C47000

Naval Brass stands as a copper-zinc alloy in a 60:40 ratio, enriched with around 1% tin to bolster its corrosion resistance, particularly countering dezincification. This alloy adopts a two-phase alpha-beta configuration, granting it a relatively robust strength profile albeit displaying lower ductility compared to the single-phase 70:30 or alpha brass. Its application finds a stronghold in structural contexts and forgings, especially in scenarios where exposure to seawater might induce corrosion. The mechanical attributes of Naval Brass closely mirror those of 60:40 brass C28000, with the tin addition contributing to a slightly heightened strength. C47000 exhibits favorable responsiveness to hot working and is amenable to cold working as well, albeit not as seamlessly as the single-phase alpha brasses.

CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 57.00 61.00
Pb 0.05
Sn 0.25 1.00
Al 0.01
Total Others 0.40
Zn Remainder
MECHANICAL PROPERTIES ACCORDING TO UNS C47000
Mechanical properties as agreed between purchaser and supplier.
PHYSICAL PROPERTIES
Density8.9 g/cm³
Fabrication Properties
TechniqueSuitability
SolderingExcellent
BrazingExcellent
Oxyacetylene WeldingGood
Gas shielded Are WeldingFair
Coated Metal Are WeldingNot Recommended
Spot WeldGood
Seam WeldFair
Butt WeldGood
Capacity for Being Cold WorkedFair
Capacity for Being Hot FormedExcellent
Forgeability Rating90
Machinability Rating30

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