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C46400 Brass Forgings | Naval Brass | UNS C46400 Tin Brass
C46400 Brass Forgings | Naval Brass | UNS C46400
C46400 (UNS C46400), universally known as Naval Brass or Uninhibited Naval Brass, is a 60-40 brass alloy with a 0.75% tin addition that significantly improves corrosion resistance in seawater and marine environments compared to standard 60-40 brass. The tin acts as a dezincification inhibitor in mildly corrosive marine environments. With its hot-working alpha-beta structure, C46400 is well-suited to closed-die hot forging, producing seacock bodies, sea valve bodies, marine fittings, marine pump housings, propeller shaft components, and other components exposed to seawater. C46400 is specified per ASTM B124 (forging rod) and ASTM B283 (die forgings) and is the standard alloy for marine brass forgings in North American shipbuilding and offshore applications. EN equivalent is CW712R (CuZn36Sn1Pb).
C46400 Chemical Composition
| Element | Cu | Zn | Sn (Tin) | Pb | Fe |
|---|---|---|---|---|---|
| C46400 (ASTM) | 59.0–62.0% | Balance | 0.50–1.00% | max 0.20% | max 0.10% |
| CW712R (EN) | 61.0–63.0% | Balance | 0.70–1.30% | 0.20–0.80% | max 0.10% |
International Equivalents – Naval Brass C46400
| Standard | Designation | Region |
|---|---|---|
| ASTM B124 / B283 | C46400 (Naval Brass) | USA |
| EN 12167 | CW712R (CuZn36Sn1Pb) | Europe |
| BS 2874 | CZ112 (Naval Brass) | UK |
| IS 291 | Naval Brass | India |
| DIN 17660 | CuZn39Sn1 | Germany |
| JIS H3250 | C4640 | Japan |
| MIL-B-16166 | Naval Brass | US Military |
Mechanical Properties – C46400 Naval Brass Forgings
| Property | Value |
|---|---|
| Tensile Strength (UTS) | 380–490 MPa (55–71 ksi) |
| Yield Strength (0.2%) | 145–200 MPa |
| Elongation | 15–35% |
| Hardness | 85–100 HRB |
| Density | 8.41 g/cm³ |
| Forging Temperature | 640–730°C |
| Marine Corrosion Resistance | Superior to C28000 / C37700 |
Applications of C46400 Naval Brass Forgings
C46400 naval brass forgings are used wherever marine-grade corrosion resistance is required in a forgeable copper alloy. Key applications include: seacock and sea valve bodies for ship hulls; marine pump impeller housings; propeller shaft bearings and stern tube bushings; naval deck hardware; marine heat exchanger tube sheet forgings; offshore platform valve bodies; marine anchor windlass components; ship hawse pipe fittings; port and starboard navigation light bodies; and oil rig valve bodies in seawater service. C46400 is also used in desalination plant valve bodies and heat exchanger components where brackish or saline water is encountered.
- Seacock and sea valve bodies (ASTM B283, Lloyd’s Register, Bureau Veritas approved)
- Marine pump housings and impeller bodies
- Propeller shaft components: stern tube bushings, shaft bearing retainers
- Naval deck hardware: cleats, fairleads, chocks, bollards
- Offshore valve bodies in seawater injection and cooling service
- Desalination plant (SWRO, MED) valve bodies and heat exchanger headers
Pricing
Indicative Price: US$ 13.30 per kilogram (CIF). Classification society material certificates (Lloyd’s, Bureau Veritas, DNV GL) available on request. Contact us for marine application quotation.
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See also: Brass Forging Parts Overview | CW712R Naval Brass (EN) | C48200 Medium Leaded Naval Brass | C36500 Leaded Muntz Metal