107 / CZ108 (nearest) | UK |
| IS 319 | 70/30 variant | India |
| DIN 17660 | CuZn33 | Germany |
Mechanical Properties – C33000 Forgings
| Property | Value |
|---|---|
| Tensile Strength (UTS) | 300–370 MPa |
| Yield Strength (0.2%) | 90–145 MPa |
| Elongation | 35–55% |
| Hardness | 50–75 HRB |
| Machinability | 60–70% (lower lead content) |
| Density | 8.52 g/cm³ |
| Corrosion Resistance | Excellent — highest of leaded brasses |
Applications of C33000 Forged Blanks
C33000’s superior corrosion resistance makes it suitable for: outdoor architectural hardware in coastal or polluted urban environments; hardware components exposed to humid or mildly corrosive atmospheres; chemical plant instrument fittings in mildly aggressive service; marine environment deck hardware where cost is a factor versus naval brass; radiator and heat exchanger fitting bodies; clock and watch brass components (traditional use); bullet casings and cartridge components (traditional use); and battery clamps and automotive electrical hardware where corrosion resistance is critical. C33000 is the most corrosion-resistant of the leaded brasses and is chosen when service life in corrosive environments outweighs the machining productivity advantage of higher-lead alloys.
- Outdoor architectural hardware: coastal building fittings, garden hardware
- Marine environment: deck fittings, navigation equipment housings, boat hardware
- Chemical plant: instrument connection bodies, gauge fittings in mild corrosives
- Automotive: battery terminal clamps, electrical connector bodies, radiator fittings
- Traditional: bullet casings, cartridge cases, horological components
- Electrical: terminal blocks, earthing clamps, lightning protection fittings
Pricing
Indicative Price: US$ 13.30 per kilogram (CIF). EN 10204 3.1 material test certificates. Contact us for RFQ with drawing or sample.
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See also: Brass Forging Parts Overview | C34000 Medium-Leaded Brass | CW602N DZR Brass | CW617N Forging Brass