Gilding Metal Small Arm Ammunition Cups

General Description
Product Specifications
Gallery & Media
Point of Contact for further follow up
Others
Product Manufacturer
Yantra India Limited (YIL)
Designing/Manufacturing agency
YIL
Product Description

Gilding metal is a copper-zinc alloy used to manufacture the protective cups, or jackets, for small arms ammunition. While traditional cartridges often feature a lead core, the gilding metal cup encases it to prevent barrel fouling, improve accuracy, and ensure structural integrity at high velocities.

Features/Roles/Variants of the product
Gilding metal is an alloy of copper and zinc, typically with a high copper content, such as 90% copper and and 10% zinc (CuZn10).
This alloy has excellent cold-working properties, including deep drawability and malleability. This is critical for the "cup and draw" manufacturing process, which forms a flat metal disc into a finished case through multiple drawing stages.
Compared to brasses with higher zinc content, gilding metal has a lower rate of work hardening. This allows manufacturers to perform multiple forming operations without the need for frequent intermediate annealing, streamlining the production process.
Due to its high copper content, gilding metal is highly resistant to stress corrosion cracking and dezincification (the leaching of zinc from the alloy).
This ensures long-term reliability and safe storage, especially in marine or severe weather environments.
The combination of strength and ductility allows the finished cups to withstand the high pressures of firing without failure.
The material's predictable forming behavior, combined with fewer annealing steps, results in a highly consistent and reliable manufacturing process.
Product Specification
Basic Information
End Use - Bullets for Small Arms Ammunition
Material - 90/10 Brass
Dimension - OD- 8.95 mm to14.55 mm & Height – 0.5mm to 1.7mm
Weight - 3.8 gm to 5.4gm
End User - Indian Armed Forces, Paramilitary Forces & State Police
Deployments and orders received for the product
Supplying to DPSU