What is C46400 Naval Brass?
C46400 naval brass is a copper-zinc-tin brass alloy used for marine hardware, shafting, fasteners, fittings, and corrosion-resistant machined components. It is commonly called naval brass, 464 brass, or uninhibited naval brass in U.S. supplier catalogs.
The tin addition improves resistance to dezincification and corrosion compared with many plain brasses, which is why C46400 is often associated with marine and seawater-adjacent service. Product form and temper matter, so engineering properties should be matched to the exact rod, bar, plate, or tube specification.
Common Names and Cross References
| Name or designation | How it is commonly used |
|---|---|
| C46400 | UNS alloy designation |
| Naval brass | Common alloy name |
| 464 Brass | Common stock and purchasing name |
| Uninhibited naval brass | Common datasheet description |
Chemical Composition (%)
| Element | Minimum | Maximum | Nominal |
|---|---|---|---|
| Copper (Cu) | 59.0 | 62.0 | - |
| Tin (Sn) | 0.50 | 1.0 | - |
| Lead (Pb) | - | 0.20 | - |
| Iron (Fe) | - | 0.10 | - |
| Zinc (Zn) | Remainder | Remainder | Balance |
Mechanical and Physical Properties
C46400 is a wrought alloy, and properties vary by plate, rod, bar, tube, and temper.
| Property | Typical published value |
|---|---|
| Tensile strength | About 55,000-88,000 psi, depending on form and temper |
| Yield strength | About 25,000-57,000 psi, depending on form and temper |
| Elongation | About 17-50%, depending on form and temper |
| Density | 0.304 lb/in3 |
| Electrical conductivity | 26% IACS |
| Thermal conductivity | 67 Btu-ft/(hr-ft2-F) |
| Modulus of elasticity | 15,000 ksi |
| Machinability rating | 30, based on free-cutting brass = 100 |
| Forgeability rating | 90 |
Fabrication and Welding Suitability
| Operation | Suitability |
|---|---|
| Hot forming | Excellent |
| Cold working | Fair |
| Soldering | Excellent |
| Brazing | Excellent |
| Oxyacetylene welding | Good |
| Butt welding | Good |
| Gas shielded arc welding | Fair |
| Coated metal arc welding | Not recommended |
Typical Applications for C46400
- Marine hardware, fittings, and corrosion-resistant fasteners.
- Propeller shafts, shafting components, lock pins, and bushings.
- Valve stems and valve components.
- Condenser and heat exchanger components.
- Rod, bar, plate, and tube parts for saltwater-adjacent service.
RFQ Details for C46400 Parts
Send the C46400 callout, product form or temper if specified, dimensions, quantity, finish requirements, marine or fluid-service conditions, and drawing files. If the part is a bearing rather than marine brass hardware, compare the requirement with C93200 / SAE 660 bearing bronze.
Available Forms
Available Forms and Shapes
Review common product forms for Naval Brass C46400, then send drawings, dimensions, quantity, and finished-part requirements for material and production guidance.
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